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I'm not so sure "Mil-Spec" is all the high 'n' mighty its cracked up to be.. R-390As certainly were made to mil-spec standards, but they still suffer from leaky caps, & out of tolerance resistors...maybe not nearly as bad as "civvie" stuff. But maybe the "good" caps weren't around back when, I dunno...But in about all other respects an R-390 is a beautifully made-obviously costly- instrument.
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Benevolent Despot
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