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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)

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



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