Restored Philco 46-420 code 121 has slight low pitch hum.

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Restored Philco 46-420 code 121 has slight low pitch hum.

morzh
Odobenus rosmarus

Posts: 15,813
Threads: 553
Joined: Oct 2011
City: Jackson, NJ

#22

03-19-2019, 03:32 PM

Do you have a Field Coil speaker or a PM?
If it is the FC speaker, the schematic shows no bucking coil. I wonder.....
If you plug 500 Ohm 10W (for the test could be 5W) resistor instead the field coil, and use a PM speaker - would the hum disappear?

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.

(This post was last modified: 03-19-2019, 03:38 PM by morzh.)

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Messages In This Thread

Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 06:24 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 08:06 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 08:18 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 08:39 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 08:50 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 09:01 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 10:22 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 10:31 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 12:19 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 10:16 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-18-2019, 10:36 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 10:42 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 11:34 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 11:46 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 03:34 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by OZ4 - 03-18-2019, 10:41 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Jake Blake - 03-19-2019, 08:25 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 11:43 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 01:16 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 03:19 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 03:27 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 03:32 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 04:32 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 05:12 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 11:14 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Arran - 03-20-2019, 01:09 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-20-2019, 08:41 AM

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