08-15-2013, 02:37 PM
Hi All;
One possibility, but not the only source of Hum.. Is if the Power Transformer circuit, is not filtering good enough, or is wired wrong.. Possibly, too low of a Capasitance, in the circuit, bad choke or not wired in, when subbing resistors for choke the Capasitance is not big enough to overcome the resulting waves in the AC turned to DC..
My Philco 34 power supply for the 137 Volt supply had too low of a capacitor to do its job and so I had lots of hum.. I ordered some new ones in ( got them in yesterday ) and it took care of my Hum problem..
THANK YOU Marty
One possibility, but not the only source of Hum.. Is if the Power Transformer circuit, is not filtering good enough, or is wired wrong.. Possibly, too low of a Capasitance, in the circuit, bad choke or not wired in, when subbing resistors for choke the Capasitance is not big enough to overcome the resulting waves in the AC turned to DC..
My Philco 34 power supply for the 137 Volt supply had too low of a capacitor to do its job and so I had lots of hum.. I ordered some new ones in ( got them in yesterday ) and it took care of my Hum problem..
THANK YOU Marty
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