Posted by Forty2wo [ 70.110.191.141 ] on March 13, 2005 at 20:03:12:

Just kidding.
I got Gunievere pretty much sorted out.

First the major hum, while I was in there adding the grid stoppers I killed one of the CCS's. My guess is ESD. Thank you Colin for the spares!

Next; back were I started, hum that increases with volume them stops at max. After a bit of pokeing around I found that in my case, the body of the Radio Shzck pot needed to be grounded. Dispite the fact that can find no leakage even with my best meter. Go figure.

Now it is pretty quiet. There is still some hum with volume but considering the amount of gain and the fact I removed the sheilding troble shooting the pot, it will do untill I change to a lower gain tube...John

Replies:

• Grid stoppers - colinhester 21:45:27 03/13/05 (3)
  • Re: Grid stoppers - Forty2wo 23:15:37 03/14/05 (2)
    • Re: Grid stoppers - colinhester 23:14:31 03/15/05 (1)
      • Re: Grid stoppers - Forty2wo 17:20:59 03/16/05 (0)
• Re: throw another preamp on the fire, boys! - manualblock 20:13:36 03/13/05 (2)
  • Re: throw another preamp on the fire, boys! - Forty2wo 21:22:02 03/13/05 (1)
    • lower mu... - Tnuctipun 06:05:33 03/14/05 (0)