10-07-2020, 07:19 AM
Hi fella's,
Have a question about my newest tube tester.
It is a Hickok model 539A.
Has a line adjust control which has a test mark on the voltage meter at 100 volt mark.
When testing tubes, should it be set at the test mark or at 120 volt mark?
murf
Have a question about my newest tube tester.
It is a Hickok model 539A.
Has a line adjust control which has a test mark on the voltage meter at 100 volt mark.
When testing tubes, should it be set at the test mark or at 120 volt mark?
murf