Copland CSA 29 valves bias procedure

[Valerio - Rome]

Hello guys,
Much to my dismay, I seem to be unable to find the bias alignment procedure for my Copland CSA 29.
I am starting to believe it uses a self-adjusting design - lol
Seriously, i can see that it has a couple of precision trimmers on its circuit board, but the relevant adjustment procedure would be greatly appreciated.

I would be extremely grateful if anyone could help

Ciao from Roma

Valerio

[JohnJo]

Hi Valerio

Isn't this a hybrid design with a valve preamp and solid state output stage?

If so I suspect there is no bias adjustment required.

[Ninanina]

I had a Copland CSA28 for many years and the 29 is similar

It is indeed a hybrid amp using a valve preamp and ss output

As far as I remember there is no biasing needed as it's self-adjusting so I don't think I would 'fiddle' with it

[Valerio - Rome]

... and I tought i was being funny when i wrote "...I am starting to believe it uses a self-adjusting design" :-)
Thanks everyone, now i can bid on a matched pair of 6922.

Valerio

PS - I --SWEAR-- I am not going to fiddle with those trimmers