Re: 7904 - Very Dim Trace

Marian B

On 15.02.2016 06:13, jimmcintyre22@... [TekScopes] wrote:
I don't see that working. The idea was to measure 6.3 VAC that's
floating on -3kV DC.
If you have a few HV caps laying around, built a high-pass with them (a
corner frequency of a couple kHz is low enough), then you can measure
the AC with basically everything (RMS voltmeter, normal scope).

First power on, then connect probe ; depending on the dU/dt there might
be a hefty spike on turn on. Or shunt the output with some back-to-back
Zeners (>30 V).

Cheers, Marian

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