Four 6L6s on a Super Reverb Type Circuit?

[Fischerman]

Derek Trucks has played a Super Reverb in his band for years (probably has used others but it seems the SR is 'his sound'). Gets a great tone from them.

[renshen1957]

My friend knows about Dumble, and he would love to have something like a Steel String Singer. Unfortunately, if there are schematics out there, I am not privy to them.

Hi Steve,

Your friend likes amps with loads of headroom that play clean and loud if he is into SRV.

Besides checking out the Dumble forum (SSS schematics just aren't going to happen), you might check out some bass amps and change the signal caps and the caps in the tone stack (or use a James/Baxandall) to a guitar range.

Another train of thought, Traynor had some good clean (and yes loud) amps back in the day, and so did Garnet (frequently he used either 12AU7s or 6SN7 in the PI). Any of the current Hammond transformers have an equivalent to his factory custom orders (also from Hammond. were used Traynor. You would have to check with Gar Gillies son as to what was used by Garnet.

Both companies used negative voltage (from the Bias voltage) on G3 (Pin 1 on the above tubes) to linearize the tube. Traynor used the North American brother of the EL34, the 6CA7 with about 520 Volts on the plates in his later Bass Master family, A 6CA7 leans toward 6L6 than than the glassier EL34 to my ears.

A close relative to the Fender Twin by Traynor was the YGL Mark 3, and it had lower plate voltages so easier on the pocket book for capacitors.
http://www.webphix.com/schematic%20heav ... gl3_3a.pdf

A KT77 has more headroom than EL34, too, both the KT 77 and the 6CA7 have been re-issued by JJ, the 6CA7 by others, too. A 6550 might be an alternative, too. You wouldn't require four tubes with any of the above to have more power, however 4 tubes might be the sound he is looking for (a pair of 6CA7s with either a pair of 6550 or KT77) depending on his taste in tubes.

I prefer a mix of 6CA7 with NOS 6V6 (or the new re-issues that can stand the higher plate voltages), however the 6V6 will start to break up earlier than he might like.

Best Regards,

Steve

[The New Steve H]

I'm trying to get him to test drive some amps. We'll figure it out.