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In the Forum: Analog Playback
In the Thread: The last phonocorrector: “End of Life" Phonostage

Post Subject: If you dont want to hear the bell...Posted by N-set on: 11/29/2011

...you either damp it or not kick it at all.
The symptoms suggest that what kicks my bell is my PS-rotating it changes the hum from strong to no audible.
I don't have a desire to go into DIY details but I have no better ideas at the moment on where the hum comes from.
I'd love to believe that there is a loop somewhere.
I've done all your procedures with shorting all the grounds and shorting the stages.
Shorting the grounds gave absolutely nothing and I cannot imagine where the fuck I should have a loop???
Shorting the stages kills the hum when I short the plate of the second stage (not the grid, but exactly the plate).
So my loudest bell is the output of V2/input of V3. I tried to find any loops round there, changing wiring, changing Holco to Dale
etc but no result (the hum has less HF and is more regular with Dale). What am I left with? Shield and proceed?

Cheers,
N-set

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