[R-390] Rectifier Stack Replacement

[Flowertime01 at wmconnect.com]

Don,

I had a lot of R390's at Phu Bia. We were on local power at the Tri Bac Power 
and Light Company. Every time they swapped a generator on / off line we had a 
power surge.

We would smoke the ops out of a room full of receivers once a month or so 
when something smoked. 

I changed a few of the selenium bridges in 69 - 70.

More of a problem was running the series regulator tubes into the ground and 
smoking the 47 ohm resistors.

I brought a R390 into the shop once when the selenium bridge was not yet done 
cooking and out gassed some more it when I turned the receiver on while it 
set on the bench.

Roger AI4NI   </HTML>