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Old 18th Jun 2021, 6:45 pm   #20
G6Tanuki
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Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,007
Default Re: Unknown valve radio - New old stock

Quote:
Originally Posted by HamishBoxer View Post
I would change the o/put valves grid coupling caps and the smoothing caps if needed and chances are it will fire up nicely.
My 1950s B7G Barker-88 had a triple-capacitor smoothing-can that definitely needed replacement - it went too-hot-to-touch after an hour or so of being powered-up.

The caps from the 6AT6 phase-splitter to the output-valves' grids were probably US-WWII-surplus Sprague 400VW items - opinion varies on these [they're the kind with a dull plated metal body, paxolin end-plates and red printed lettering] - some claim they are paper-in-oil so should be good even after all these years - but I replaced them with modern 630V-working yellow Kemet ones just to be on the safe side.

And I agree - this radio needs to be used, rather than being sat on a shelf to be worshipped like some sacred relic.

"If it doesn't work what's the point of having it?"
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