LFS :– [UK] – Hewlett Packard 3400A RMS Voltmeter A6 Board 03400–66512 Rev. D?

[Chris56000]

Hi!

Has anybody got copies of, or can point me in the direction of, Hewlett Packard Service Notes pertaining to the 3400A RMS Voltmeter please?

In particular, I am looking for a schematic, parts layout drawing and B.O.M./parts list for the last revision for the A6 Chopper Amplifier PCB, part No. 03400–66512, Rev. D!

Chris Williams

[Gyro]

The last chopper board is covered in version 03400-90013 of the HP3400A Service manual (~1984), available to download from the Agilent website... https://www.keysight.com/us/en/assets/9018-05695/user-manuals/9018-05695.pdf

The schematic scan isn't too clear but there's a darker scan of the manual floating around the web too, maybe manuals.lib, but I can't remember for sure (other than that there is one).


P.S. You probably want to watch Defpom's video on creating a retrofit chopper board for earlier models, as I think it has more or less the same parts and schematic...



...He's a member here too.

[Alex Nikitin]

The BAMA site has it.

Cheers

Alex

[Gyro]

Yep, that's the darker one. 

It's best to keep a copy of both so that you can see better detail on things like the attenuator assembly.

[factory]

The BAMA site has it.

Cheers

Alex

Those contain Rev C and Rev A in the back-dating changes, no Rev D, possibly only available as a service note circa 1987? which might be lost to time.

David