The Tube Amp Inc. New website with a few schematics and information on tube amplifiers. Also has a message board and a very complete links page!
Old Guitar Amp Dot Com Vintage tube amp info, How to date your old guitar amp. Check out our gallery of vintage guitar amps! We buy, sell, and TRADE!
AmpTone.com Guitar Amps, Effects Placement, and Quiet Cranked Tube Amp Tone.
Steve's Vacuum Tube Related Web Site This site features several articles, all of which feature original research by Steve Bench. All items in the "Technical reprts" section are highly recommended.
VintageSpeaker Best Prices on Vintage Jensen Re-issue Speakers! Get Specs,Geaphs, and details for all available!
Russ's Valve Amps Personal site with guitar amps, homebrew guitar amps, tube amps and schematics.
DIRTY Amps Dirty Class A amps. Lots of cool designes!
Doctor Vox follow the hot links trail...and take the workshop tour....
House of Jim Homebuilding site with DIY info, old Hammond tranny data and the beginnings of a schematics section. Submit anything you'd like to contribute!
AX84 Homebrew guitar amp and effects projects for beginners and experts alike
Traynor Tweaks! Site devoted to modding Traynor amps. Also included are catalogue scans, other amp pics, and homebrew stuff.
ThunderTweak Amps Marshall layouts & schems. Also info on Tweed Deluxe, Bassmen and Champs. Parts and Info links.
Marshall Chassis Pics Photos of the guts of plexi and early '70s Marshalls, including JTM45, JTM45-100, Lead, Superlead, Superbass, PA, Master Lead, Park 45 and Park 100.
Vox Talks You will find a wide range of topics being discussed in relation to the sounds of the '60s and in particular the gear that changed the sound of music forever.
SCHEMATIC HEAVEN A HUGE Archive of classic amp schematics, built through a cooperative effort by worldwide schematic donor's. Keep Em Coming... !
The Gibson Amp Project An overview of Gibson guitar and accordion amplifiers from the '30s to the late '60s. Cabinet styles, specifications, schematics...
The unofficial ADA MP-1 website The unofficial ADA MP-1 website. Here you can find info regarding the ADA MP-1 and other ADA stuff like the MP-2, MP-1 Classic, MB-1, Ampulator, Microtube and more.
The Les Paul Forum Want to talk about Les Pauls? The Les Paul Discussion Board is a great place to ask questions or exchange information about all Gibson Les Paul guitars.
Stones amp inn Discussion bulletin (mostly German), some custom mods on Marshalls and in general, etc.
Selmer amp schematics Courtesy of Steve Russell we now have a site dedicated to Selmer amps. Numerous schematics. http://www.steverussell.freeserve.co.uk/hofner/schematic/wire.html
Ken's Tube Amp Pages Design notes from preamp and Big Ass Guitar Amp, lots of technical articles, datasheets, newsgroup threads, scanned books and articles, etc.
Robsjcm800 Great info for beginners! Info on bias, grid resistors, components, layouts and more.
Dr. Tube Homepage of a Dutch tube shop with lots of schematics of tube amps.
Aiken Tube Amplfier Fan Club Dedicated to information sharing on Aiken Amplifiers and Products. Most of the current members are owners or appreciators of the Aiken Invader amplifier. Please share your tips, comments and experiences. There is a complete review of the Invader amp in the Files section of this group.
GDS Amplification 18W home The home of GDS Amps' 18W and the new 45W. GDS Amps supplies complete amplifiers, amplifier kits for the DIYer and bare chassis, transformers and plexi panels for the 18W and 45W amps.
Tone-Tools Replacement Amp cabinets, extention cabs, Fat Cat guitar speaker cabinets, Amp & guitar shop.
AMP-TEK Amplifier repair - Tubes & Transistors - All make & Models - Fast & reliable - Emergency
The Tone Zone Audio electronics parts and service including Hoffman board kits
Complete Rebuild of a Deluxe Reverb Reissue Amp - UPDATED URL!! The site has become too popular. I needed to change web hosting services to handle the traffic. Please use this new URL: http://waynereno.com/ This extensive website is about my experience with MikeyMann Amplification turning my Fender Deluxe Reverb Reissue (DRRI) into a reborn, boutique amp. Casting aside the printed circuit board and stock transformers, Mikey breathed new life into this amp with thoughtful improvements to enhance the sound and serviceability.
Kress Amps Offers custom build head and cabinet enclosers in any option you can dream. Recovering service also.
Vintage Amps and Guitars Vintage Amps and Guitars by Rock n Roll Vintage. Check out our clean vintage amps. Stop by our site and check out our ebay auctions.
Antique Radio Schematics - JustRadios Specializes in schematic diagrams for antique tube radios. Also carries service data for old TV's , CB's, Hi-Fi's and vintage transistor and car radios.
Chris B's Music High end amps for sale and trade. Amp resources, articles, faq's, newsletter. Free appraisals
BETERAMP The best tube amp for country and blues players, class - A , lowest prices ,handmade,5 years warranty and many other features... Custom Cabinets , worldwide shippment,repair service & tube amp mods. CUSTOM SHOP AMPS
RESTORATION TIPS, HINTS, & LINKS Determining Turns Ratio and Impedance Ratio of Output Transformers,Identifying Power Transformer Windings, Speaker Repair,Troubleshooting tips, etc.
Omegaamps We build amps and do crazy mods, chek out Omegaamp reviews at Harmony Central!
The Amplitrex AT1000 Vacuum Tube Tester Now there is an alternative to ancient and costly vintage tube testers. Microprocessor-based portable tester tests hundreds of tubes for emission, mutual conductance, leakage, shorts and gas. Even plots characteristic plate curves with your personal computer...
Pritchard Amps Unique, versatile amps with boutique tones. Many voices - great for most styles. Room filling power. Watts Knob for small gigs. Practice Jack for really low volume. Portable - Ultimate guitar amp..
SCHEMATIC HEAVEN A HUGE Archive of classic amp schematics, built through a cooperative effort by worldwide schematic donor's. Keep Em Coming... !
West Laboratories Guitar Amplifiers History of West Amps, Schematics Etc. Prime source for conductive plastic pots, precision metal film resistors, replacement transformers for Matchless Etc.
