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Restored Philco 46-420 code 121 has slight low pitch hum.
morzh
Odobenus rosmarus
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Posts: 15,825
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Joined: Oct 2011
City: Jackson, NJ
#21

03-19-2019, 03:27 PM
A tracer is a simple circuit that has a probe and the speaker for the output.
You poke places along the signal path and listen to it at the probed point. This way you could possibly pinpoint the place where distortion/hum originates or where the signal stops propagating.

Like this one.

https://www.ebay.com/itm/Philco-Model-70...SwlddciZLU
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RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 03:27 PM



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