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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 7th Jul 2009, 3:59 pm   #21
benjamin77
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Default Re: Murphy U472 NO FM !

Success.....Now working on all bands. Traced the problem to a cap on the screen of the 10C14. It was one of them horrible litle resistor look a likes rated at 3nf ! Many thanks to all
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Old 8th Jul 2009, 1:09 pm   #22
Hunts smoothing bomb
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Default Re: Murphy U472 NO FM !

Good job Ben! well done, now I would change cap 39 on the screen of the 10F18 if you haven't already as it will break down sooner or later and cause the same symptom. (just out of interest when it happened to me I found that those little caps actually went open circuit which caused instability at I.F.

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Old 8th Jul 2009, 3:58 pm   #23
benjamin77
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Default Re: Murphy U472 NO FM !

HI Lee
Yes your right , when I tested it I to found it was open circuit...! I have also changed the other one as you suggested. It would seem that none of them can be trusted...!
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