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
Texas Tube Amplifier Company Custom built low wattage tube amplifiers. Point to point contruction. I use Riken resitors, Jensen tone caps in my F 1 & SE . I use custom Heyboer transformers in my SE.
scotts home page heres my page, i have some drawings of cabinets and some other things to look at as well
Vintage SoundWorks A quality Canadian repair shop providing tubes, parts, accessories and personalized customer service to musicians, collectors and hobbyists worldwide since 1995
Vodka Mods Vodka Mods - High Quality effects pedal mods at rock bottom prices. Premodded pedals, DIY kits, and mail-in modding service are all available. Take the goggles off your tone!
The Bedrock Amplifier Tribute Page While searching the internet for some information about my Bedrock 1200 amp, I was really surprised to find there is about zilch for information online about Bedrock amps...
Marshall law tube amp discussion with archives of mods, specifications and diagrams. very user friendly for amp and guitar info and chat
DreamTone Amp building tips and layouts '2204', Custom Chassis, Amp Boards, Tube Data, Pro Jr., 18watt, 5E7, and more!
Tubewonder Tubewonder is an all tube single channel amp with a unique way of controlling even and odd harmonics in your sound. An active tube based equalizer gets rid of the gain loss caused by the passive tonestacks.
tonedogs Boutique amp dealer- new and used
Texas Tube Amplifier Company Custom built low wattage tube amplifiers. Point to point contruction. I use Riken resitors, Jensen tone caps in my F 1 & SE . I use custom Heyboer transformers in my SE.
Trinity Amps Marshall 18 Watt and Matchless Lightning Inspired Custom Amps, plus a NEW Forum featuring Matchless.
Custom Cabinet Company Top quality hand crafted lightweight cabinets with built in microphone and interchangeable front and rear panels
Uglyamps We sell custom tube guitar amps at working man's prices
The Bedrock Amplifier Tribute Page While searching the internet for some information about my Bedrock 1200 amp, I was really surprised to find there is about zilch for information online about Bedrock amps...
CMW amps repairs , mods & custom-builts in the Netherlands
JMI Music Amp and guitar parts. Mercury Magnetics stocking dealer.
Louis Electric Amplifiers The world's finest all hand built amplifiers played by the world's finest artists. Keith Richards Dave Mathews John Fogerty Warren Haynes Hubert Sumlin Duke Robillard Danny Gatton Arlen Roth.... to name but a few !
THE TWRECK PAGE...A tube amp builder's community THE forum for build-it-yourself discussions of Trainwreck (Express, Liverpool, Rocket, Dirty Little Monster, etc.) and Dumble(Overdrive Special, Steel String Singer, Dumbleland, Odyssey, Winterland, etc.)-style amps!
Kongetsu no Tokusyuu (Monthly Spotlight Articles) Various articles (in Japanese) on guitars and amps covering topics such as original Firebird IIIs, building a Two Rock Ruby kit, the Marshall Hand-Wired 2061X, 18watt Marshall and clone variants, trapeze tailpiece-equipped guitars, restoring a '71 Fender Rhodes, 5E8 Tweed Twins, the '02 Duane Allman model Les Paul, Tweed Deluxes and their clones, and so on. Many pictures.
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
Tone-Tools Home of Fat Cat Guitar Speaker Cabinets.
CJLectronics Repair, Modification, and custom jobs on all of your musical electronic equipment.
Big Bends Nut Sauce The original guitar nut and saddle lube! Get in tune and stay in tune! Use what the guitar tech's are using.
Vacuum Tube Design and Application Notes Some interesting active tone control circuits, Miscellaneous amplifiers. Also, Publications for download: Special Purpose Oscillators and Amplifiers TM-11-680. Washington D.C.: Department of the Army, July 1952. (PDF, 7.8 MB, 130 pages). Bates, R. H. "A Direct-Coupled Amplifier with Cathode Follower." Radio & Television News, November, 1949, pp. 62-63. Boegli, Charles P. "Simplified Cross-Coupled Amplifier," Radio & Television News, May 1959, pp. 62, 81. (HTML, 460 KB) Brooks, Herbert B. Circular of the National Bureau of Standards, C408: Information for the Amateur Designer of Transformers for 25- to 60-Cycle Circuits. Washington D.C.: United States Government Printing Office, 1935. (PDF, 2.1 MB). The object of Brooks' circular according to its introduction is "to assist the amateur in the design of small and medium-sized single-phase transformers for operation in the usual power frequencies. It is assumed that one transformer, or at most a few transformers are to be built, and that successful operation with good-efficiency and reasonable cost is the goal...." Dorf, Richard H. "The Universal Vibrato," Radio & Television News, April 1954, pp. 52, 53, 90-93. (PDF 2.7 MB) Dorf, Richard H. "The Wurlitzer Vibrato," Electronic Musical Instruments, 2nd ed. Mineola, N.Y.: Radio Magazines, 1958, pp. 138-141. (PDF, 1.2 MB) Ferras, Allan M. "A Bass-Boost Control," Radio & Television News, July 1954, pp. 52-53, 88. (PDF 3.9 MB, apologies in advance for the lousy copy) Hust, L. B. "Extended Class A Amplifier," Radio & Television News, September 1953, pp. 40-42, 146-148. (PDF, 1.8 MB) Koller, L. R. The Physics of Electron Tubes. New York: McGraw-Hill Book Company, Inc., 1934 (PDF, 23 MB) Rider, John F. Vacuum Tube Voltmeters. New York: John F. Rider Publishing, Inc., 1941. (PDF, 21 MB) Terman, Frederick E., "Regeneration in Multistage Audio- and Video-frequency Amplifiers," Electronic and Radio Engineering. New York: McGraw-Hill Book Company, 1955, pp. 360-363. (PDF, 565 KB) Tepper, M. "Grid-Leak Bias," Basic Radio, Vol. 3: Electron Tube Circuits. New York: John F. Rider Publisher, Inc., 1961, p. 78 (PDF, 244 KB) Valley, George E. and Wallman, Henry, eds. Vacuum Tube Amplifiers. New York: McGraw-Hill Book
Hbamps Amps that rock the world
Octal Fatness (pentode preamp) DIY amp This is a 5-10W amp which employs a pentode preamp, 3-band tone stack, and single-ended output stage. It is designed by David Jones, and has a sweet and airy clean tone as well as being capable of fat blues and rock tones. It has a 6SJ7 metal pentode and 12AX7 gain stage/buffer in the preamp as well as a 6V6 output tube. I used a variable cathode resistor in the output stage which allows me to use a 6AR6 or 6L6 for more power if desired. The 6SJ7 provides a lot of compression and the amp has a lot of sustain when clean or dirty.
