[R-390] V509 runs hot

[Robert Young]

Hello all again,

I'm on a quest to find the intermittent volume jumps in my R390A and finally got around to getting some of my stuff from my storage space and pulling the radio out of it's cabinet. A list member suggested it may be a cathode to filament short in one of the 5814A's. I find that V509 runs MUCH hotter than the other 5814A's in the IF deck, I subbed another tube for the one that was there and it too got very hot quickly, is this normal? The intermittent is quite difficult to isolate, at first it was constant after warm up, it is now very sporadic and only lasts a few seconds, for ex. it has only occurred twice tonight in about 4 hours. If this question from a beginner at trouble shooting an R390A is beneath you or you think I am wasting band space please ignore it. (I had to add that after my last controversy generating post).

Thanks,

Bob
KB1OKL