[Milsurplus] I came upon a R390A/URR EAC

[KD7JYK DM09]

: The selenium rectifier unit used to supply dc to the antenna relay
: frequently goes west. (In point of fact, sooner or later is it almost
: guaranteed to fail.) When it does, it produces a profound stink.

I blew one once, the stink was terrible.  It smelled of onion, garlic and 
really, REALLY bad body odor.  One of those things you never forget.

Kurt