Tubes for Newbies As not everybody is familiar with tubes, here are some elements that will let you understand better this world...
grounding article by Tetsu Kimura What do you do with the grounds in your tube amp? An English translation of Tetsu Kimura-san's article on grounding. Plus grounding-related links.
Vodka Mods High Quality guitar effects pedal mods at rock-bottom prices. Premodded pedals, DIY kits, and Modding service are all available. Cool merchandise, too.
Transistor Identichart Originally published around 1980 in Practical Electronics, this chart shows case types, lead markings and similar transistor numbers.
Complete Rebuild of a Deluxe Reverb Reissue Amp This extensive website is about my experience with MikeyMann Amplification turning my Fender Deluxe Reverb Reissue (DRRI) into a reborn, boutique amp. Casting aside the printed circuit board and stock transformers, Mikey breathed new life into this amp with thoughtful improvements to enhance the sound and serviceability.
Texas Instruments on-line training "Analog Electronic Design in a Day!", "Constructing Your Power Supply - Layout Considerations", "Safety Considerations in Power Supply Design", and more...
Vacuum Tube Design and Application Notes Some interesting active tone control circuits, Miscellaneous amplifiers. Also, Publications for download: Special Purpose Oscillators and Amplifiers TM-11-680. Washington D.C.: Department of the Army, July 1952. (PDF, 7.8 MB, 130 pages). Bates, R. H. "A Direct-Coupled Amplifier with Cathode Follower." Radio & Television News, November, 1949, pp. 62-63. Boegli, Charles P. "Simplified Cross-Coupled Amplifier," Radio & Television News, May 1959, pp. 62, 81. (HTML, 460 KB) Brooks, Herbert B. Circular of the National Bureau of Standards, C408: Information for the Amateur Designer of Transformers for 25- to 60-Cycle Circuits. Washington D.C.: United States Government Printing Office, 1935. (PDF, 2.1 MB). The object of Brooks' circular according to its introduction is "to assist the amateur in the design of small and medium-sized single-phase transformers for operation in the usual power frequencies. It is assumed that one transformer, or at most a few transformers are to be built, and that successful operation with good-efficiency and reasonable cost is the goal...." Dorf, Richard H. "The Universal Vibrato," Radio & Television News, April 1954, pp. 52, 53, 90-93. (PDF 2.7 MB) Dorf, Richard H. "The Wurlitzer Vibrato," Electronic Musical Instruments, 2nd ed. Mineola, N.Y.: Radio Magazines, 1958, pp. 138-141. (PDF, 1.2 MB) Ferras, Allan M. "A Bass-Boost Control," Radio & Television News, July 1954, pp. 52-53, 88. (PDF 3.9 MB, apologies in advance for the lousy copy) Hust, L. B. "Extended Class A Amplifier," Radio & Television News, September 1953, pp. 40-42, 146-148. (PDF, 1.8 MB) Koller, L. R. The Physics of Electron Tubes. New York: McGraw-Hill Book Company, Inc., 1934 (PDF, 23 MB) Rider, John F. Vacuum Tube Voltmeters. New York: John F. Rider Publishing, Inc., 1941. (PDF, 21 MB) Terman, Frederick E., "Regeneration in Multistage Audio- and Video-frequency Amplifiers," Electronic and Radio Engineering. New York: McGraw-Hill Book Company, 1955, pp. 360-363. (PDF, 565 KB) Tepper, M. "Grid-Leak Bias," Basic Radio, Vol. 3: Electron Tube Circuits. New York: John F. Rider Publisher, Inc., 1961, p. 78 (PDF, 244 KB) Valley, George E. and Wallman, Henry, eds. Vacuum Tube Amplifiers. New York: McGraw-Hill Book
marshall law tube amp and guitar forum for musicians, by musicians
Tubewonder Tubewonder is an all tube single channel amp with a unique way of controlling even and odd harmonics in your sound. An active tube based equalizer gets rid of the gain loss caused by the passive tonestacks.
Tube Amp Doctor (TAD) Home of the TAD Tubes in Germany. Tons of amp spares and a full PDF catalog for download ... also in english.
Uglyamps We sell custom tube guitar amps at working man's prices
Craig's Guitar Tech Resource Free information for anyone wishing to learn more about guitar electronics, construction, and tone. Switches and wiring demystified. Simple phasing test insures you wire all pickups in phase. Free custom designed wiring diagrams. More...
grounding article by Tetsu Kimura What do you do with the grounds in your tube amp? An English translation of Tetsu Kimura-san's article on grounding. Plus grounding-related links.
Damage Control USA Damage Control designs and manufactures premium quality audiophile guitar products for world-class musicians. Our design philosophy fuses the absolute best qualities of analog, digital, and mechanical designs. Our products provide musicians with premium, no-compromise, tools that inspire musical performance and creativity. Our products offer expertly balanced retro and cutting edge technologies with ground-breaking sonic fidelity, performance, features, and style.
DreamTone Amp building tips and layouts '2204', Custom Chassis, Amp Boards, Tube Data, Pro Jr., 18watt, 5E7, and more!
The Great Capacitor Debate! Info on vintage capacitor types seen in amps such as Marshalls. "There are various types of capacitor used, and some are worse than others. The most common types are detailed here.."
MISCELLANEOUS DOCUMENT ARCHIVE courtesy of one-electron.com "Getter Materials for Electron Tubes" from Oct. 1950 Electronics., "What Cathode is Best for the Job?" from April 1959 Electronic Industries, "The Material and Shapes of Vacuum Tube Heaters" from Dec. 1961 Electronic Industries, "Tubes or Transistors?" from April 1959 Electronic Industries, "Vacuum Tube Ratings" 1945 paper by Eimac, "Tube Filament and Heater Characteristics" July 1944 issue of Electronics magazine, "Designing and Constructing Direct-Coupled A.F. Amplifiers, Part I and Part II" - articles in the August and September1933 issues of Radio-Craft, "MotorBoating," What It Is and Why August 1927 Radio News, plus more interesting documents and articles!
Getting rid of Self-HUM in guitar tube amps by JC Maillet One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
Tube Haven Open Forum discussion on Tube amps, guitars, recording, anything to do with producing music. Very friendly site.
