start for a SSS ,help

[grtamp]

ok thanks ToneMerc, but I think that 60V 100mA for bias, is too much low voltage for cathode driver type!

[John_P_WI]

If you need a higher bias voltage you can "reverse" hook up a filament transformer to the 6v supply giving you 120 ac out - assuming the filament transformer is spec'd at 120 in to 6.3 out.

[David Root]

There is also the matter of the internal local negative feedback circuits in the preamp which are a part of probably most SSS circuits, based on my own digging around.

Also the headroom limiting mechanism I have heard of in some undetermined part of I believe the preamp or possibly the PI circuitry is, if true, likely connected with the local NFB in attaining the characteristic singing/sustaining tone of these amps.

General description, I know, not prescriptive detail, but it can inform some possible imaginative development.

FWIW, if you are going to use a 12AX7 as a driver I think you will need at least -130V or so cathode bias but only about 5mA current. Higher current drivers eg 12AT7, 6CG7, 12BH7 would need more current I think. I bought a small transformer that can provide -175V bias with a FWB rectifier from 120VAC secondary. Hammond 262B12. Also has a 12V6 secondary that can run a 12FQ7 driver's heater, which I might try. Andy Fuchs uses a 6FQ7 driver in his Clean Machine.

[grtamp]

this PT can be ok , for run with 4x6550?

http://www.tubeampdoctor.com/en/shop_Tr ... ns_230V_94

[RJ Guitars]

These schematics have been floating around TAG for a while now. the first two are Rj's musing into the SSS. In this thread:

https://tubeamparchive.com/viewtopic.php?t=7972

People have made amps (longhorn) but are not open with the info. For now the SSS remains a mystery and seeing that no two are alike it will most likely remain so.

Eric

Exactly correct -- The SSS is not simply one design and what I learned was a combination of real info, assumptions, and my own best guess about how I might build this amp. One fact that seems pretty solid is that each SSS was a unique creation built for a specific individual. The limited info from folks and photos that have had an inside look at these amps verify some significant differences between the various builds.

The constants seem to be: Loud clean power, large heavy amps, and somebody famous on the other end of the guitar cord.

rj

[LeftyStrat]

The constants seem to be: Loud clean power, large heavy amps, and somebody famous on the other end of the guitar cord.

rj

Was that a curly cord? And what was the string gauge? LOL.

Honestly, and this might be heresy, just buy a vintage Ampeg SVT head, the tone section is probably superior to the SSS.

And with that head, you'll be able to play Jimmy Page's favorite solo ever:

http://www.youtube.com/watch?v=rBllejn5fVA

http://en.wikipedia.org/wiki/Reelin%27_In_the_Years

[Structo]

The band I was in years ago used to cover that song.

We murdered that solo nightly!