Dumble ODS #183

67plexi

67plexi

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Back in 2008 Shad gave me the information values and voltages it's a skyline EQ high plate 100 watt
my friend Jon at Two Rock we went in on a custom designed power transformers I used a 1968 output transformer from a Marshall Super Lead 100
the hard part was to source the value of pot's used by Dumble I did a few changes on the filter supply I love the sound of the Marshall 1966 JTM/45 100
bright switch 100pf/220pf original went 250pf/500pf middle switch position off sounds like Jimmy Page's 1968 Super Lead 100 250pf sounds like
Jimmy Hendrix 1967 Black Flag Marshall Super Lead 100 500pf sounds like AC/DC on the rock/jazz switch used a three way switch middle position
bypass the tone stack speakers I used 2 x 12 EVM12L at 4 ohms first time I played it on stage it was to loud volume 1 master volume 1
next I built a Dumbleator run through the effects loop works as a second master volume with input and output controls for effects levels
play at bedroom levels with zero sound degradation first tried my Marshall Power Brake sounded like ass to tame the beast Dumbleator wins transparent
next I built a 50 watt version found the high plate values on the clean channel to grainy changed to a mid plate 2k2/135K on V1 Mepco/Electra 1%
1 watt resistors voltages 471 VDC on the plates EL-34 PI 7.4 volts differential pin 1 and 6 V1 and V2 200 VDC at input volume 5 and master volume 2
no need for the Dumbleator the Green Hornet was born combo EVM12L speaker I own 50+ guitar amps nothing compares.

First photo the real #183

#183.jpg

#183 build on the 2 x 12 Mesa cabinet Green Hornet far left in front of the white Marshall Super Lead 100

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Back of my #183 build

183 001.JPG
 
What are the best speakers for something like that? Does it depend on the voicing of the amp. I know the amps Dumble did were voiced specifically for the player. You have an EV in your Green Hornet, and the Mezzabarba has either M20 or V30 Celestions. Is it like a Trainwreck that it would like something like an M20 or H25, or would it like something cleaner like a G12T-75? Or does it revolve around who is playing it, what guitars they play, and how the amp is set up? Especially when going for the Black Flag Hendrix or Page sounds?
 
My 3 Marshall 4 x 12 cabinets are loaded with G12 25 green backs my Vox 2 x 12 has G12 65's sounds great with the ODS 100 # 102 build
I like the 25 watt green backs on the Trainwreck amps and Marshall amps cuts the high end shrill warms up a bit.
on the video posted the low end is flabby EV speakers don't do that or distort makes a honest player out of you
 
I found this interesting Shad Quin builder of the first clone of # 183 poor Shad went crazy nuts
in this video they have Shad's build TKT on the left side and playing the Cobra amp on the right

Gut shot of the Shad built amp other photos of the real Dumble # 183


183 clone.jpg

183 real.jpg

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