[R-390] Selenium Rectifier

[Don Reaves W5OR]

I don't recall anyone ever reporting a catastrophic failure of this
rectifier.  Anyone?
 
About two years listmember K2CBY posted this:
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I had the selenium rectifier fail one leg to open on my Motorola Contract
363-PH-54 chassis about 10 years ago. No short, no smoke, no smell. The
symptom was a very loud buzz from the antenna relay and a failure to pull in
completely when the FUNCTION was switched to CAL. I assume the same symptom
would appear if BREAK IN was enabled and the ptt line grounded. The symptoms
of a failed selenium rectifier are so obvious and it is so easy to get to
that I wouldn't bother with pre-emptive replacement.
Miles, K2CBY, Sag Harbor, NY
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Anyway, along with not eating R-390 meters (ala Roy Morgan), you shouldn't
be grinding up used selenium rectifiers as dietary supplements (ala Barry
Hauser).  

Don