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Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 0
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 1
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 2
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 3
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 4
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 5
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 6
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 7
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 8
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 0
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 1
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 2
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 3
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 4
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 5
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 6
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 7
Vintage Millivolt power supply 0 - 400 mV works great!, US $50.00 – Picture 8

Vintage Millivolt Power Supply 0 - 400 Mv Works Great!

US $50.00

  • Schaumburg, Illinois, United States
  • Jan 29th
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Up for sale is a Vintage Leeds & Northrup DC millivolt power supply The power supply uses just one "D" size battery which will be included The power supply has a voltage range of  -400mV to +100mV Or the other way around depending on how you hook up the battery. The current meter has a range of  +15uA to -15uA The current meter was off and registered 10uA when the current was 4uA so I added a 1k trimpot across the meter to be able to calibrate it. It can be mounted under the cover to clean up the top. The controls on the unit are: A large knob to set the desired millivolts A large knob to calibrate the output to the dial A knob on the meter to zero the pointer A knob that slides to lock the pointer for moving the unit A pushbutton labeled 'E.M.F.' to provide a millivolt output to the terminals marked 'Q' and 'C' A pushbutton labeled 'S.C.' which provides an output of about 1 volt to the unmarked terminals that varies from about 0.86v to 1.45 with the calibration setting. A trim pot was added to calibrate the meter because without it it will read 10uA when it is actually drawing 4uA. It works well to accurately set the meter and could be put inside the case to hide it. I will include the trim pot and a "D" size battery and battery holder to power the unit and a 10k resistor to check the accuracy of the meter. I will also include a schematic of the unit that I drew up    
Condition Used :
An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.
Seller Notes “This item works It is in great condition for its age just some minor scratches. I added a trim pot to make the uA meter accurate”

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