Ecc83 12AX7 Mullard Blackburn 5pcs different brands NEW

Description

New tubes,Blackburn codes,different labels,all I63 construction.Measured and tested.
TUNGSRAM code B4B4:
1) 1,81 mA - 2,3 mA/V
2) 1,70 mA - 2,3 mA/V
ZAERIX code B0J2:
1) 1,77 mA - 2,3 mA/V
2) 1,75 mA - 2,3mA/V
VALVO code B7L3:
1) 1,96 mA - 2,6 mA/V
2) 1,80 mA - 2,4 mA/V
PHILIPS 1 code B4E1:
1) 1,61 mA - 2,3 mA/V
2) 1,71 mA - 2,4 mA/V
PHILIPS 2 code B4A1
1) 1,92 mA - 2,5 mA/V
2) 1,99 mA - 2,5 mA/V
NOTHING BETTER FOR MARSHALL AMPS AND THESE VALUES CANNOT BE BEATEN !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
(average value 1,2 mA - 1,6 mA/V = 100%)
Carefully tested,no gas,no leaks,no noise,all made in UK,Blackburn factory !!!!! TOP tubes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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