I have a 12 V powered record player which has a regular hum being fed from the power supply . Not having a pioneer amplifier with 12V out to feed the recorder I picked up a spare parts bin one and fed that in . Not sure of the innards but it looks perhaps solid state
If I use a regulated 12V power supply of the old transformer type there is no hum . Using this flattish box type gives the hum . I Want to use it up, but I know nothing of Audio frequency noise .
Would I put a capacitor across the pos & neg or build in some sort of choke filter arrangement? What are typical values for Audio? I can'tafford to use any resistance as the signal is already minimal . There does not seem to be any amplification in the pioneer player itself.
If I use a regulated 12V power supply of the old transformer type there is no hum . Using this flattish box type gives the hum . I Want to use it up, but I know nothing of Audio frequency noise .
Would I put a capacitor across the pos & neg or build in some sort of choke filter arrangement? What are typical values for Audio? I can'tafford to use any resistance as the signal is already minimal . There does not seem to be any amplification in the pioneer player itself.
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