I have 2 Pam -1 and One PAM/side hums a little more than I would like. Time to do filter can cap? Does not matter volume up or down. Tried swapping plugs on power supply. Hum Definitely follows Right PAM.
THX
Brian
THX
Brian
3 posters
PAM - 1 Hum one side
bubbasweet- Posts : 95
Join date : 2016-03-14
Peter W.- Posts : 1351
Join date : 2016-08-07
Location : Melrose Park, PA
A constant hum not based on volume typically indicates both filter caps and any other low-value caps (black beauties) on the board(s). Do them all.
peterh- Posts : 1833
Join date : 2012-12-25
Location : gothenburg, sweden
Try 2 new tubes first(best). Or swap between them(fair as one risks a working amp by disturbing it)bubbasweet wrote:I have 2 Pam -1 and One PAM/side hums a little more than I would like. Time to do filter can cap? Does not matter volume up or down. Tried swapping plugs on power supply. Hum Definitely follows Right PAM.
THX
Brian