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Anyplace to attach an outside power supply so data doesn’t need to be re-entered when replacing battery? Andrew

FWIW, I can't put my hands on my '94 catalog at the moment, but the 3456A is no longer in the '95 one - it has the 3457A & 3458A. -Pat ?

And your attempt worked. Thanks. DaveD KC0WJN [email protected]> wrote:

Yes, after I posted I looked around and found several good-quality copies. I did that backwards! DaveD KC0WJN [email protected]> wrote:

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 -

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. [email protected]> wrote:

You have a failed power supply/ Almost certainly the main switch Q1 a MOSFET. This can also take out the feedback transformer T2 which is a PITA. You can ty DC input, see

Nice copies of the various HP3456A manuals are available on Ko4bb.com -Chuck Harris <kc0wjn@...> wrote:

Hi Are the Cal signal at w9 ok-about -25 ?—if so I guess you have the same fault we have seen in the MXA series-bad switch at Rf Front end.. Regards Hardy Fra:

AC fuse as in the mains side? My first check would be if there are no RIFA X/Y caps that have died & shorted. Wilko

I would check at the input of the power supply for a shorted filter cap. or a shorted rectifier diode. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

I was able to source some CS5208-1 from Kynix. Had good results ordering obsolete/obscure parts from them before: https://www.kynix.com/productdetails/5533925/onsemiconductor/cs52081gt3.html Also

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

The 3458A is indeed the gold standard, and one of the few instruments to be made with all three names on the front. They are great meters, even (especially?) by today's standards.

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). I own a

Friends, My beloved HP8920B RF Communications Test Set started blowing the 5A AC fuse today.? It blows as soon as you push the power switch.? I am wondering if there is a common problem I could

I had no idea they made a 3456B. Are you sure it isn’t a 3465B?

Does anybody know where I can find manuals for an HP3456B DMM? The HP site has a manual for the 3456A, how different is the 3456B from the 3456A? Thanks, BobH

Thank you for posting your story, some other 3455 owner will benefit someday. Dave Wise ________________________________ Sent: Wednesday, April 2, 2025 11:49 AM To:

Hi all, I checked U16 the latch connected to the driver U5 with a scooe. The output pin 15 ( connected to pin 9 of U5) was not stable and so I replaced U16. Now the 3455 is working again. At least no