GRAMPIAN, DALLAS/SHAFTESBURY, & ELPICO AMPLIFIERS This site, like the Selmer Amplifier Website, is a joint collaboration between Tim Fletcher and myself, Steve Russell. We both feel very strongly that the old British amps like Selmer, Watkins, Bird, and Fenton-Weill together with a few others, have been pushed into the shadows by the admittedly well deserved publicity heaped upon Vox and Marshall, and these webpages are our attempts to redress the balance a little. This section is our attempt to sweep up the more minor amplifier brands of the late 1950's/early 1960's.
The Speaker Shop Vintage and Antique speaker repair service with over 20000 parts and the expertise to do the RIGHT work. Factory service for Electro Voice and many others.
dreamtone building details with grapics, 1-Ohm Cathode bias method explained, parts, wire, and custom made amp boards, such as a Fender Pro Jr., or a Jcm800 2204. Schematics, Tube Data, and Audio Projects! Thanks for Visiting
Lead Dress in Tube Amps by RG Keen Lead dress in tube amps is a tough subject. Just moving wires around inside a chassis with a wooden stick can cause otherwise-intractable hum or oscillation, or cure it. How do you know what wire to put where?
Guitar China Direct Your Supplier(www.ursupplier.com) provide below products & services : musical instrument , guitar , jazz guitar ,beginner guitar , acoustic guitar , acoustic bass guitar , electric guitar , electric bass guitar , guitar amps (electric guitar amplifier , electric bass guitar amplifier ) ,violin , electric violin , guitar accessories or parts ( guitar tuner , guitar bag , guitar strings , etc.) musical instrument wholesale , guitar wholesale , guitar vendor , guitar trader , guitar supplier , guitar bulk sale , auto parts. www.ursupplier.com is a guitar distributor , a guitar importer , a guitar exporter , too . Our specialized field is wholesale guitars , import guitars , export guitars , guitar dropship . you can buy many kinds of guitar or violin online . please visit our website : http://www.ursupplier.com online guitar catalog , online violin catalog: http://www.ursupplier.com/shop online guitar group purchase , online violin group purchase : http://www.ursupplier.com/shop/groupbuy.php
MISCELLANEOUS DOCUMENT ARCHIVE courtesy of one-electron.com "Getter Materials for Electron Tubes" from Oct. 1950 Electronics., "What Cathode is Best for the Job?" from April 1959 Electronic Industries, "The Material and Shapes of Vacuum Tube Heaters" from Dec. 1961 Electronic Industries, "Tubes or Transistors?" from April 1959 Electronic Industries, "Vacuum Tube Ratings" 1945 paper by Eimac, "Tube Filament and Heater Characteristics" July 1944 issue of Electronics magazine, "Designing and Constructing Direct-Coupled A.F. Amplifiers, Part I and Part II" - articles in the August and September1933 issues of Radio-Craft, "MotorBoating," What It Is and Why August 1927 Radio News, plus more interesting documents and articles!
THE TWRECK PAGE...A tube amp builder's community THE forum for build-it-yourself discussions of Trainwreck (Express, Liverpool, Rocket, Dirty Little Monster, etc.) and Dumble(Overdrive Special, Steel String Singer, Dumbleland, Odyssey, Winterland, etc.)-style amps!
kmwec Your Source for Contract Design Solutions.
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
Bulldog Amps Great Handmade Tube Amps Made in Germany! The Tone of Rock´n Roll
Is Point-to-Point Better Than PCB? by Randall Aiken Which is better, point-to-point (PTP), or printed circuit board (PCB)? You will find manufacturers arguing both sides, some quoting outlandish claims to support their argument, others claiming PTP is much better, then, when they start using PC boards, they claim PCB is better. What is the truth?
Fender 63 Reverb Reissue Capacitor Mod Instructions This modification involves replacing the Mixer capacitor C10 with a silver mica capacitor valued at around 390 pf. I used a 500pf capacitor (rated at 500V), because that's what I had in my spare parts bin! Any value in between will probably work as well. The result is a deeper and richer reverb sound - it's hard to describe, but I was very pleased with the results...
RESTORATION TIPS, HINTS, & LINKS Determining Turns Ratio and Impedance Ratio of Output Transformers,Identifying Power Transformer Windings, Speaker Repair,Troubleshooting tips, etc.
SELMER TRUVOICE AMPLIFIERS SITE This page is a joint collaboration between Tim Fletcher and myself, Steve Russell. Tim is an enthusiast who, like me, believes that the old Selmer guitar and bass amplifiers have never received the recognition that they deserve. There is virtually no information available anywhere on these old workhorses from the 60's. Totally different story with Vox amps, of course. The WWW is full of sites expounding the virtues of those admittedly fine amplifiers. Yet, during the early 60's in the UK, both Vox and Selmer were running equally in quality and quantity, supplying the up-and-coming bands of the day with professional standard amplification. Tim and myself would like to help redress the balance. (Site includes some schematics.)
The Technology of... Series by RG Keen The Technology of Envelope Controlled Filters by Mark Hammer How do they do that? It's neat stuff, and taught clearly by the inimitable Mr. Hammer. The Technology of the Fuzz Face Learn how the world's most famous distortion device works, how to mod it and what sounds good. The Technology of the Univibe Puzzled over HOW the univibe does that? Come in, take a look. The Technology of the Tube Screamer Wanna scream, little guitarist? Here's how. The Technology of Bypass Switching True bypass, electronic switching, status LED's, DPDT, 3PDT, you name it, it's in here. The Technology of Wah pedals Walley Wah Pedal lets down his hair...er... battery cover... oh, you know what I mean. The Technology of Phasers and Flangers Phase up to it - you always wanted to know. The Technology of Oil Can Delays
Inside a 1958 Fender Jazzmaster The Jazzmaster was introduced by Fender in 1958. What follows is an inside view of a late 1958/early 1959 Fender Jazzmaster.
Uglyamps We sell custom tube guitar amps at working man's prices
GRAMPIAN, DALLAS/SHAFTESBURY, & ELPICO AMPLIFIERS This site, like the Selmer Amplifier Website, is a joint collaboration between Tim Fletcher and myself, Steve Russell. We both feel very strongly that the old British amps like Selmer, Watkins, Bird, and Fenton-Weill together with a few others, have been pushed into the shadows by the admittedly well deserved publicity heaped upon Vox and Marshall, and these webpages are our attempts to redress the balance a little. This section is our attempt to sweep up the more minor amplifier brands of the late 1950's/early 1960's.
