This is one of dumbles most aggressive amps, with remarkable tone, sustain, and harmonic content. In other words, whatever was handy that worked, that worked in that position in the amp, that suited the application, which is kind of the only way to do it. A 1n4007 feeding a tube rectifier does the same thingthe solid state and tube diodes share the voltage load and both diodes become much more reliable. Dumble overdrive special guitar rig, music guitar, playing guitar, audio design, bass. We set out to create an overdrive pedal that replicated all the nuances of the famed amplifier. Hilarious thats cold hey man, john mayer rocks dumbles big time. If you talk to any guitarist you will undoubtably hear the world valve or tube thrown around. Using the axefx ii, zexcoil pickups, pr custom guitar, curt mangan strings, vpicks and bestronics cables. Thanks for dougel34 who helped edit the layout for this build. Instruction manuals and kit build layouts for ceriatone amplification guitar amplifiers and effects loop buffers. Here are the dumble and dumble style amps in the axe fx 3.
Sometimes mr dumble even used the highly prized and rare philips 7581s, which are a hardtofind, superhigh power variant of a 6l6. Three ways to nail the dumble sound on a budget reverb news. Amp voicing rob robinettes car and tube amp website. Hoffman amplifiers tube amp forum, dumble champ schematic. The overdrive special is a tube amp with clean and overdrive. I can say i like it and it will earn a spot on the board im assembling.
It incorporates many ideas that came from people using older versions of the application. Dumble amplifiers information archive courtesy of rob. The dumble overdrive special refers to a specialised range of guitar amplifiers built by alexander dumble during the 1970s and early 80s. Howard dumble added a phase inverter balance control to his tweedle dee. Diy layout creator diylc in short is freeware drawing tool developed with help of a large online community of diy electronics enthusiasts. Dumble heaven amp schematics ods overdrive special steel. For 12ax7s i like rcas in v1, mullards in v2, honorable mention goes to raytheon black plates and rfts, although i had 2 of them go south in one day. Thats a pretty handy little tool even easier than my 1970s radio shack thumbwheel. Dumble amps information archive this dumble amps information archive has been collected and kindly provided by rob livesey. These models amount to general circuit styles and chassis layouts. Video of an original 1983 dumble overdrive special and video of the dude overdrive pedal by j. The cold clipper gain stage is a very useful tool for voicing an amps overdrive tone. Other models in the dumble range include the steel string singer, the dumbleland, 25watt hotel hog, 50watt dumbleman, a 450watt bass amp dubbed the winterland, the modular rackmounted phoenix and the dumbleator the latter being a device to interface his.
The sound and design of dumble amps has inspired a huge range of indepth. Im sure there might be some mistakes so i am going to keep going over it but i. This amp is based on legendary dumble amp model, which has became a cult amp. How to get classic dumble overdrive special tones using. Of course, i inquired as to the price of these special amplifiers. Also be sure to visit the glaswerks forums for questions and answers on the amps the clone project came about as i am a very big fan of robben ford. Dumble protecting his trade secrets, and its a straightforward matter of contract lawyour agreement not to have other people work on the amp is given as partial consideration for the amp itself. For most of the guitar amps you can refer to the original manufacturer guitar amplifiers manual. Valve technology was predominately found in televisions and radios from the mid to the late 20 th century, before transistor technology advanced and. Dumble passes on, theres a less straightforward question whether that provision remains enforceable by his heirs, or whether. Based in santa cruz, california, dumbles origins were repairing guitar amps for the local music community, which led.
Click the link above for tube amp info, schematics, board building information, projects, mods, transformer diagrams, photos, sound clips. Howard alexander dumble 1985 guitar player interview. Building a small rehearsa design and discussion around pcb design that doenst suck. Dumble specs handmade vertical 212 guitar speaker cabinet closed back alnico malaysian redwood overdrive pedal dumbler dumble amp simulator pedal true bypass free 2 day shipping. A comprehensive guide to dumble related electric guitar equipment, including amplifiers, effects buffers, speakers and cabinets. Slightly textured black powder coat finish on palmsanded aluminum surface with a clear iridate coating for corrosion protection on the aluminum.
Arching the eqs frequency sliders into subtle variations of a bell curve has an accentuating effect on the 12. Dumble amps page 8 fender stratocaster guitar forum. The software is fairly limited so it doesnt look as great as the ones you pros upload. The following year, dumble came out with his explosion model amplifier his original prototype still works, which later evolved in the overdrive special. The control layout and sounds of the dumbler seem very similar to what i. Dumble amplifiers information archive courtesy of rob livesey. If you want to help you can to keep the forums alive. And few amps generate as much interest into the minute details of the evolution of his circuits from the original reworking of fender circuits to his overdrive. Fender 6g15 tube reverb unit schematic with signal flow by from fender custom vibrolux reverb tube layout, source vibrolux reverb with dumble mods the amp garage from fender custom vibrolux reverb tube layout, source. The bluesmaster is a dumble style amp that normally has a full extra tonestack in. Dumble became known as a tube electronics master, and his high end clientele. The video on the left is a clip of the sebago amp, played by danny click. If you set it for a big clean sound and engage the overdrive youll be a little disappointed. I did a good amount of preamp tube rolling in my emerald pro, fuchs and dlite.
Dumble tweedle dee mods page 3 telecaster guitar forum. We at ceriatone would be happy to serve your needs, whether you are a diyer, an amp shop, or a boutique amp manufacturer. For minimum distortion a tube should be biased halfway between cutoff when all electron flow is stopped and saturation when electron flow is maxed out. The steel string singer with a built in overdrive special circuit amp within an amp is arguably the best you can get.
