Question about Audio Players & Recorders
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Posted on Jan 02, 2017
SOURCE: a/c Hum on r + l + c
The hum noise you are getting it could be producing due to a poor DC filtering due to leaky or dry capacitor(s) in the power supply section.
Pay attention to the biggest capacitors for bulging or leaky conditions.
Let me know if you need further assistance.
Posted on Jul 21, 2008
SOURCE: I have a Stanton T.80
Sounds like we have reached that point where progressive crossover in technologies means that the usual cautions of earth continuity for the tone arm when using a phono preamp has gone the same way as phono preamps on home theatre.
Have you tried switching to the line level and set the mixer up for that level also. That may reduce any gain induced hum. However it sounds like an earth loop problem, where both decks will need to be earthed in the mixer. Check also that all the gear is running of the same power point. Different mains phases are sometimes available near each other, having any gear (power amps also) on a different phase will cause an earth loop problem.
Is the hum all the time independent of the volume levels, or change with levels adjustments and not at all when turned right down. Let me if changing to line levels helps. We can try some more things, like connecting a temp hookup wire earth to the RCA earth to mixer chassis. Cheers
Posted on Oct 04, 2008
SOURCE: have an older sherwood turntable
I had a similar problem and found that manually moving the arm back and forth along the tube several times "loosened up the mechanics. They get stiff after sitting a long time. B e sure to protect the needle!
Posted on Apr 18, 2009
The ground connection on your receiver is simply connected to the metal chassis, so there's nothing that can go wrong with it. You won't have hum problems with any sources other than the turntable because their output levels are higher.
With nothing connected to the turntable input, do you still hear any hum? You shouldn't. If you do, the problem is not because of the ground connection, but because something in the receiver's phono preamplifier circuit is faulty. But if there's no hum, the turntable is responsible. The fault may be in the turntable's output cable. The shield connection may have broken loose from the terminal where it's connected in the turntable. Or your cartridge may be defective.
If your receiver is the culprit, you can see about having it serviced. Or you can purchase an external turntable preamp. Radio Shack sells one, and here's another source. With an external preamp, you can connect your turntable to one of the higher-level inputs (AUX, CD) and avoid the phono input.
Posted on Jan 12, 2011
Testimonial: "Great response and in a short time, too."
You need a turntable with a pre-amp since most new receivers no longer support non amplified turntables. I have the same problem which is why I'd like to fix my Pioneer SX-780 vintage 1978+/-.,
Posted on Dec 18, 2012
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