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Tested 800 and 900 µmhos respectively on a Hickok 752A where minimum is 500
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Tested 2040/2440 on Hickok 752A, where the minimum is 1600/1600Clear Top Tall Bottle, Black Plate, B..
$19.99 USD
Tested 3100/3100 on Hickok 752A, where the minimum is 1600/1600Dual Triode with balanced test result..
$24.99 USD
Tags: Sylvania 7591A Vacuum Tube Pair