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Philco 90
morzh
Odobenus rosmarus
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Posts: 15,811
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
#4

10-28-2014, 09:54 PM
Fields,

Pull the chassis out, try to flex it a bit, see if this affects it. If yes, look for wires touching chassis, like filament wire maybe.

Try to see if the centertap of the B filament is grounded.
Check grounds.

Also try to see if another radio nearby with the same antenna type also hums. If you have a small tranistor radio, this is a good indicator.
(This post was last modified: 10-28-2014, 09:56 PM by morzh.)
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Messages In This Thread
Philco 90 - by fields 100 - 10-28-2014, 09:03 PM
RE: Philco 90 - by Phlogiston - 10-28-2014, 09:11 PM
RE: Philco 90 - by fields 100 - 10-28-2014, 09:24 PM
RE: Philco 90 - by morzh - 10-28-2014, 09:54 PM
RE: Philco 90 - by TV MAN - 10-29-2014, 01:53 PM
RE: Philco 90 - by morzh - 10-29-2014, 04:06 PM
RE: Philco 90 - by fields 100 - 10-29-2014, 04:34 PM
RE: Philco 90 - by morzh - 10-29-2014, 09:08 PM
RE: Philco 90 - by fields 100 - 10-29-2014, 09:29 PM
RE: Philco 90 - by morzh - 10-29-2014, 10:33 PM
RE: Philco 90 - by TV MAN - 11-02-2014, 07:01 PM



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  1. The PHILCO Phorum
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