The tube is slightly gassy. It will work but likely will not last as long.
Tube Tester Mutual Conductance Falling - What it Means?
I just purchased 16 used KT88's and tested all of them in my calibrated Hickok tester. Eleven of them had stable readings between 4700-5600 umhos. Five had readings that started up in the 4600-5000 range but fell to the 3900-4200 umhos range before stabilizing (I'm not sure they fully stabilized, but the falling slowed down a lot).
Can someone tell me what such a falling reading means? Is the tube weak or unreliable or ????. Thanks, Peter
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- 5 posts total
- 5 posts total