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Buzz or hum on station only
morzh
Odobenus rosmarus
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#3

05-04-2018, 08:05 AM
If your power supply is of the switching type, it can, even if producing clean voltages, radiate EMI. When you made it, have you followed standard anti-EMI practices? One way of remedying this would be putting the power supply in a metal grounded box (grounded from outlet PE), and put a ferrite bead (make several turns) around the cable, as close as possible to the box.
This is, of course, if your voltages out of the power supply are clean.
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Messages In This Thread
Buzz or hum on station only - by epdowd - 05-03-2018, 11:56 PM
RE: Buzz or hum on station only - by Arran - 05-04-2018, 02:22 AM
RE: Buzz or hum on station only - by morzh - 05-04-2018, 08:05 AM
RE: Buzz or hum on station only - by epdowd - 05-09-2018, 11:56 PM
RE: Buzz or hum on station only - by epdowd - 05-13-2018, 02:57 PM
RE: Buzz or hum on station only - by morzh - 05-13-2018, 03:45 PM
RE: Buzz or hum on station only - by gregb - 05-13-2018, 06:05 PM
RE: Buzz or hum on station only - by epdowd - 06-02-2018, 10:00 AM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration