The Amp Garage

Max

The term taper has been used for a high frequency cut (treble bleed, post-OD. ... Correct: " ... Overdrive Controls: level, ratio, with internal trigger & h.f. taper ..." source: 4th generation classic ODS 100W data sheet.jpg Here's another example (ODS150W #0121) of those four overdrive controls o...

Max

... HAD seemed to have no problem using these transformers ... ("Peavey Deuce") ... in his builds (see #177 below) ... (Thought I’m not 100% sure these are VT Classic transformers in this particular amp) ... https://ampgarage.com/forum/viewtopic.php?p=375696#p375696 5150 / 6505 ... It has 120 watts...

Max

OD-100W #0177 with Deuce OT and PT:

ODS #0177.jpg

discussion: https://ampgarage.com/forum/viewtopic.php?f=4&t=30439

SSS #005 PT?: Roadmaster schematic: https://www.thetubestore.com/lib/thetub ... ematic.pdf

Max

That (Deuce OT in OD-120WR #0137) could be of course. So let's assume that the OT of the OD-120WR #0137 is actually that of the Deuce. What do you suspect in this case in relation to the PT (and the power supply) of the OD-120WR #0137? Or to put it another way - why do you think Alexander Dumble giv...

Max

talbany wrote: ↑Tue Dec 07, 2021 7:35 pm ... let's add it to the list ...

Dumbleland Special 150W with Western Transformers OT (4-8-16 switchable)
Steel String Singer 120W (1986 Price Schedule) with ?
OD-120WR #0137 (left speaker jack 8, both speaker jacks 4) with ?

Max

I don't remember the exact values. But AFAIR they are somewhere between 100k and 150k and their difference is 10k. I also can't remember the exact value of the "Dynamic Balance" control, but based on some other amplifiers, a value of 10k, for example, would seem plausible to me. BTW: AFAIK SSS100W #...

Max

For example SSS #003 doesn't have the same values.

Incidentally, if I were you, A. Dumble's advice would not really matter if I personally liked the results of my own approach better than the results of the procedure suggested by Ampeg for the SVT.

Max

Indeed.

Max

DL 150VG #014 is actually one of the exceptions with the same values.

In my personal opinion, by the way, there is nothing real that could usefully be called "the SSS power section". But that's not the topic here.

Max

I don't remember all the exact values that I have seen in pictures or in person, but as far as I can remember, completely identical values of both resistors are more the exception than the rule. But as far as I know some members here offer commercial replicas of 100W and 150W SSS. So they will pro...

Max

Bombacaototal wrote: ↑Wed Nov 10, 2021 5:50 am ... do you know what was the value of the trim pot for balancing the PI ... ?

AFAIR a usual value for his 150W power amps with an external or internal "Dynamc Balance" control and external or internal test points would be 10k.

Max

... For the steelstringsinger family he took a different approach. ... As far as I know, A. Dumble's advice to adjust the “Dynamic Balance” control in accordance with the corresponding instructions for the Ampeg SVT/V9 power amplifier (method "A" or - without a THD meter - method "B") referred in p...

Max

For comparison:

https://ampgarage.com/forum/viewtopic.php?f=4&t=27806

https://www.jimsguitars.com/s/3887/Ampl ... pecial.htm

Max

...
Items that infringe on trademarks. We typically request that the intellectual property owner provide us with proof of their legal right, but provided they do so, we will remove listings that appear to infringe
...

https://reverb.com/page/prohibited-items-policy#illegal

Max

talbany wrote: ↑Thu Sep 16, 2021 9:32 am ... Is it possible it ... [Max: Dumbleland 300SL] ... 's DC coupled? sure! ...

Thanks for the clarification.

The Amp Garage

Search found 1562 matches

Re: Dumble Bargain

Re: SSS #5 PT?

Re: SSS #5 PT?

Re: SSS #5 PT?

Re: SSS #5 PT?

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: For anyone wanting to set the PI Trim pot

Re: ODR #072 on Reverb

Re: Fuchs Dumble Clone

Re: Dumbleland Overdrive Special!!!