On 07/06/2017 03:15 AM, frank wrote:
Phil Hobbs wrote:


Maybe Barkhausen oscillation (aka the Barkhausen-Kurtz effect). This
used to show up in old-fashioned incandescent light bulbs that were
evacuated instead of argon-filled.

according to a wikipedia article, the Barkhausen-Kurz oscillator used
triodes. So I'm still puzzled.
I'll try to make a test setup with constant current on a GDT and try
to measure the frequency of the oscillation.

Frank


You can get Barkhausen oscillations in light bulbs, as I said. If you
have a spectrum analyzer, you can find out pretty fast.

Cheers

Phil Hobbs

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Dr Philip C D Hobbs
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