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Old 14th August 2007, 08:35 AM   #1
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multi-volti's Avatar
Join Date: May 2005
Location: Michigan
Default weird test equipment

I inherited a North Atlantic 214C phase-angle voltmeter -I thought how cool, much easier than using a scope...

nope, it's the 400 Hz only version (fixed filter module). I may run out of 400 Hz measurements in my lifetime.

So, if I could find a schematic or hear from someone who has already invented this wheel, changing the filter to a variable one seems like a good idea.

Any thoughts? (Like use the case, cannibalize the rest?)
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Old 14th August 2007, 09:45 AM   #2
OzMikeH is offline OzMikeH  Australia
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Join Date: Mar 2007
Take it to a small avionics workshop and see if they want to swap it for some nice teflon insulated cable.
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Old 14th August 2007, 01:40 PM   #3
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Join Date: May 2005
Location: Michigan
Haha, that's where it came from...they didn't want it anymore

I've got my third differential voltmeter that doesn't cool to have mechanical readout to a microvolt! But I guess it would have to be working & compared to a real reference.

Thanks, though.
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Old 14th August 2007, 02:01 PM   #4
49 - for the 19th time!!!
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Location: Near "Music City" (Nashville Tennessee)
Hi Murray,

That unit could be worth a few bucks if it's in good working order.

See -

Once upon a time I was a tech in a Precision Calibration Lab (PMEL) and worked on those units. Brings back some memories!!
DIY audio can be expensive Ė but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"
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