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Yeah-I've heard tales of R-390As being on 24/7 for years, until a tube went kerflooey. Turning 'em on & off was harder on 'em than just leaving 'em on-R-390s also used a peculiar kind of multi-position microswitch that would arc & "weld" itself "on" after years of wear-I had one do that. Thankfully, I have Terry DeWick 75 miles down the road...<grin>-Sandy G.
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Benevolent Despot
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