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montgomery:  ; 25GSE-1555A (25 GSE 1555 A)

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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » montgomery:  ; 25GSE-1555A (25 GSE 1555 A)
           
John Backscheider
John Backscheider
 
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01.Nov.09 14:05

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After initial recapping of this Ward Airline radio, it exhibited signs of silver mica disease.  Attempting my first repair on an IF Transformer, I have some questions which I hope you can help me with

1.  The schematic shows two mica caps but only gives one overall value 250mmf  which covers both.  How can I determine the individual values I should use for my two replacement caps? 120 pf each? 

2. Removing the internal componets to get to the original mica caps, I made a rooky mistake and broke one of the two fine wires that run up the side.  The wire gage is very fine.  Should I solder a replacement length of wire I have available (24 Ga) or is there another way to properly repair this?

Thanks and I hope you can help me. 

Konrad Birkner † 12.08.2014
Konrad Birkner † 12.08.2014
 
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01.Nov.09 15:54

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 Just by trial and error:

 I would install two 120 caps and see if I can tune an IF maximum. If that fails, two 250 caps should do the job.

Good luck!

 

  
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