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From: Reinhard Zwirner <reinhard.zwirner@t-online.de>
Newsgroups: sci.electronics.design,sci.electronics.components
Subject: Question regarding the identification of a component
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Date: Tue, 9 Sep 2025 14:38:54 +0200
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Attention: fup2!

Hello,

In an older power supply unit for GM counter tubes, the high voltage
(max. 1 kV) is generated by a normal push-pull voltage converter
(switching frequency approx. 8 kHz). In the HV filter chain, this

<https://s1.directupload.eu/images/250908/bsg2w6z7.jpg>

capacitor is connected in parallel with the following strangely
marked component of the same size,

<https://s1.directupload.eu/images/250908/62iwvu9p.jpg>

which my Far Eastern multitester identifies as an 8 nF capacitor.
That could well be the case, but why the strange marking? A VDR? What
do you think?

Many thanks in advance for your hints.

Best regards

Reinhard