Neonlampen voor Philips PM2421 gezocht (Techniek Overig)

door Koos Bouwknegt , Hengelo (Ov), 05.06.2016, 16:47 (3092 dagen geleden) @ wellenkino

Hi Wellenkino,
I once had a Fluke microvolt meter, also with a photochopper. The neonlamps of the dual bar type in this unit were pretty bad, but I could just see that only one of the electrodes produced orange light. This happened because the driving voltage was unipolar, switching between 0 and 100Vdc,always in the same polarity.
I simply reversed the neon connections, which solved the problem, the voltmeter can run now for another 20 years with light from the other electrode.

So, if your neonlamps are of the dual-bar type, and driven with a unipolar voltage, reversing might help you too.

Good luck,
Koos Bouwknegt

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Met buizen in de wolken