Posts: 16,510
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City: Jackson
State, Province, Country: NJ
Well, so I defeated the hum. The reason was, the backelite block #90 that is 2 Y-caps from both AC lines to the chassis was missing the GND connection. In its turn it was because the insulating base of the soldering post that unites an incoming AC wire with the transformer lead was over the GND lug and it should go under.
Fixed, no hum no more, especially when plugged directly to the wall outlet and not through an isolating transformer, for which a little hum remains, quite normal, all my radios do that.
Woo-hoo!
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.
Messages In This Thread
RE: Philco 16B restoration - by morzh - 11-11-2016, 09:04 PM
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