Rms converter to match HP3400A?

What is your suggestion to match the specs of the HP3400A AC millivoltmeter’s rms converter with analog parts available today? I’m drawing a line to exclude AD conversion and digital rms calculation. So it stays analog.

Below is the spec sheet:

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ggabe over 1 year ago in reply to phoenixcomm +4

My motivation is “restoration”. This is the only analog instrument I have. I like the retro vibe of the mirrored gauge. Three different rms converters in my parts box already, time to make them work all…
scottiebabe over 1 year ago in reply to scottiebabe +4

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scottiebabe over 1 year ago in reply to phoenixcomm +4

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phoenixcomm over 1 year ago

ggabe Your HP3400A is an old-school analog meter. I personally have a FLUKE 113 which does "true RMS" I got mine in a pawn shop for about 50 bucks. but if you like new Lowes (Box Store) is about 150 bucks. Now it's time to ponder Fix or Replace. If fix Did you check out the parts available from HP ops? Agilent or now Keysite??
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phoenixcomm over 1 year ago in reply to phoenixcomm

ggabe BTW what died.. I'm not an analog type. But I just had a peek at the schematics and it doesn't look too hard to repair. Do you know what part(s) died??
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ggabe over 1 year ago in reply to phoenixcomm

The thermal converters blown out. I see many repairs/replacements.
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phoenixcomm over 1 year ago in reply to ggabe

do you mean TC401 & TC402 on page 47?? if so part numbers for both are D853-0003 if so I Keysite looking into it.
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phoenixcomm over 1 year ago in reply to ggabe

do you mean TC401 & TC402 on page 47?? if so part numbers for both are D853-0003 if so I Keysite looking into it.
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