14-09-2018, 06:18 PM
Sound advice there Jeffry, of coarse, it is a Parmeko design.
The photos here are of the other amplifier, it looks newer than the other and has glass base output valves.
I tried this one and it was quite distorted, I have changed the coupling capacitors and now its sounding sweet again.
This amp has a seperate bias supply of about -33V, one grip was at -15V due to the leakage.
The three capacitors are visible in this photo taken before the change.
There are some schematics on the interweb of a similar design but I cant find the same one.
The photos here are of the other amplifier, it looks newer than the other and has glass base output valves.
I tried this one and it was quite distorted, I have changed the coupling capacitors and now its sounding sweet again.
This amp has a seperate bias supply of about -33V, one grip was at -15V due to the leakage.
The three capacitors are visible in this photo taken before the change.
There are some schematics on the interweb of a similar design but I cant find the same one.
