Are Dumbles "based" on any particular amp?

CitizenCain

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You know, in the way that Boogies started from modded Fenders and Marshalls sprang from tweed Bassman amps, are Dumbles based on anything in particular?

I know they have evolved into a unique circuit, but underneath is there a plebeian heritage?
 

Blue Strat

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30,194
Dumbles started out as Fenders but changed radically. The power supply is very beefy with solid state rectifier and lots of filtering and the tonestack is very unique. The design also uses "cascaded stages" to produce preamp distortion. Not completely unique, but not exactly the same as other designs.
 

wichita

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All from General Electric and Fender I think just like everything else including Marshall...right tech guys?
 

wingwalker

Fuzzy Guitars
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6,783
They are indeed based on BF Fender amps...bigger ones like a Dual Showman or a Twin Reverb, however they are changed a good bit in all fairness.
 

Ray Gianelli

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1,343
All from General Electric and Fender I think just like everything else including Marshall...right tech guys?
Quite a few designs were lifted right from tube reference manuals. I believe some Fender designs were. And Marshall started out copying Fender. It could be that the granddaddy of all tube amps is Western Electric :)
 

big mike

Cathode biased
Platinum Supporting Member
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13,288
Yup. Everything is on the western electric and early tube manuals.

But my understanding is also that the D amps were evolved of the fender circuits. I know the Marshalls were.
 

PFunk

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970
I thought that I read once wherer Mr. D coated his circuits in some kind of black epoxy as some type of concealing shroud.
 

Blue Strat

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I thought that I read once wherer Mr. D coated his circuits in some kind of black epoxy as some type of concealing shroud.
This is true. The preamp/tone stack circuits are "gooped". I don't think you'll find these circuits in tube manuals.
 

dspblues

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2,187
The other interesting part of this is that every Dumble was different and tuned for the owner and what they wanted. All the Dumble cloners or Dumble inspired builders probably have a different Dumble in mind when they try to reproduce or build off that tone. So, the ear of the builder is pretty important.
 

CitizenCain

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4,819
Interesting stuff, guys. I was thinking about doing up an amp that has that rich Dumble-style OD but without all the bells and whistles like multi-channels and 3-way bright switches :rotflmao

Or, is that the essence of the Dumble, the almost infinite tunability of the thing?
 

dorianadams

Member
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587
Very loosely speaking on a much covered subject

SSS and Dumbleland..... Ampeg SVT based.
HRM mod= Hot Rodded Marshall EL34 Dumbles mostly
David Lindleys' Amp#1 Hot rodded Black face DR
OD....... souped up Twin Reverb
 

johan

Member
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2,565
How about the rumour that the Overdrive Special has a Tube Screamer built in for it's OD. I've heard this from more than one source, and I know it's not true.
 




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