Scratcy vol pot

[glasstone]

Hey guys.

I have an old blackface deluxe reverb, the vol pot was noisy, so i´ve changed it to a new good one, but still scrates when turned.

Any suggestions?

Rock

[sgelectric]

Rock,
Scratchy "known-good" pots are often caused by DC voltage.
Check for DC... If found, check the 3 upstream coupling caps in the tone stack for leakage....Any significant DC can cause your problem.
Hope this helps.
SG

http://www.webphix.com/schematic%20h...b763_schem.pdf

[glasstone]

How must DC would be to much.

[Enzo]

Pretty much - any.

[tubeswell]

See Fig4-4 P 57 of the attachment for how to test for leaking coupling caps