Free HP3456A qty 3 on the freebie shelf later today


#1

I’ll be dropping off three of these on the freebie shelf after work. One is a bit flaky on some ranges, another does not get past self-test, and one does not power up. An ambitious individual should be able to cobble together one out of these three.

https://xdevs.com/fix/hp3456a/


#2

I will be very interested in trying to cobble a working unit or two out of them if I can get my hands on them. They would be great on my home electronics workbench.


#3

I see from the link that these units are based on a Motorola 6800 microprocessor.

If anyone needs help with their firmware, I have plenty of experience with the 6800.


#4

These look like the units that Dave Guill overhauled. 6800 old school ram, rom, etc.


#5

Yep, his were the older ones. My current fleet consists of a Fluke 8840A, HP 3437A, Fluke 112, and a Keithley 617 electrometer. I think I’m covered on the voltage measurement front. :slight_smile: