Author Topic: "GREAT" Meter! The HP 419A DC Null Voltmeter, [RESTORATION]  (Read 1583 times)

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Offline ArthurDent

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Re: "GREAT" Meter! The HP 419A DC Null Voltmeter, [RESTORATION]
« Reply #25 on: May 22, 2020, 05:35:58 pm »
My HP 419A is basically unmodified except for the new batteries I put in some time ago. I bought four of the 5 cell AA NiCd battery packs on eBay designed for phone use and they fit in nicely and work well. Here is a Youtube link of the meter comparing two 10.00000 volt LTZ1000ACH references with the null meter set for 3uV full scale. Also added a photo of the replacement batteries in place.

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