Wilson twin 20 amp

[woody]

Way back around 1972 I picked up a copy of The Audio Armature. Back then they referred to an an amplifier project from a few years earlier called the Wilson Twin 20 at least I think that was the name. Does anyone here have the schematic of that amp ?

 

[llwhtt]

Williamson Twin 20? I should have that issue somewhere, I'll try to remember to look for it this weekend.

Craig

 

[duncan2]

An externally hosted image should be here but it was not working when we last tested it.

 

[woody]

Thank you Duncan I had always wondered about that amp.

 

[Kay Pirinha]

I'm scratching my head about the following:
1 - What were/are the active devices?
2 - TR4's emitter relates, together with TR6's collector, to R15. Does this really replace the Baxandall diode and resistor almost commonly found in quasicomp output stages?
Best regards!

 

[jacques antoine]

More detailed info on the Twin 20 can be found here

 

[OldDIY]

I'm scratching my head about the following:
1 - What were/are the active devices?
2 - TR4's emitter relates, together with TR6's collector, to R15. Does this really replace the Baxandall diode and resistor almost commonly found in quasicomp output stages?
Best regards!

D3 in base