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Discussion of precise voltage measurement

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Re: [volt-nuts] Vref for Fluke

DM
Dick Moore
Tue, Apr 9, 2013 8:30 PM

Hi Mike -- my old 332, since sold, had an ovenized version of the combo transistor and Zener. Myself, I would use a 399 and put a little box of foam or cardboard around it. Put a little U-bend in the 399's legs for strain relief.

Dick Moore

On Apr 9, 2013, at 9:00 AM, volt-nuts-request@febo.com wrote:

Message: 1
Date: Mon, 08 Apr 2013 22:05:48 -0400
From: Mike S mikes@flatsurface.com
To: volt-nuts@febo.com
Subject: [volt-nuts] Looking for VREF - SZA263/LTFLU-1/MCA19xxN
Message-ID: 5163777C.4070807@flatsurface.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

These were used in the Fluke 332B (and others). Still used in the 732.
They seem to be unobtainium. Lots of hits on questionable Chinese sites.

It's easiest if I can find one for a reasonable price. Otherwise, I
suppose I'll have to re-do the board with an LM399.

--
Mike

Hi Mike -- my old 332, since sold, had an ovenized version of the combo transistor and Zener. Myself, I would use a 399 and put a little box of foam or cardboard around it. Put a little U-bend in the 399's legs for strain relief. Dick Moore On Apr 9, 2013, at 9:00 AM, volt-nuts-request@febo.com wrote: > Message: 1 > Date: Mon, 08 Apr 2013 22:05:48 -0400 > From: Mike S <mikes@flatsurface.com> > To: volt-nuts@febo.com > Subject: [volt-nuts] Looking for VREF - SZA263/LTFLU-1/MCA19xxN > Message-ID: <5163777C.4070807@flatsurface.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > These were used in the Fluke 332B (and others). Still used in the 732. > They seem to be unobtainium. Lots of hits on questionable Chinese sites. > > It's easiest if I can find one for a reasonable price. Otherwise, I > suppose I'll have to re-do the board with an LM399. > > -- > Mike