Hi all,
I just received a ST-70 to restore that has a Sutherland Engineering solid state board instead of the usual PCB with 7199's. I will be installing a used original board my customer supplied, after recap of course. The SS board is dated 1988, Any opinions on this?

Regards,
Sal

a rare beast... I have one too
but my one is with the optional Bias-Adjust-LEDs

That's interesting.

Looks like the board is missing a transistor compared to DynacoPhil's.

How does it sound?

I never tried the ST-70 with the SS board especially with the transistor missing. I still have that board in a junk pile. Might play with it one decade.

Sal

sound is fine for me, but not my favourite st-70.
My is in need because the builder was a solder magician and did a "good" job making solder mountains instead of joints. He molested the chassis trying to drill out the rivets and additional useless holes... it'll get a new chassis or a good used some day. He also managed to destroy the bias board traces while soldering and I had to free-wire-repair his job. It was working when it arrived, but by mistake I guess.

I believe I ave some reedited datasheets somewhere about which I received with the amp...

http://dl.dropbox.com/u/11055436/Dynaco/Sutherland/Sutherland-Mod_ST-70_pfade_optimiert.pdf