Musical Instruments Supplier Shijiazhuang Yipu Co.,Ltd is a professional China supplier of Guitars, Guitar Straps, Guitar&Violin Bags/Cases, Guitar Strings, Bags/Cases for Wind Instruments, etc. We supply the products above usually by OEM or ODM basis, and also sell them by our own brand ”FLYING” mainly into Europe and North America. Welcome to visit our website: 1)http://www.yipuindustry.com/Guitar.htm 2)http://yipuco.en.ec21.com for details.Thanks!
Guitar Nucleus wiring diagrams. Fender, Gibson, BC Rich, Dimarzio, EMG, Ibanez, micell.
dreamtone building details with grapics, 1-Ohm Cathode bias method explained, parts, wire, and custom made amp boards, such as a Fender Pro Jr., or a Jcm800 2204. Schematics, Tube Data, and Audio Projects! Thanks for Visiting
Inside a 1954 Fender Stratocaster The Stratocaster was introduced by Fender in the spring of 1954. The first month of production was about April, though there are some prototype examples seen with earlier dates. What follows is an inside view of a fall 1954 Strat...
The Materials and Shapes of Vacuum Tube Heaters By W. A. Hasset, Senior Engineer Western Electric Co. In vacuum receiving tubes, heat can be supplied to the cathode by either of two conventional methods; "Directly", by means of a current passed through a filament of base metal to which the emissive material has been applied; or "Indirectly", by means of a separate, insulated heating element which is mounted within the cathode structure. Because the directly heated cathode is rather simple in construction, we will discuss only the heating element in an indirectly heated cathode...
House of Tubes Library ***GE ESSENTIAL CHARACTERISTICS*** TUBE DATA BOOK, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online!
Miscellaneous Document Archive "Getter Materials for Electron Tubes", "What Cathode is Best for the Job?", "The Material and Shapes of Vacuum Tube Heaters" plus more documents and articles
HighOrder Pickups Quality hand built humbuckers at a reasonable price - built to your specifications. Do it for the tone!!
Vintage Fender Guitar Pickup Spec Info Ok, I admit i'm not an electrical engineer. But I get asked about vintage Fender guitar pickups quite often, so here's some info in case you're curious. Most of this information is from Seymour Duncan...
Uglyamps We sell custom tube guitar amps at working man's prices
RSH Electronics Components for stompboxes, amplifiers, pedals and effects. No minimum order, low postage!
Tube Amplifier Theory On this page I will publish some tube amplifier theory. Output transformer impedance calculation is a bit tricky before you get the hang of it. Some useful formulas for calculation of output power, distortion and impedances will also be published. The idea to make this page came up when I bought the Namo Web Editor, which is capable of writing maths (one of the reasons why I bought it)...
Getting rid of Self-HUM in guitar tube amps by JC Maillet One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
Langmuir's talk on Pathological Science (December 18, 1953) Symptoms of Pathological Science: 1. The maximum effect that is observed is produced by a causative agent of barely detectable intensity, and the magnitude of the effect is substantially independent of the intensity of the cause. 2. The effect is of a magnitude that remains close to the limit of detectability; or, many measurements are necessary because of the very low statistical significance of the results. 3. Claims of great accuracy. 4. Fantastic theories contrary to experience. 5. Criticisms are met by ad hoc excuses thought up on the spur of the moment. 6. Ratio of supporters to critics rises up to somewhere near 50% and then falls gradually to oblivion.
Kongetsu no Tokusyuu (Monthly Spotlight Articles) Various articles (in Japanese) on guitars and amps covering topics such as original Firebird IIIs, building a Two Rock Ruby kit, the Marshall Hand-Wired 2061X, 18watt Marshall and clone variants, trapeze tailpiece-equipped guitars, restoring a '71 Fender Rhodes, 5E8 Tweed Twins, the '02 Duane Allman model Les Paul, Tweed Deluxes and their clones, and so on. Many pictures.
THE TWRECK PAGE...A tube amp builder's community THE forum for build-it-yourself discussions of Trainwreck (Express, Liverpool, Rocket, Dirty Little Monster, etc.) and Dumble(Overdrive Special, Steel String Singer, Dumbleland, Odyssey, Winterland, etc.)-style amps!
The Technology of... Series by RG Keen The Technology of Envelope Controlled Filters by Mark Hammer How do they do that? It's neat stuff, and taught clearly by the inimitable Mr. Hammer. The Technology of the Fuzz Face Learn how the world's most famous distortion device works, how to mod it and what sounds good. The Technology of the Univibe Puzzled over HOW the univibe does that? Come in, take a look. The Technology of the Tube Screamer Wanna scream, little guitarist? Here's how. The Technology of Bypass Switching True bypass, electronic switching, status LED's, DPDT, 3PDT, you name it, it's in here. The Technology of Wah pedals Walley Wah Pedal lets down his hair...er... battery cover... oh, you know what I mean. The Technology of Phasers and Flangers Phase up to it - you always wanted to know. The Technology of Oil Can Delays
AudioRoundTable.com Audio Discussion Forum. From tubes to solid state, turntables and tapes to digital, and horns to planars.
Screen Grids in Audio and RF Modulator Power Tubes Traditionally, the design of audio amplifiers has followed fairly clear and well established design principles. Some of those principles relate to the way in which Screen Grids are used to control current flow in audio amplifier tubes, particularly power tubes...
Getting rid of Self-HUM in guitar tube amps by JC Maillet One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
Mike Soldano Tech Article What's the difference between a Series & Parallel effects loop? Point to Point vs Printed Circuit Boards? Tube vs Solid State Rectifiers? Class A and Class A/B?
Audio By Design Vintage speakers and electronics for sale. (sample)Ampeg S12B fliptop amp excellent ORIGINAL condidtion $ 700.00.
DGB Studio Guitar, Bass, Ukulele, instruments pickup, wiring, schematics, diagrams, humbucker, Single Fret, strings, amp, Harmonics, electric, electronics, efect, mods, repair
Fender 63 Reverb Reissue Capacitor Mod Instructions This modification involves replacing the Mixer capacitor C10 with a silver mica capacitor valued at around 390 pf. I used a 500pf capacitor (rated at 500V), because that's what I had in my spare parts bin! Any value in between will probably work as well. The result is a deeper and richer reverb sound - it's hard to describe, but I was very pleased with the results...
RADIO CHASSIS RENOVATION Guide to powering up and checking over an old valve radio. "Initial Checks", "Check Previous Repairs", "Check Resistors", "Gradual Application of H.T.", "Mains Power At Last... Sort Of". For valve radios but should be useful in applying to long unused tube equipment.
