Thread: Roberts R200
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Old 4th Mar 2012, 10:02 pm   #4
Marconi_MPT4
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Join Date: Mar 2011
Location: Dorset, UK.
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Default Re: Roberts R200

I seem to be forever delayed this week since posting, but following on from John's comment to scrape the enamel unfortunately still resulted in an open circuit reading.

Out of curiosity and armed with a strong light and magnifying lens I eventually discovered there was a problem where the green wires go under the varnish at the top of the ferrite. After judicious prodding a connection could be made. Ah! Retrieved the end and resoldered the green wire to what was a very short stub. The dc resistance measured at the base pins is now approx 1 ohm.

To finish the repair put a dab of PCB varnish to insulate exposed connection.

Steve thanks for the link, it will be useful to follow up if this repair fails.

Cheers

Rich
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