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 Post subject: ID and info... need some help. Thanks!
PostPosted: Sep Sat 25, 2021 11:52 pm 
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Joined: Sep Sat 25, 2021 11:31 pm
Posts: 2
Picked this up at a yard sale today for a few bucks. I have no engineering skills but can never ignore vintage gear. I'm a guitar player so this item is out of my wheelhouse. Beautifully made though; great knobs, switches, face plate, and wooden box. The only labeling says Millivolt Potentiometer, California Research Corporation, La Habra CA. Inside there are some components labeled Leeds Northrup.

I have no expectation that it is worth $$ to anyone, but I'd like to know more about it. Anyone? Thanks!


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 Post subject: Re: ID and info... need some help. Thanks!
PostPosted: Sep Sun 26, 2021 2:45 am 
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Joined: Sep Mon 16, 2013 2:42 am
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Location: Tucson, Arizona U.S.A.
It's a device for accurately measuring small DC voltages (millivolts). The idea was to compare the unknown voltage against a "standard" voltage and adjust it until the voltages matched. Then the voltage could be read from the knob positions. Equality was indicated on the galvanometer at the top canter. Whether the standard cell was internal or connected externally hasn't been determined at this point.

_________________
Jim Mueller

Who's that swimming in the punch bowl?
It's Walter Wart, the freaky frog!


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 Post subject: Re: ID and info... need some help. Thanks!
PostPosted: Sep Sun 26, 2021 4:58 am 
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Joined: Sep Sat 25, 2021 11:31 pm
Posts: 2
Thanks for the good info. And extra credit for the Walter Wart reference. I used to listen to Dr. Demento religiously in the early 70s.


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