radiomobil: Radio Mobile 922T repair

ID: 521260
This article refers to the model: 922T (Radiomobile Ltd., Cricklewood Works, London)

radiomobil: Radio Mobile 922T repair 
14.Mar.19 00:30
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James Conley (USA)
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Count of Thanks: 2

Can anyone give me some tips on where to start looking for a dead receiver?  Radio Mobile 922 T.  Also, any recomendations for replacement transistors for AF117? 

Thank you.

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radiomobil: Radio Mobile 922T repair 
15.Mar.19 20:19
113 from 899

Michael Watterson (IRL)
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An AC127, or any Russian NOS Germanium PNP on eBay that works up to 60MHz. I used some of the Top Hat style ones in a Hacker RP19 to replace AF117. Also in a Bush. Just ignore the screen connection.

OC170 or OC171 may do, but while not as prone to tin whiskers allegedly some do have the fault. I've not had a problem with them. Same style.

See also the AF117 page

The problem was too much tin inside the case. Whiskers grow in the gel. Methods of "blowing" the whiskers can only be short lived. Not all AF117 production had the problem, but I'd not buy any AF117!

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radiomobil: Radio Mobile 922T repair 
18.Mar.19 13:53
180 from 899

James Conley (USA)
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Count of Thanks: 5

Thank you Michael.  I will keep the forum posted on what I do to repair this 922T.

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