Same here. Garry said it was gassy tubes, I didn't believe him but tried new tubes anyway. Fixed it. The amount of gas is so slight it doesn't show up on most tube tester gas tests. My TV-7 instructions explain that the gas test is really not a valid test and show up only the most extreme tubes.
Garry has been gone a long time now but I still miss him. We had some private correspondence, he was not only extremely knowledgeable but also a refined gentleman, an all around good guy.
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On 12/30/2024 4:56 PM, Gary WB6OGD via groups.io wrote:
YES, even my 13 tube R-4A had fast AVC with a gassey tube! (only until Garey told me I had a
gassey tube!).
But, the best tubes in an R-4B will still give the too fast AVC.? You can tell if an R-4B is stock by
watching the s-meter on YouTube videos.
73,
Gary
WB6OGD
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
