Re: The "Sussex" Homebrew Valve Tester.
I can't answer your GZ34 question but the Gas test is done in the test position.
As to the Grid Voltage meter reading it is a matter of personal preference whether the meter reads positive or negative. Connecting it as shown in figure 13 it will display a positive reading. Reversing the input connections to the meter will show a negative reading. It won't affect the voltage at the grid.
Keith
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