Western Electric KS15750-L1 tube tester made by Hickok

Tube tester as an output to read exact for umhoms comparations

KS15710 -L1 made by Hickok and similar to 539C	Very nice meter	Recently calibrated and with a new line voltage meter installed	Tube tester as a voltmeter output for correct readings of uhoms
top condition and recendly calibrated a great tool.	Inside of tube tester, wow work of art here!	No wonder this thing sells for $900.00, lots of flexibilty for specific calibration.

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