RF transformer Repair

ID: 201577
RF transformer Repair 
04.Oct.09 17:08
0

Ross Hoff (USA)
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Ross Hoff

  While trying to bring life back to a 179 Crosley I found the primary winding of the RF transformer, [ plate to B+ ] winding to be open. Because of the difficulty of finding a replacement, or trying to rewind the open winding, I bypassed the open winding with a 25K resistor at 1 watt , then connected a 500pf capacitor to the plate of the RF Amplifier tube and to the grid of the Oscillator Modulator tube. Easy fix and the radio now plays very well.

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 2
makeshift 
12.Oct.09 09:33

Konrad Birkner † 12.08.2014 (D)
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Konrad Birkner † 12.08.2014

Please post from the relevant model page, not in talk. 

Well, it works, but it is a makeshift solution. If possible a correct replacement should take place (look for a basket case contemporary Crosley chassis).

Good luck !
KoBi

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 3
Repair may be possible 
13.Oct.09 03:01

Joe Sousa (USA)
Editor
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Joe Sousa

Your posts prompted a post from me sharing my experience with untuned RF transformer repair.

Thanks for the resistor tip, just the same.

-Joe

 

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