Knight 600A tube tester - Printable Version
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+--- Thread: Knight 600A tube tester (/showthread.php?tid=9614)
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RE: Knight 600A tube tester - mikethedruid - 02-09-2021
My guess would be the obvious, you have an ACTUAL short happening there somewhere. F1rst check the switch itself, then look at every terminal to which that switch connects.