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TV-7 tube tester line adjustment problem

Hi, I have a TV-7 tester that I acquired 4 years ago, and today it shows a line adjustment problem. The meter needle can only reach 30, even I turn the line adj. control to the maximum level.

Given that the 5Y3 tube was replaced 2 years ago (when it wore out) and the 83 rectifier tube has been in its position for roughly 10 years, I suspect that the 83 rectifier tube may wear out as well; but unfortunately, I do not have another tester that allows me to test these tubes. Also, I am rather reluctant to send my tester to the technicians, as I will have to wait for weeks or even months to get my tester back.

My question is: could a weak / bad 83 rectifier tube cause the line adjustment problem? If so, I may buy a brand-new 83 rectifier tube to replace the old one, and see what will happen first.

Best regards,


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Topic - TV-7 tube tester line adjustment problem - Richard.Sun 10:00:19 07/03/12 (12)

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