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Found some schematics for dumble amps. My friend's planning on building one. I'm sure they sound great. The resistor and cap values different than other amps but not any more expensive. The original creator doesn't make them anymore. The schematics are out there.
Im wondering if anyone has info on Dumble replica, original units, electronics and
wiring. The cumulative knowledge on this forum is invaluable. Thoughts and opinions on upgrading the original platform welcomed.
ideas, suggestions, and pictures of the innards are greatly appreciated.
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05-02-2016 10:23 PM
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Check out Fuchs ODS amps, Andy also does custom jobs where he'll take your donor amp/chassis/cabinet and gut it, replace all pots, caps, tube sockets and hand rewire point to point the circuit and add his ODS on a board. I've owned 2 and have a 3rd now. Monster deal, find one used on eBay or Reverb. The total redo costs $1200.00 plus you donor amp and a 3-6 month wait. Many of these used ODS redo's are around $1100.00.
Right now I have a FUCHS ODS modded Music Man HD130, doggone nice amp. If you want to really get that almost Dumble tone buy one of Andy's amps that he makes from scratch. I think if I was going to buy anther Fuchs it will be one of his ODS 30 watt versions. They sell for $2000.00 used and beyond.
Big
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Check Ceriatone
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If you go to the Weber VST amp building site, there are guys there who have built the Dumble. I've built lotsa amps, but not the Dumble.
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Ceriatone is the best deal going. Nik offers different levels of kits, unassembled, partially assembled, with or without transformers. I don't know whether he still does them but Jon Mernyk of Mill Creek Audio based his builds on Ceriatone kits with his choice of transformers and other components to voice them as he saw fit. Jon is a guitar player himself. Mark Kane is also highly regarded.
You can find Ceriatone's schematics on its website :
CeriaTone.Com - DIY Guitar Tube Amp.
Ceriatone Amplification
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Transformers can be difficult to source, depending on the circuit you intend on building. Appropriate cabinet and speaker are usually needed also. ie Thiele with EV 12S, etc.The resistor and cap values different than other amps but not any more expensive.
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yep, also check out the "telecaster discussion page reissue" forum amp DIY forum, called "shock brothers DIY amps." Lots of experience there.
Originally Posted by Greentone
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If you're not on a Windows machine, just go to the Amp Garage website. Troves of information, schematics, mods there.
You'll get a warning on Chrome about malware but I don't think it's an issue anymore.
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Originally Posted by HeyNow
Yeah, AMP GARAGE, that was the place I used to lurk at years ago before I found out about Fuchs and Andy's work. Great place to learn a lot.
Big
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- HeyNow:
Thanks for the info on Amp Garage, I'll give it a look.
- Jabberwocky:
My friend undertaking the project, Andres, had seen the
Ceriatone site. I think that may've been what initially sparked his interest.
- BigMikeinNJ:
The Fuchs 30 Watt, what amps would you consider similar?
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I'm looking for any schematics or diagram related to any Dumbles, kindred products, or related amplification devices. The OP weren't the inquiries that needed asking. After my comrade and I spoke briefly, I realized the basic question hadn't been clearly verbalized. My friend Andres is looking to disassemble a variable wattage Carvins hardware, and work-out the issues while stumbled upon. Diagrams you kind 'jazzguitar' members could share, through link or PM, would help immensely.
Money is an obstacle, and a tertiary reason why Andres wishes to concatenate the amps numerous pieces for himself. We are after new challenges. Seeing the culmination of one's diligence, resulting in an extraordinary and useful musical contrivance, in which all can feel satisfaction. Knowing all your shared expertise brought about learning. With faith and hope, causing almost unending beauty embodied in guitar tones: coaxed from the potentially illusive, Dumble pseudo-facsimile. Now, my general amp circuitry knowledge is limited. Andres has a voracious appetite for the subject matter, accumulating and applying his ever increasing knowledge daily. Definitely a difficult road ahead. Regardless, I believe our efforts will be worthwhile.
Anything anyone thinks might help, please do share. No matter how basic, please don't hesitate. Though I don't post much to our forum, I carefully browse, collect, & utilize exceptional materials many of the forum members dispense daily. I believe worth-while this journeys: if done exuding great passion while pertinaciously pursuing ones love of life's joys. Being drenched in music is my passion. I love when it's organic, raw, for lack of ability to communicate the proper description.Last edited by Fortune; 05-11-2016 at 08:34 PM.
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Once again thank you all.For those reading my confusing banter, I hope you'll accept this proclamation of positivity.
I pray for all jazzguitar.be forum members, and browsing guests, to receive these blessings:
I pray that for the rest of time given to each one of us,
great prosperity, health & joy envelops our spirit, soul, & flesh.
In the NAME above all NAMEs. Amen.Last edited by Fortune; 08-11-2016 at 03:41 PM.
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Originally Posted by Fortune
Now that has to be the nicest thing I have seen on any forum ever. Thank you.
I have never played any other Dumble clone type amps. I have had 3 Fuchs modified amplifiers. This last amp I bought, the Music Man HD130 modified by Andy Fuchs, is the loudest amp, even at half power. Now the guy I bought it from was pretty picky and he's been around the full Fuchs ODS amps, and comparing it to his modified by Andy Fuchs amp he said this: my Music Man is about 4/5 of what a FUCHS ODS amp is in terms of tone and flexibility. I believe him. My next amp will be a Fuchs 30 watt ODS, there's a couple floating around for sale now at around 2k. Later this year I'll be getting one of those. They use essentially the same tube compliment of a Deluxe Reverb, which is my all time favorite amp. There's plenty of video clips of the 30 watt ODS amps on YouTube.
As for comparing the 30 watt ODS to the others I have no side by side experience and any comments in that regard would be pointless and inaccurate. Listen to the clips on YouTube.
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I like Dumble cleans but I like blackface cleans or polytone cleans more.. Dumble cleans are excellent but not necessary jazz oriented. If you have a chance try a Fuchs or a Two Rock to give you an idea - you might get even more excited or avoid a disappointment
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OP What is your goal in building a D-Clone? If your goal is to get a D-Style amp then I would recommend Ceriatone (great prices & global shipping), if your goal is to learn how to build amps then certainly look into building amps but a D-Clone is not the place to start, try a tweed amp first - something like a 5F1 Tweed champ or 5E3 Tweed Deluxe are great places to start. Weber sells kits for a reasonable price (Tweed is a simple circuit, Blackface Fenders with tremolo or reverb can be tricky to diagnose on a first build).
When you get into high gain, like a Dumble, things like component layout, grounding and lead dress (how the wires are laid out) become very important. There's AC voltage, DC voltage and magnetic fields in an amp and a high gain circuit can pickup interference from these as noise or oscillations. Tracking these down can be frustrating as you could spend hours with a wooden stick moving wires a little to the left/right trying to find the source of the interference.
Other things like sourcing quality parts can be some work, but also sourcing a circuit board, chassis and cabinet can be difficult and expensive. Making your own circuit board, chassis and cabinet is possible, but it's a lot of work.
My intent is not to discourage you, tube amp building can be a lot of fun and very rewarding. If you decide to build an amp look for an amp kit from a company that provides support or has a good forum of active amp builders who can answer your questions.
If you give it a try let us know how it goes, hopefully someday we'll be saying "Dumble who? I play a Fortune" (On second thought you might want to pick a different name as amp building genius Jim Kelley's first amps were called "Fortune" amps).
On a final note: THERE ARE LETHAL VOLTAGES IN A TUBE AMP!!!! READ UP ON SAFE PROCEDURES FOR WORKING ON A LIVE AMP, ALSO READ UP ON DISCHARGING ELECTROLYTIC CAPACITORS. WE WANT TO SEE YOU BACK HERE !!!!!
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Max Twang is being VERY wise. I have built many tube amps in my time--everything from less-than-5f1 style mini-amps, to high-gain, ear crushers.
(1) Tube amp building isn't your digital electronics shop class in high school. The voltages in working with tube circuits are definitely lethal. You cannot let your attention stray, or you will have no attention at all.
(2) Some of the best, clean, jazzy circuits are a joy to build because layout/lead dress is less complicated, given that the preamp gain levels in the circuit is low enough to make it comparatively uncritical...comparatively.
(3) When you are building high-gain amps--e.g., Boogies, Dumbles, some Marshalls, and Soldanos--layout and lead dress is super critical. It is not just a matter of wiring things up correctly--it is a matter of getting things in correct relation to each other--an inch here, a wire crossing a circuit over there--and you have a humming, thrumming boat anchor, not an amplifier, that just oscillates uncontrollably.
(4) It is best to work up to building a high-gain, multi-stage preamp amplifier by building a couple of amps that are less critical, first. I would not recommend a "Champ" amp because the chassis is cramped to the point of being off-putting. The best entry point is the "Deluxe." Easy to build (if you obey strict safety protocols), it is a great sounding circuit for virtually all sorts of music. From there, you can build a "Bassman," which is more involved and is the launch point for virtually all, modern high-gain amps...though it is not itself high gain. After that, I'd say you are good to attempt a high-gain amp.
(5) Skipping a step is apt to prove very frustrating in the long-run...or even apt to preclude a long-run, if you zap yourself.
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Well as promised, I am reporting back on my new build. Here's the AmpMaker Dual Six:
This amp is a low-gain, clean-oriented design with a broad variety of clean, quiet options. It's perfect for home or office. There's also a "boost" switch which brings it up to jazz-trio volumes and perhaps beyond.
OP, this is a relatively simple build with very clear directions and a rigorous 78-point cold/warm/hot test-and-debug script. It's so different from scratch-building a high-gain ultra-tricky Dumble that it's kind of funny to think about that. But there's a lot to say for spending 20-30 hours slowly building, run the tests, hit the switch and go play. And yep, that happened here!Last edited by Sam Sherry; 05-12-2016 at 09:56 AM.
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Well done, Sam! How's it sound?
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Here is the main board of a ODS-HRM under construction, the finished amplifier and an original. Lots of wires to keep track of during assembly.The ODS-HRM tone is not everyone's cup of tea. It is not the circuit used by either Larry Carlton or Robben Ford. It is not the same one they copied for the Ceritone Overtone HRM either. The one I copied used EL-34s, Marshall transformers and Marshall tone stack. I usually do uncommon stuff.
Last edited by icr; 05-11-2016 at 07:11 PM.
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A big thank you to all.
I've been shocked by an amp before,
and realize how awful it can be.
I'll certainly proceed with caution.
Really digging the pictures.
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You're nice to say. My main amp is a Weber kit and it was not an easy build. It was fun to have instructions this time! Originally Posted by citizenk74
I had it out with the ES-330 at lunch today for maiden voyage with guitar / DB / drums trio. It was thin, so tonight I was back at it. Crap! I was playing 6L6s with my bias-switch mod set to the "6V6" setting. The power tubes were running around 40% bias . . . yeah, it sounded thin. Click -- yeah, that's better! Originally Posted by citizenk74
How's it sound?
The key to using this amp in a trio is using the Boost switch and finding a sound with the mid knob and the fat switch. Without the boost-y thing this amp is pretty quiet, good for practice and duos.
That sounds like damnation by faint praise but it's not. My wife and kid are pretty happy that I built a quiet amplifier. When volume is needed I've got the Weber 6A14HP, a 35-Watt Princeton Reverb.
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