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Tested 900 and 875 µmhos respectively on a Hickok 752A where minimum is 500 ..
$149.99 USD
This is a pair of NOS vacuum tubes designated "RB" and made in the USA.Tested on a Hickok Model 752A..
$89.99 USD
Tube #1 tested 300/300 Tube #2 tested 325/325 on Hickok 752A, minimum is 200. The 752A gives a ..
$39.99 USD
Tested 600/675 mhos on Hickok 752A, minimum new is 475Both have Philips date codes. Gray plate and t..
$27.99 USD
Used tubes from same audio channel, made in Germany. Results from test on Hickok 752A: 7000/725..
$44.99 USD
NOS matched pair tubes made in USA and branded Continental on the base. Both tested 1000/1000 on a H..
$49.99 USD
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