2014年1月25日 · AFAIK and if I remember correctly that was a Transfer Standard Grade Multimeter, the top of the line machine for HP before the 3458A. 3456A stability should be …

2015年10月29日 · Sick HP 3456A bought for 50$ from fleabay was cured by some clever non-standard misfit of ROM and RAM chips, as well as usual fixes here and there, common with …

2013年2月26日 · If you don't need amp mode, the DC accuracy can be much higher on the 3456a that the manual states. The 3478a is not of the same class as these DMM in accuracy. …

2018年7月1日 · Adventures in Retrocomputing: hacking a 7.5 digit HP 3456A « on: July 01, 2018, 10:47:45 pm » There was a discussion a couple months ago in the Metrology section about …

2014年10月8日 · I just bought an HP 3456A multimeter that was classified as non-operational. The symptom of its non-operation is that the unit itself turns on, begins to sample as indicated …

2024年10月8日 · Re: HP 3456A voltage offset « Reply #23 on: October 14, 2024, 10:42:13 pm » The 2N4117 (and 4118) are rather small JFETs and the maximum gate current is small and …

2019年5月3日 · Hi friends of old bench DMMs, recently I got a older HP 3456A. I read several topics here and got some useful intel out of them. Also the reason why I was looking for a …

2014年1月12日 · Re: HP 3456A DVM CPU Board Rev-B ROM replacement « Reply #1 on: January 12, 2014, 12:12:33 am » Second post with the PCB layouts and LA logs I also have …

2016年6月21日 · Author Topic: HP 3456a Self-Test Failure ("-4.00000") (Read 4112 times) 0 Members and 1 Guest are viewing ...

2019年7月19日 · I scored a broken HP 3456A for cheap and saved it from being eWaste. It starts up and displays all dashes (-----) and the selftest fails at test #3. It's a 2201 series, in …