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simpson: Varistor silicon

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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » simpson: Varistor silicon

Meyer Rochwerger

BR Articles: 115
Schem.: 320
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20.Apr.17 13:16

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? simpson: Varistor silicon

Dear friends, I am restoring a VOM Simpson 260 series 6.
So far everything is going ok, except for the varistor that is shorted.
My question: where can I get a replacement for this since the parts list there are no references on the specifications of it.
It is listed as follows: "V1 varistor silicon 1 110670"
Any help will be welcome.

Meyer

Attachments:

schematics (130 KB)
USA_SIMPSON_260-6_PART2 (93 KB)

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Nikolaus Löwe

D Articles: 183
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21.Apr.17 11:04

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simpson: Varistor silicon

The varistor seems to be a protective device for the meter. Try two standard silicon diodes (like 1N4001) in anti-parallel, that should do the trick. I presume the voltage required across the meter for a full reading is below 0.5V.

Nikolaus Löwe

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Meyer Rochwerger

BR Articles: 115
Schem.: 320
Pict.: 1803
21.Apr.17 13:18

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simpson: Varistor silicon

Yes, I know that the varistor is a protective device for the microammeter, and also thought of employing two silicon diodes to replace it.

But ... I'm trying to get the varistor in order to preserve the originality of the meter.

Thank you for suggesting.

Meyer

83 from 932

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