Re: Any issues not using ground lead on potentiometer?
I have read the thread and could not find or maybe I missed it but the pot needs to be grounded to the amp. Using the aluminum mounting plate is only adding to your issues. I have been though this exercise several times. Touch a wire to the metal case of the pot and the ground of amp input. See if that works. With issues like this that I have had this has pretty much solved it.
Find a flat metal spot on the pot. Use sand paper to rough the surface up. Solder a wire to it. run that wire to the negative input on the amp. start their.
Also dump the aluminum plate. You are mounting the pot's metal shaft to a metal plate with a metal power input and a possible metal collared 3.5mm input that is not isolated then you will get noise. Anytime I mount a power input with either a pot or 3.5mm line in I always use a plastic plate. I found these from Erse work well and are plastic.
http://www.erseaudio.com/Products/TerminalCups/TC9
http://www.erseaudio.com/Products/TerminalCups/TC-5
Originally posted by tomzarbo
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Find a flat metal spot on the pot. Use sand paper to rough the surface up. Solder a wire to it. run that wire to the negative input on the amp. start their.
Also dump the aluminum plate. You are mounting the pot's metal shaft to a metal plate with a metal power input and a possible metal collared 3.5mm input that is not isolated then you will get noise. Anytime I mount a power input with either a pot or 3.5mm line in I always use a plastic plate. I found these from Erse work well and are plastic.
http://www.erseaudio.com/Products/TerminalCups/TC9
http://www.erseaudio.com/Products/TerminalCups/TC-5
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