[R-390] Rectifier Stack Replacement

[Miles B. Anderson, K2CBY]

I bought an early (S/N 1200) Motorola R-390A from Fair 20+ years ago. I used
it for a couple of years with the antenna relays as an active part of the
system. One fine day when I hit the transmit switch there was an almighty
buzzing noise from the R-390A. Turned out that one leg of the bridge went
open. No smoke, no smell -- just no work.

Miles, K2CBY
k2cby at optonline.net