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46-1209 restoration....very little reception and 60hz hum?
Dustin Beasley
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Posts: 7
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City: Dallas, Texas
#3

11-04-2014, 04:42 PM
(11-04-2014, 04:32 PM)Marsupial Wrote:  Hello Dustin,

I have a 47-1230 - the big brother of your radio. Similar, more bands.

Do you always have a hum, or just in some of the bands? e.g. do you have it in AM and shortwave, plus phono?

On mine, the phono did not work, but its transformer was causing a bad hum. I ended up disconnecting it to restaure the AM and FM radios. I still can't pick up shortwaves, but that might not be a technical problem (no suitable antenna might mean no signal)

you seem to have done a nice job on the recap.


Thanks. Yes it does hum regardless of the phono/SW/AM setting.

Ive checked voltages against a voltage chart that is posted within the schematics. Everything looks to be close to posted voltages, except one of my 7H7s has a cathode voltage reading of 2.4V - according to the chart its supposed to be .7 volts. is this too far off? And if it is what does that mean?
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RE: 46-1209 restoration....very little reception and 60hz hum? - by Dustin Beasley - 11-04-2014, 04:42 PM



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