Originally Posted by rds
after some playing around it appears that the left channel sonicap is bad. Has anyone experienced this?
If I push on the cap I can start the hissing (which then continues) and if I push it around a bit more I can stop the hissing. It seems like there's a bad connection between the lead and plate.
Surprising for a $4 capacitor
When this has happened to me its been the contact between the caps leads & the PCB... In fact exactly
what you described happened to me a couple times in the build I'm using to roll C4 caps.
Since I'm mounting the C4 under the PCB I could choose to go to a more secure connection spot (e.g. the tube socket pins themselves).
So before you give up on the cap(s) think about firming up their connections. Even if you have to run a jumper or something below board.