[Test-Equipment] Question about VTVM calibration

[Blair Batty]

The voltage only has to be higher than the calibrated output. If all you
want is 7.500vdc and lower, a common 9v transistor battery will do.
/b

On Wed, Feb 5, 2020 at 12:04 PM Barry <n4buq at knology.net> wrote:

> That's what I was finding as well.  The battery costs more than the
> calibrator.
>
> Thanks,
> Barry - N4BUQ
>
> ----- Original Message -----
> > From: "Blair Batty" <blairbatty at gmail.com>
> > To: "Discussion of Electronic Test Equipment" <
> test-equipment at mailman.qth.net>
> > Sent: Wednesday, February 5, 2020 10:59:10 AM
> > Subject: Re: [Test-Equipment] Question about VTVM calibration
> >
> > The battery is very expensive, so I just power it from my Rigol power
> > supply.
> > /b
> >
> > On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:
> >
> > > Hi Brian,
> > >
> > > What kind of battery do you use (or do you power it from a DC supply?)
> > >
> > > Thanks,
> > > Barry - N4BUQ
> > >
> > > ----- Original Message -----
> > > > From: "Blair Batty" <blairbatty at gmail.com>
> > > > To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
> > > Test Equipment" <test-equipment at mailman.qth.net>
> > > > Sent: Wednesday, February 5, 2020 7:21:42 AM
> > > > Subject: Re: [Test-Equipment] Question about VTVM calibration
> > > >
> > > >
> > >
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> > > >
> > > >
> > > > On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> > > > test-equipment at mailman.qth.net> wrote:
> > > >
> > > > >
> > > > > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
> > > have no
> > > > > idea how accurate they are. I’d like to obtain some reasonable
> voltage
> > > > > references with which I can calibrate them or, alternatively, a
> service
> > > > > which can do them for me. I’m in Fayetteville Arkansas. What say
> ye?
> > > > >
> > > > > Brian WA5UEK
> > > > > Sent from my iPhone
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