[drakelist] TR-4 Problems

[Vanmor]

Hello,   I have a Drake TR-4 that I think I have ruined.   Some years ago, a friend at work gave me a TR-4 he bought brand new back in 77. However, he had stored it in his storage room and a mouse had built a nest in it.   Well I cleaned it up and it actually worked !   It would get kinda quirky sometimes. I tried to nutralize the finals one time and that's when my troubles began. It quickly went into self ocillation and burned a 470 ohm resistor going to T10. It had no audio or would not key up the relays. OA2 doesn't seem to light up anymore either.   I gave the radio to another friend who said he knew a guy who could fix it. Well, I got the radio back the other day. My friend never got it fixed.   I would really hate to trash this radio, it worked pretty good when it was working.   Anybody got any ideas where to start ?   Thanks Vance N5HNY