Antique amplification dumble 1978 odrs amp origins. Dumble champ schematic tube amp information, guitar amp. If two v rated diodes in series is good enough for. The tubeamp guru offered to let his new client send his choice of covering for the combo, and when matses suggested pythonskin vinyl like lindleys amp, dumble politely explained it couldnt be done. We only have manuals for amps that are our own exclusive designs. I think this is the point you are missingthe likelihood of a tube rectifier failure is greatly reduced by adding a solid state diode. Please visit my tube amplifier forum heres the place you can go to ask tube amplifier questions. Big tex reverb dumbleland special dumbleman overdrive reverb special phoenix steel string singer winterland. Dumble guitar rig, bass amps, vacuum tube, vintage guitars, sabotage. This amp is currently fitted with jj 6l6 gcs, but they were originally fitted with philips 6l6s or groove tube 6l6s. Buy guitar luthier repair tool kit with file set in stainless steel ruler. By contrast, any fender amplifier is much more forgiving, thus allowing you to get away with many more clams. Dumble overdrive special combo, tan,, call for price.
Alexander howard dumble began modding amps in about 1963, and he modded and built amplifiers until he retired in the late 1990s. Heres a layout for the overtone special 50 a dumble overdrive. Tube amp modifications, tube amp mods, valve amp modifications, valve amp mods amp mod heaven i accept no responsibility or liability for the outcome of using any mods listed in this section. Emerald citys dumble is rated at 150 watts, which basically just means that the amp can get very, very loud, and still sound clear. The owner has requested that we assist in offering this fine specimen of alexander howard dumbles early work for sale.
In general, with real dumble amps and with clones, if you get the amp set for great dumble overdrive youll find the clean setting compromised. The sooner you learn to read amplifier schematics the sooner youll be able to analyze classic amp circuits and learn how the masters of amp design voiced their amps. Bluetone odysseus is a real 2channel pointtopoint tube amp, which has a. Since dumble amps all sound different from one anotherits difficult to say if it really sounds like and particular dumble amp. The dumble overdrive special has been one of the holy grail guitar. Thank you for visiting ceriatone, home of quality and affordable guitar tube amplifier. So since i did a layout for the tubeworks i thought to myself if its basically a tube pre amp i layout dumble overdrive special 70s. Pro had 7581s, but i was considering a change to 5881s before selling the amp.
By trying out several different sets of operating conditions in the computer i could eliminate hundreds of possibilities without playing with electricity. The goal is to provide a simple interface and enough power to let the user draw schematics, boardchassis layouts. There are hundreds of pages of tube amp information on my library page. An extensive tour backing buffy saintemarie financed dumbles first out of the backyard and into a building amp shop in 1968, in santa cruz, california. This digital dumble clone is customizable along much of the same parameters that you would find on the front end of a classic dumble amp. Best dumblestyle or dstyle pedals of 2020 compare tone and. What is the best dumble kitclone, if you can only one. Hoffman amplifiers tube amp forum, tweed bluezmeister. Sebago sound is now offering a blueprinted version of the now famous dumble overdrive deluxe amp seen in the video on the right. The tube amp library of information click the link above for tube amp info, schematics, board building information, projects, mods, transformer diagrams, photos, sound clips. Antique amplification has recently completed the full restoration of an impossibly scarce 1978 dumble overdrive reverb special 100 watt.
In 2012, vintage guitar magazine described the dumble overdrive special as the most. Dumble amp schematics schematic heaven, tube books. Infectious disease expert michael osterholm explains joe rogan duration. What tubes are you using in your dumble or your dumble. Seattle guitar shop has worlds most expensive amplifier.
I will never forget the sight of the driver opening the rear door of the truck. The first step in chasing down the dumble drive is to recreate that pregain eq circuit on the floor using a common graphic equalizer pedalsuch as the boss ge7 or a mxr eq of the six or ten band variationbefore a vintage voiced overdrive pedal, like the boss blues driver bd2. The dumble overdrive special is the most difficult to acquire and most sought after amplifier in the world. In the expansive world of modelled and modded amps in the positive grid bias amp desktop is the 67 dumble clean.
Quick reactions are required to tame the dumble animal. Red amps or something like that was given the keys to the kingdom on dumbles whole amp within an amp secret circuitry. Dumble did move the power tube screen grid filter ground to the preamp which is curious. The sound of a valve amp cranked nice and loud is synonymous with rock and guitar heritage. The exalted amps of alexander dumble have been legendary since he. Dumble overdrive deluxe 1979 carter vintage guitars. Dumble electronic schematics, amp schematics, tube amp.
Not sorta like or our interpretation of, but the real deal implementation of the original amp. Ceriatone forums are up and running guests please register note. Galos dumble amplifier, amp demo tone patch youtube. January 06, 2007 be sure to check out attack of the clones the sequel, the latest amp or should i say amps project. Specs wattage 25 watts tubes 6v6 power tubes speaker. As one of the true pioneers of boutique amplifiers, alexander dumble forever changed the tonal landscape of guitars in the 1960s and with. Because of this, dumble amplifiers are the most expensive boutique amplifiers on the used market, and prices have risen rapidly. No, seriously he used only tubes hand picked by dumble himself, regardless of manufacturer. In 1972, alexander dumble was developing a reputation for making unusual tube amps in his. It is used in many high gain tube amps to generate early and smooth sounding overdrive tone. The dumble guide edition 1 2014 by the dumble guide issuu. Nontube amp discussion to discuss music, girls, life, etc. Welcome to the hoffman amplifiers forum may 07, 2020, 02. This legendary overdrive deluxe was previously owned by keith urban.
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