Musical Instruments Supplier A professional China supplier of Guitars, Guitar Straps, Guitar&Violin Bags/Cases, Guitar Strings, Bags/Cases for Wind Instruments, etc.
CJLectronics Repair, Modification, and custom jobs on all of your musical electronic equipment.
Palette Amps This is a place where the highest excellence in tube amplifier engineering and design meets the sonic demands of the experienced, modern musician.
Musical Instruments Supplier A professional China supplier of Guitars, Guitar Straps, Guitar&Violin Bags/Cases, Guitar Strings, Bags/Cases for Wind Instruments, etc. We supply the products above usually by OEM or ODM basis, and also sell them by our own brand ”FLYING” mainly into Europe and North America.
Hbamps Amps that rock the world
Octal Fatness (pentode preamp) DIY amp This is a 5-10W amp which employs a pentode preamp, 3-band tone stack, and single-ended output stage. It is designed by David Jones, and has a sweet and airy clean tone as well as being capable of fat blues and rock tones. It has a 6SJ7 metal pentode and 12AX7 gain stage/buffer in the preamp as well as a 6V6 output tube. I used a variable cathode resistor in the output stage which allows me to use a 6AR6 or 6L6 for more power if desired. The 6SJ7 provides a lot of compression and the amp has a lot of sustain when clean or dirty.
"Developments in Trustworthy-Valve Techniques" from Electrical Communication magazine for September 1954 It has not been uncommon for designers of radio and radar equipment to state categorically that valves are inherently unreliable. Such criticism has been regarded with some scepticism by valve engineers, who have ample evidence of trouble-free operation of certain valves, such as those used in long-distance telephone repeater and carrier systems, and therefore were able to visualise suitably designed valves that could be manufactured by mass production methods and yet give reliable operation under certain special mechanical conditions. Valve-manufacturing methods are determined simply by the economics of supply and demand, and the valve maker must be sure that the many complicated piece parts that are used to build a modern receiving valve and the special finishing processes that are employed are all devised to secure ease of assembly and rapid exhaust so that the valves manufactured shall be salable... .pdf file. 17pgs.
The Materials and Shapes of Vacuum Tube Heaters By W. A. Hasset, Senior Engineer Western Electric Co. In vacuum receiving tubes, heat can be supplied to the cathode by either of two conventional methods; "Directly", by means of a current passed through a filament of base metal to which the emissive material has been applied; or "Indirectly", by means of a separate, insulated heating element which is mounted within the cathode structure. Because the directly heated cathode is rather simple in construction, we will discuss only the heating element in an indirectly heated cathode...
Trans-ya website How to make transformers. Has great detail (pictures, materials, tools needed, sources, etc.) but website is only in Japanese.
The Technology of... Series by RG Keen The Technology of Envelope Controlled Filters by Mark Hammer How do they do that? It's neat stuff, and taught clearly by the inimitable Mr. Hammer. The Technology of the Fuzz Face Learn how the world's most famous distortion device works, how to mod it and what sounds good. The Technology of the Univibe Puzzled over HOW the univibe does that? Come in, take a look. The Technology of the Tube Screamer Wanna scream, little guitarist? Here's how. The Technology of Bypass Switching True bypass, electronic switching, status LED's, DPDT, 3PDT, you name it, it's in here. The Technology of Wah pedals Walley Wah Pedal lets down his hair...er... battery cover... oh, you know what I mean. The Technology of Phasers and Flangers Phase up to it - you always wanted to know. The Technology of Oil Can Delays
SELMER TRUVOICE AMPLIFIERS SITE This page is a joint collaboration between Tim Fletcher and myself, Steve Russell. Tim is an enthusiast who, like me, believes that the old Selmer guitar and bass amplifiers have never received the recognition that they deserve. There is virtually no information available anywhere on these old workhorses from the 60's. Totally different story with Vox amps, of course. The WWW is full of sites expounding the virtues of those admittedly fine amplifiers. Yet, during the early 60's in the UK, both Vox and Selmer were running equally in quality and quantity, supplying the up-and-coming bands of the day with professional standard amplification. Tim and myself would like to help redress the balance. (Site includes some schematics.)
Getting rid of Self-HUM in guitar tube amps One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
Miscellaneous Document Archive "Getter Materials for Electron Tubes", "What Cathode is Best for the Job?", "The Material and Shapes of Vacuum Tube Heaters" plus more documents and articles
Manufacture of Junction Transistors The following article first appeared in Mullard's 'Outlook' brochure that they distributed to their various service departments and dealers. This particular article was in their January 1961 issue...
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
Vintage Guitar Buyer I buy name brand vintage guitars, amps and effects from Gibson, Fender, Marshall and others. If you want to sell your guitar take a look at my site !
Musical Instruments Supplier Shijiazhuang Yipu Co.,Ltd is a professional China supplier of Guitars, Guitar Straps, Guitar&Violin Bags/Cases, Guitar Strings, Bags/Cases for Wind Instruments, etc. We supply the products above usually by OEM or ODM basis, and also sell them by our own brand ”FLYING” mainly into Europe and North America. Welcome to visit our website: 1)http://www.yipuindustry.com/Guitar.htm 2)http://yipuco.en.ec21.com for details.Thanks!
Index of /tdirstein/Tubes/ good reference site for older EL34 tubes. Shuguang, Matsushita, Mullard, Philips, Siemens, Svetlana, Tesla.
VALVE MICROPHONICS The construction of a valve is not a completely rigid structure. Any relative movement of the various electrodes not only affect inter-electrode capacitances but also variations in current and mutualconductance. Such relative movements can be caused by vibration, such as sudden knocks or even ambient sounds. Mullard presented the results of an investigation into micrphonics in valves which it published in two articles that appeared in the November 1962 issue of their publication "Mullard Technical Communications". A summary of their findings follows.
Palette Amps This is a place where the highest excellence in tube amplifier engineering and design meets the sonic demands of the experienced, modern musician.
The Soul of Sound page Hi-Fi oriented. "The Hidden Harmonics behind THD", "A Tiny History of High Fidelity", "Building a Better Capacitor" articles, "Getting the most out of Vacuum Tubes" (1960) book scan and more...
