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Dave Daniel suggested that he maybe should scan and make
a pdf out of his HP3456<<<A>>> manual.? I was trying to head
that off.

I looked in the following catalogs:

1986 - 3456A
1987 - 3456A
1988 - 3456A
1989 - 3456A
1990 - 3456A
1991 - 3456A
1992 - 3456A
1993 - 3456A
...
1997 - no 3456 model number in catalog
...
1999 - no 3456 model number in catalog
2000 -

So, if the "B" model exists, it would be in 1994, 1995, or 1996.

The 3458A was the only meter in the 34XX series in 1999.

Searching for HP3456B results in a couple of ChatGPT created
results that don't actually contain 3456"B".

Although the OP hasn't chimed in, I would bet he made a mistake.
I am pretty certain that no 3456B ever existed as a DVM.

-Chuck Harris


On Thu, 3 Apr 2025 05:20:16 -0700 "Radu Bogdan Dicher via "
<vondicher=[email protected]> wrote:
> I've never heard of a 3456B. I don't think there is one. It'd be very
> interesting to learn if that's not so.
>
> Radu.
>
> On Thu, Apr 3, 2025, 3:43 AM Chuck Harris via <cfharris=
> [email protected]> wrote:
>
> > Nice copies of the various HP3456A manuals are available
> > on Ko4bb.com
> >
> > -Chuck Harris
> >
> >
> > On Wed, 2 Apr 2025 23:37:26 -0400 "Dave Daniel via "
> > <kc0wjn=[email protected]> wrote:
> > > Yes. There was a time when a 3458A was on my list of expensive
> > > instruments to acquire for my lab, but I ended up with the 3456A
> > > as an interim solution and it has fulfilled my needs. I wish I
> > > could find a replacement for the small aluminum panel on the RH
> > > side on which the binding posts are mounted because mine is badly
> > > and deeply scratched, but tha's a nit.
> > >
> > > It sounds as if i should scan my 3456A manual and upload a copy of
> > > the PDF to the HP Wiki. I an in the process of scanning a
> > > Tektronix 7934 manual (the foldouts are tedious to properly
> > > scan), so the 3456A manual scan would be queued behind that.
> > >
> > > Everyone should own an HP 345xA, a Fluke 27 and af least one
> > > Simpson 260, lol.
> > >
> > > DaveD
> > > KC0WJN
> > >
> > >
> > > On Wed, Apr 2, 2025 at 22:54 Dave McGuire via <mcguire=
> > > [email protected]> wrote:
> > >
> > > > On 4/2/25 22:48, Dave Daniel via wrote:
> > > > > They made 3455s, 3456s, 3457s and 3458s. I think but am not
> > > > > sure that these were all "A" models, i.e., 3456A. My
> > > > > understanding is that the 3458A is the (or one of) gold
> > > > > standard(s).
> > > >
> > > >? ? The 3458A is indeed the gold standard, and one of the few
> > > > instruments to be made with all three names on the front.
> > > >
> > > > > I own a 3456A.
> > > >
> > > >? ? They are great meters, even (especially?) by today's
> > > > standards.
> > > >
> > > >? ? ? ? ? ? ? ?-Dave
> > > >
> > > > --
> > > > Dave McGuire, AK4HZ
> > > > New Kensington, PA
> > > >
> > > >
> > > >
> > > >
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