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Restored Philco 46-420 code 121 has slight low pitch hum.
#11

Is C13 in place, new and is 0.2uF as shown? (the L1 is not that important and could even be simply shorted out).
Also is X-cap (should be X-rated, though this won't affect the hum, just safety measure) C15 there and also new (the value is not overly important but should be at least 10nF)

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.


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RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-18-2019, 09:36 AM



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