[vcf-midatlantic] FS: Non-Linear Systems X-2 Nixie Meter
sentrytv at yahoo.com
Mon May 9 23:22:20 UTC 2022
I have one of their multimeters!
My extremely complicated, hand held electronic device.
> On May 9, 2022, at 7:19 PM, Chris Fala via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:
> Anyone here bidding on this? If so, I will hold off.
>> On Mon, May 9, 2022 at 5:26 PM Jonathan Chapman via vcf-midatlantic <
>> vcf-midatlantic at lists.vcfed.org> wrote:
>> I don't usually post about test equipment here, but this one is made by
>> Non-Linear Systems, so I figured there's enough overlap that folks might be
>> NLS is probably better known for the Kaypro series of computers, but they
>> invented the digital multimeter back in the 1950s! Their first unit was an
>> electromechanical beast, using stepping relays and edge-lit numerical
>> displays. This is of course a later model, and is fully solid state, with
>> Nixie tube displays.
>> I went through the meter around three years ago, replaced a cap in the HV
>> supply for the Nixie anode voltage, reformed the logic and analog supply
>> caps, and cleaned up a previous repair that was causing excessive leakage
>> on the 1000V range. A basic calibration was done following the manual,
>> using a Fluke 343A DC Calibrator and a calibrated Fluke 8842A. Three years
>> later, it's still holding calibration!
>> Anyhow, I'm letting it go as I don't use it much, I have a number of Nixie
>> meters, and though this one is both very nice and historically significant,
>> it's DC-only. The option boards for AC and ohms conversion are not present.
>> The schematics are available, and it'd be possible to recreate them on
>> protoboard with the appropriate Elco connectors.
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