This item has been sold.
Leeds & Northrop Model 9912 Run-Up Box

 

Leed Northrop 9912 Runup Box.jpg (43877 bytes)

 

 

Product Description

Leeds & Northrop 9912 Run-Up Box. The run-up box is a battery operated, low resistance source of adjustable dc millivoltage for checking and calibrating instruments which require current flow for their operation, such as deflection type millivolt indicators or dynamic checking of low range micro-max recorders or galvanometer type null balance instruments.

Specifications

Its output is adjustable from 0 - 120 mV, adjustable to better than 0.02 mV. It comes complete with the original box and two gold-plated straps, as shown in picture.

Condition

It is mint. In 1968, the price of this box was $70.

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Last modified: June 02, 2005