[TenTec] astron blows regulators

[Clark Savage Turner]

Curious, I have an RS-35M that keeps blowing the regulator, but it does 
it after some time of operation....like a day, sometimes a few weeks, 
then it goes out, supply shuts down.  At first I suspected the little 
regulator voltage pot, it is cheap, so I shot it with DeOxit and wiggled 
it, put a new regulator in (the thing is socketed from the last owner, I 
suppose this has been happening for some time!) - it worked for a couple 
of weeks, powering transmit / receive cycles just fine.

There isn't much on the board, I can't see what could be killing the 
regulator in there.  I will replace the pot just for good measure (it 
acted dirty when I set the voltage), but does anyone have any other 
suggestions?  Ever see this problem?

Clark
WA3JPG