Quote:
Originally Posted by wkand
What were the leakage test with the neon bulbs designed to do? Are they the same type of test as a grid leak tester?
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The shorts test connects all the tube elements together except for the one under test at the moment. Any short or sufficient leakage lights the lamp. As the switches are thrown into test position and back, one by one, it goes through the combinations of tube elements.
If there is a short indication, the testing is over because the tube could ruin the tester if a emissions test were attempted on the shorted tube. There are some exceptions given in the manual that allow for a dim glow on certain element's short tests on certain tube types due to a normal high grid leakage in certain tubes.