VALVE MICROPHONICS The construction of a valve is not a completely rigid structure. Any relative movement of the various electrodes not only affect sinter-electrode capacitances but also variations in current and mutualconductance. Such relative movements can be caused by vibration, such as sudden knocks or even ambient sounds. Mullard presented the results of an investigation into micrphonics in valves which it published in two articles that appeared in the November 1962 issue of their publication "Mullard Technical Communications". A summary of their findings follows.
RADIO CHASSIS RENOVATION Guide to powering up and checking over an old valve radio. "Initial Checks", "Check Previous Repairs", "Check Resistors", "Gradual Application of H.T.", "Mains Power At Last... Sort Of". For valve radios but should be useful in applying to long unused tube equipment.
Screen Grids in Audio and RF Modulator Power Tubes Traditionally, the design of audio amplifiers has followed fairly clear and well established design principles. Some of those principles relate to the way in which Screen Grids are used to control current flow in audio amplifier tubes, particularly power tubes...
Speakeasy Vintage Music Manufactures their own line of Class A tube preamps specifically designed for guitar & vintage keyboards
CJLectronics Repair, Modification, and custom jobs on all of your musical electronic equipment.
House of Tubes Library ***GE ESSENTIAL CHARACTERISTICS*** TUBE DATA BOOK, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online!
Sounds In Scale Hand made custom built electric guitars made to customers own specifications from quality tonewoods. Refrets and Repairs also available. Located in North Wales UK.
Trans-ya website How to make transformers. Has great detail (pictures, materials, tools needed, sources, etc.) but website is only in Japanese.
Is Point-to-Point Better Than PCB? by Randall Aiken Which is better, point-to-point (PTP), or printed circuit board (PCB)? You will find manufacturers arguing both sides, some quoting outlandish claims to support their argument, others claiming PTP is much better, then, when they start using PC boards, they claim PCB is better. What is the truth?
Tube Amplifier Theory On this page I will publish some tube amplifier theory. Output transformer impedance calculation is a bit tricky before you get the hang of it. Some useful formulas for calculation of output power, distortion and impedances will also be published. The idea to make this page came up when I bought the Namo Web Editor, which is capable of writing maths (one of the reasons why I bought it)...
AMT North America Inc. U.S. distributor of AMT electronics. Stompboxes and guitar effect pedals from Western Siberia.
House of Tubes Library GE Essential Characteristics, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online.
Is Point-to-Point Better Than PCB? by Randall Aiken Which is better, point-to-point (PTP), or printed circuit board (PCB)? You will find manufacturers arguing both sides, some quoting outlandish claims to support their argument, others claiming PTP is much better, then, when they start using PC boards, they claim PCB is better. What is the truth?
GM Audio Services Limited Amplifier Repair Centre Based in Essex, UK. All Types of amps serviced and repaired. Carriage arranged, all major credit cards accepted.
Langmuir's talk on Pathological Science (December 18, 1953) Symptoms of Pathological Science: 1. The maximum effect that is observed is produced by a causative agent of barely detectable intensity, and the magnitude of the effect is substantially independent of the intensity of the cause. 2. The effect is of a magnitude that remains close to the limit of detectability; or, many measurements are necessary because of the very low statistical significance of the results. 3. Claims of great accuracy. 4. Fantastic theories contrary to experience. 5. Criticisms are met by ad hoc excuses thought up on the spur of the moment. 6. Ratio of supporters to critics rises up to somewhere near 50% and then falls gradually to oblivion.
Getting rid of Self-HUM in guitar tube amps One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
www.jazz-guitar.com Statler pick-ups, the De Armond 1100 "Rhythm Chief" replacement pick up. Floating, specialy designed for arched top jazz-guitars, suitable for left- and right handed guitars, gold or nickel.
marshall law great guitar and amp forum with archived info on amps, guitars, mods and more
Technical books online! 831 megabytes and growing! Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
Mike Soldano Tech Article What's the difference between a Series & Parallel effects loop? Point to Point vs Printed Circuit Boards? Tube vs Solid State Rectifiers? Class A and Class A/B?
GM Audio Services Limited Amplifier Repair Centre Based in Essex, UK. All Types of amps serviced and repaired. Carriage arranged, all major credit cards accepted.
AMT North America inc. U.S. distributor of AMT electronics. Stompboxes and guitar effect pedals from Western Siberia.
Mike Soldano Tech Article What's the difference between a Series & Parallel effects loop? Point to Point vs Printed Circuit Boards? Tube vs Solid State Rectifiers? Class A and Class A/B?
AMT North America inc. U.S. distributor of AMT electronics. Stompboxes and guitar effect pedals from Western Siberia.
Mike Soldano Tech Article What's the difference between a Series & Parallel effects loop? Point to Point vs Printed Circuit Boards? Tube vs Solid State Rectifiers? Class A and Class A/B?
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
House of Tubes Library ***GE ESSENTIAL CHARACTERISTICS*** TUBE DATA BOOK, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online!
VALVE MICROPHONICS The construction of a valve is not a completely rigid structure. Any relative movement of the various electrodes not only affect inter-electrode capacitances but also variations in current and mutualconductance. Such relative movements can be caused by vibration, such as sudden knocks or even ambient sounds. Mullard presented the results of an investigation into microphonics in valves which it published in two articles that appeared in the November 1962 issue of their publication "Mullard Technical Communications". A summary of their findings follows.
Electronics-related (cross reference) Cross-reference and simple data for Japanese transistors. Includes cross-ref info for some obsolete types such as 2SB prefix PNP Germanium transistors.
AMT North America Inc. U.S. distributor of AMT electronics. Stompboxes and guitar effect pedals from Western Siberia.
Sounds in Scale Trevor Usher Hand made custom built electric guitars made to customers own specifications from quality tonewoods. Refrets and Repairs also available. Located in North Wales UK.
TECHNICAL BOOKS ONLINE-- NOW 1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
HAS Sound Custom guitar controls and harnesses. It's ALL about the tone!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
Is Point-to-Point Better Than PCB? by Randall Aiken Which is better, point-to-point (PTP), or printed circuit board (PCB)? You will find manufacturers arguing both sides, some quoting outlandish claims to support their argument, others claiming PTP is much better, then, when they start using PC boards, they claim PCB is better. What is the truth?
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
The Soul of Sound page Hi-Fi oriented. "The Hidden Harmonics behind THD", "A Tiny History of High Fidelity", "Building a Better Capacitor" articles, "Getting the most out of Vacuum Tubes" (1960) book scan and more...
Musical Instruments Supplier A professional China supplier of Guitars, Guitar Straps, Guitar&Violin Bags/Cases, Guitar Strings, Bags/Cases for Wind Instruments, etc.
