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Re: Question regarding the identification of a component

From	"chrisnd@privacy.net" <chrisnd@privacy.net>
Newsgroups	sci.electronics.components
Subject	Re: Question regarding the identification of a component
Date	2025-09-10 16:43 +0100
Message-ID	<midkllFgdbkU1@mid.individual.net> (permalink)
References	<mialetF24nnU1@mid.individual.net> <68c0533e$4$10368$882e4bbb@reader.netnews.com> <mibg15F6fc5U1@mid.individual.net> <mid1h5FducsU2@mid.individual.net> <midkbhFhdokU1@mid.individual.net>

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On 10/09/2025 16:38, Reinhard Zwirner wrote:
> chrisnd@privacy.net schrieb:
>> On 09/09/2025 21:12, Reinhard Zwirner wrote:
>>> bitrex schrieb:
>>>> On 9/9/2025 8:38 AM, Reinhard Zwirner wrote:
>>>>> 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
>>>>
>>>> Maybe "41C" indicates the transition temperature for a PTC?
>>>
>>> The part behaves in no way as sort of resistor.
>>
>> Unless it has failed, open-circuit?
> 
> Yes and no. Multitester says: 7,8 nF capacitor. But a capacitor
> should just be open circuit, otherwise it's broken. On the other hand
> I doubt that a PTC/NTC is connected to ground and a 1 kV line.

Sorry, I was still in VDR territory when suggesting open circuit.

Chris

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Thread

Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 14:38 +0200
  Re: Question regarding the identification of a component "Edward Rawde" <invalid@invalid.invalid> - 2025-09-09 12:01 -0400
    Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 22:08 +0200
  Re: Question regarding the identification of a component Klaus Kragelund <klauskvik@hotmail.com> - 2025-09-09 18:19 +0200
    Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 22:15 +0200
  Re: Question regarding the identification of a component Klaus Kragelund <klauskvik@hotmail.com> - 2025-09-09 18:24 +0200
    Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 22:17 +0200
  Re: Question regarding the identification of a component bitrex <user@example.net> - 2025-09-09 12:19 -0400
    Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 22:12 +0200
      Re: Question regarding the identification of a component "chrisnd@privacy.net" <chrisnd@privacy.net> - 2025-09-10 11:17 +0100
        Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-10 17:38 +0200
          Re: Question regarding the identification of a component "chrisnd@privacy.net" <chrisnd@privacy.net> - 2025-09-10 16:43 +0100
            Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-10 19:06 +0200
  Re: Question regarding the identification of a component Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2025-09-09 17:00 +0000
    Re: Question regarding the identification of a component John R Walliker <jrwalliker@gmail.com> - 2025-09-09 18:57 +0100
      Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-09 21:56 +0200
  Re: Question regarding the identification of a component legg <legg@nospam.magma.ca> - 2025-09-12 08:32 -0400
    Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2025-09-13 22:13 +0200
  Re: Question regarding the identification of a component legg <legg@nospam.magma.ca> - 2025-09-12 08:52 -0400
  Re: Question regarding the identification of a component legg <legg@nospam.magma.ca> - 2025-09-12 09:09 -0400
    Re: Question regarding the identification of a component legg <legg@nospam.magma.ca> - 2025-09-13 13:09 -0400
      Re: Question regarding the identification of a component Theo <theom+news@chiark.greenend.org.uk> - 2026-03-01 18:17 +0000
        Re: Question regarding the identification of a component Reinhard Zwirner <reinhard.zwirner@t-online.de> - 2026-03-02 19:36 +0100
          Re: Question regarding the identification of a component Theo <theom+news@chiark.greenend.org.uk> - 2026-03-04 13:04 +0000

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