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Old 22nd Apr 2018, 8:31 pm   #14
Thatvalveguy
Triode
 
Join Date: Apr 2018
Location: Nijmegen, Netherlands (You know from that bridge)
Posts: 35
Default Re: DC heater supply valve tester.

This problem occurs primarily with directly heated tubes, indirectly heated ones are more inclined to short G2 to G1 or G1 to cathode.

At any rate, this is a DC supply, not really suitable for testing directly heated tubes anyway. This is due to the fact that one part of the heater is going to be more positive with respects to the reference.
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