Index of /tdirstein/Tubes/ good reference site for older EL34 tubes. Shuguang, Matsushita, Mullard, Philips, Siemens, Svetlana, Tesla.
VALVE MICROPHONICS The construction of a valve is not a completely rigid structure. Any relative movement of the various electrodes not only affect inter-electrode capacitances but also variations in current and mutualconductance. Such relative movements can be caused by vibration, such as sudden knocks or even ambient sounds. Mullard presented the results of an investigation into micrphonics in valves which it published in two articles that appeared in the November 1962 issue of their publication "Mullard Technical Communications". A summary of their findings follows.
Ziegler Pickups The Pickup Calculator The first program, Pick-Up Calculator, (see fig. 1) was designed to calculate pickup resistance, and number of winds based on bobbin dimensions and wire diameter. This tool really only comes in handy when you are trying to design a custom pickup, or when you are designing something innovative. When I make pickups, resistance and the number of winds are just two of the main variables that I pay attention to. This tool helps to give me an estimate of what the pickup might be like when I build it. This program has saved me from making a few poorly designed pickups...
Electronics-related (cross reference) Cross-reference and simple data for Japanese transistors. Includes cross-ref info for some obsolete types such as 2SB prefix PNP Germanium transistors.
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
TECHNICAL BOOKS ONLINE-- NOW 1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
How to Solder - for Beginners and Experts Soldering is a mysterious process, at some level even to metallurgists that study it for a living. We know a little bit about how it works, and a few Rules to make it work most (99.99999%) of the time.
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
VALVE MICROPHONICS The construction of a valve is not a completely rigid structure. Any relative movement of the various electrodes not only affect inter-electrode capacitances but also variations in current and mutualconductance. Such relative movements can be caused by vibration, such as sudden knocks or even ambient sounds. Mullard presented the results of an investigation into microphonics in valves which it published in two articles that appeared in the November 1962 issue of their publication "Mullard Technical Communications". A summary of their findings follows.
TECHNICAL BOOKS ONLINE--831 MEGABYTES AND GROWING! Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
House of Tubes Library GE Essential Characteristics, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online.
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
Technical books online! 831 megabytes and growing! Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
Getting rid of Self-HUM in guitar tube amps by JC Maillet One can interpret early guitar tube amp architectures as examples of "mixed-signal" analog systems ... there we find the presence of up to three types of signals occupying the same platform: (i) signal frequencies from the guitar (ie. above 100-Hz or so), (ii) LFO signals (less than 5Hz) from the Tremolo circuit and (iii) 60-Hz or related hum coming from the power supply and filament circuit (a fixed frequency of 60-Hz and possibly its harmonics such as 120-Hz). Indeed, we're dealing with a mixed-signal system involving three frequency ranges of AC energy. Old vintage equipment is often synonymous with HUM and musicians have been forced to accept this as part of the technology. As it turns out, with proper recognition of the basic principles and through simple execution it is possible to pretty much eliminate all instances of hum in any old tube amp !
Mike Soldano Tech Article What's the difference between a Series & Parallel effects loop? Point to Point vs Printed Circuit Boards? Tube vs Solid State Rectifiers? Class A and Class A/B?
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
How to Solder - for Beginners and Experts Soldering is a mysterious process, at some level even to metallurgists that study it for a living. We know a little bit about how it works, and a few Rules to make it work most (99.99999%) of the time.
TIPS TO TEST AND DISCHARGE CAPACITORS Keep them cool! The electrolytic capacitors can't stand heat. It causes them to dry out... Care, feeding and storage of capacitors Electrolytics have a shelf life. Electrolytics can dry out on the shelf even though they were never used/turned on even once... Equivalent Series Resistance- an important parameter of a capacitor ESR (Equivalent Series Resistance) represents the effective resistance resulting from the combination of wiring, internal connections, plates, and electrolyte (in an electrolytic capacitor). The ESR may result in totally incorrect or unstable operation of devices like switch-mode power supplies and deflection circuits in TVs and monitors. As would be expected, electrolytic capacitors tend to have a high ESR compared to other types - even when new. However, due to the electrochemical nature of an electrolytic capacitor, the ESR may indeed change - and not for the better - with time...
House of Tubes Library ***GE ESSENTIAL CHARACTERISTICS*** TUBE DATA BOOK, GEC Linear Amplifier Design, Machlett Manual, RCA Guide for Transmitting Tubes, and the Tube Family Tree book scans online!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
www.jazz-guitar.com Statler pick-ups, the De Armond 1100 "Rhythm Chief" replacement pick up. Floating, specialy designed for arched top jazz-guitars, suitable for left- and right handed guitars, gold or nickel.
TECHNICAL BOOKS ONLINE--1,043 MEGABYTES AND GROWING! NEW!!! - Theory of Thermionic Vacuum Tubes, E. Leon Chaffee, Ph.D., 1933, 652 pages - Courtesy of Joe Sousa. Another fantastic vacuum tube text, with lots of detail and math to go with it. Mostly about triodes, pentodes were just starting to be used when this was written. Covers how tubes work in considerable detail, and discusses low-power amplifiers and detector circuits. Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
TECHNICAL BOOKS ONLINE--831 MEGABYTES AND GROWING! Electron Tube Design, RCA, 1963, 943 (!!) pages - Courtesy of John Atwood, NEW - Electronic Transformers and Circuits, Reuben Lee, 1955, 349 pages - Courtesy of John Atwood, Principles of Electron Tubes, Herbert Reich, 1941, 398 pages, Radiotron Designer's Handbook, Third Edition, P. Langford Smith, 1941, 352 pages, plus many more book scans...
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
Q-tuner neodymium guitar & bass pickups Q-tuners are the world's first guitar and bass pickups being powered by neodymium, also known as supermagnets. Visitors can download a HQ 96/48 kHz audio wav demo.
- DIY Audio Hi Fi - DIY hifi audio amplifier and loudspeaker projects include Audio Note Ongaku, Pass Labs Aleph 5, Altec Lansing A5 VOTT and Genesis ribbon and NHT 1259.
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
alt.guitar.amps web page TECH TIPS! Running a DC Fan at 9V or 12V from a 6.3V transformer by Bob Flint, Radio Suppression at the Input Jacks by Danny Russell (Blitz Amps), How to Bias Your Amplifier and Fixing Noisy Pots by Lord Valve plus more great tech tips!
