[R-390] R-390 6082 Question

[hackmohr at myfairpoint.net]

Hello All,

A question if you please. Is it likely (or even possible) for a tested good 6082 to still fail in the R-390 voltage regulator circuit? While working on RF and IF alignments the voltage has suddenly gone high to 280V. I've checked all 14 resistors in the VR circuit and they are all good. I've swapped out both 5651 reference tubes and the 6BH6 amplifier tube with no difference. I even moved all the tubes to a spare audio unit and it shows the same high voltage. The only thing I haven't replaced is the 6082's which both test good in the Hickok tester. I've ordered new ones but I feel like I'm missing something. Any other possibiliites?

Mark WA2FXM