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Old 17th Jul 2006, 11:51 pm   #7
stevekendal
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Join Date: Mar 2004
Location: Kendal, Cumbria, UK.
Posts: 623
Default Re: Whistling Roberts R200

Quote:
Originally Posted by Tim
D.C.C =Dubilier capacitor co.
If these are the little grey ones with rounded ends, these often go faulty too.
I change these as a matter of course too. Some of the later Dubilers were found in 60's and 70's tellys, and weren't much better.
I Well done for finding the fault. Sometimes the old 'scope comes in handy!!
My R200 had loads of dodgy-looking caps, but the real culprit was an innocent looking brownie connecting the aerial coils to TR1 base. With no voltage across it, the little pig was pretending to be a 150 ohm resistor and causing whistling and rubbish sensitivity . You never can tell. Steve.
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