If I remember correctly it was something like that. The counter had to be very close to register clicks, such that it was consistent with alpha particles, but it was not stopped by a peice of paper, which would have stopped alpha particles, but which would allow through a voltage transient.

Nigel

On 23/04/2017 17:53, Eric Walker wrote:
On Sun, Apr 16, 2017 at 11:56 AM, Nigel Dyer <[email protected] <mailto:[email protected]>> wrote:

    It worked quite succesfully for a couple of days experiments,
    during which I found that the high dV/dT it generates causes false
    positive clicks on my cheap geiger counter.


What was the approach you used to determine the clicks were false positives? E.g., interposing a thick piece of metal?

Eric

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