Quote:
Originally Posted by rca2000
I never have messed much with mine....I am guessing that cap mounted on the SIDE of the chassis is the one you are talking about. If you can cut the volume totally and do NOT get hum...then it is NOT coming from the power supply I beleive.
Try and ground the phono chassis to the amp chassis--make SURE the ground connection is good between them. This should cut down on hum. Also--make sure all connections to the pickup are clean and secure and have continuity through them too.
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I already redid the positive connection for the cartridge so that I know is good and clean, as for the negative/ground connection for the cartridge I have yet to mess with repairing that connection although the wire is still connected to the connector yet and still has a good clean solder connection, as for the turntable chassis being grounded to the amplifier chassis, I haven't had a chance to see if there's a ground wire going between the two or if it would be possible to connect a wire between the two. And yes the large can cap on the side of the chassis is what I was talking about (its the filter cap for the amplifier) and yes the hum completely goes away when the volume is turned all the way down, so I'm guessing its a ground continuity issue but as to where its at I'm not sure. The only thing I can think of that could be causing the humming issue is that there was a 220k ohm resistor and positive lead from the tuner input jack that were connected on one side to the positive terminal of the phono jack and the other side was just hanging there not connected to anything (which I think it was supposed to be connected to something but not sure where it was connected to because it looks like it broke off of something but as to what I'm not sure.)