Posted by Vincin (A) on March 09, 2006 at 03:16:00

In Reply to: My PQ kit 1 is done... posted by Vincin on March 6, 2006 at 07:03:28:

Anyone have any experience with the cathode caps on the 6SN7 and 5687?

According to the schematic, the blackgate caps are 100uf/10v on 6sn7, and 220uf/16v on 5687. The caps I receive (also same on the manual) are different: 220uf/16v for 6sn7 and 470uf/16v for 5687.

My friend thinks that the gain maybe too high (which is causing the cracking noise/ distortion etc.), so we took out the 220uf/16v on the 6SN7 completely (=reduce gain) - distortion is gone.

Any thoughts? What caps do you have in your amp?

And I seem to have been able to fixed the power supply board also, no more hum.

So the amp is cranking out good music, but I currently need to turn the volume over the 12o' position as there is less gain.

Some people has mentioned this and its true - making it work is half the fun! Im beginning to get hold of how this thing work and have learned a great deal about electronis during the past few days.

Thanks - Vi