[Amps] neon indicators

[Peter Chadwick]

W4HBM said:
>Using any sort of indicator in the DC output line is a no-no, and I hope
you mean monitoring the transformer primary.<
And why? Using a SUITABLE set of series resistors and the neon gives a good warning if the bleeders have opened.
The series resistors need to be a potential divider (so if the neon or something opens, the voltage at the neon holder doesn't soar), and rated for the voltage and power.
Not as good as a something like an electrostatic voltmeter, of course - they have the advantage that there's nothing to go open circuit. They also need to be connected the right way round so that the zero adjustment screw is on the ground side.
73
Peter G3RZP