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Both sections have identical test results using Hickok 752A. They have the same QO code.I believe th..

$29.99 USD

NOS tubes tested on Hickok 752A. Matched & closely balancedTube #1 tested 800/900 and #2 900/900..

$19.99 USD

The pentode sections are perfectly matched. All have the same QO code.Hickok 752A tested 600/1050, 6..

$44.99 USD

Tested new and balanced at 1071/1071 mhos on Hickok 752A, minimum 650Made by Philips in Holland. Shi..

$24.99 USD

Matched quad of NOS tubes branded Philips with Mullard, Blackburn "B" codeHickok 752A results are: 9..

$79.99 USD

Identically matched pair of NOS tubes branded Philips with Mullard, Blackburn "B" codePentodes 775, ..

$104.99 USD

Matched quad of NOS tubes branded Philips with Mullard, Blackburn "B" codeHickok 752A results are: 8..

$189.99 USD

Matched quad of NOS tubes branded Philips with Mullard, Blackburn "B" code3 - 27GB5A & 1 - 27GB5..

$119.00 USD

NOS exactly matched pair Made in 1962 at the Mullard factory in Blackburn EnglandHickok 752A tested ..

$69.99 USD

Closely matched pair of NOS tubes branded Philips with Mullard, Blackburn code (B1L1).Tested 1025/11..

$24.99 USD

5 closely matched NOS tubes branded Philips with Mullard, Blackburn "B" codeHickok 752A results are:..

$19.99 USD

Tubes tested New: 1000, 1025, 1025 & 1100 µmhos on Hickok 752A. Minimum is 700Same date codes, J..

$17.99 USD

Tested 600/675 mhos on Hickok 752A, minimum new is 475Both have Philips date codes. Gray plate and t..

$27.99 USD

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