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  1. W

    Problem with AL-80B

    Thanks for your help 73 Gary
  2. W

    Problem with AL-80B

    I do have 5.4V filament voltage. From what i have read it should be no more than 5.25. Pins look fine and are making good contact. In your opinion do you think 5.4 V is high enough to destroy the tube ?
  3. W

    Problem with AL-80B

    I have an AL-80B in which the 3-500Z tube will not light up. HV is showing just under 4000. It worked fine the last time I used it and there was no noise or smoke when I turned it on today. I reseated the tube in its socket with no improvement. Is the problem likely the tube itself ? I hesitate...
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