Two Mullard made for GE EL34 / 6CA7 tubes

Tubes test at 11100 & 11500 where pass/fail = 7150 micromhos

The tubes test strong, but show heavy signs of use on top silvering getter flash , used

Made in Great Britain

Date codes:

Xf2 B6J2 =

Blackburn 1966 October week 2

Xf2 B6J3 =

Blackburn 1966 October week 3

Welded plates / copper posts rods

Double O getter / OO getters

No rattle / no loose parts

Test result printout enclosed on each box

Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode)

COMPLETE TEST RESULTS:

Tube 1:

11100 gm (uMhos)

94.6 mA Plate Current Emissions (iP)

NO SHORTS / NO GAS

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Tube 2:

11500 gm (uMhos)

94.4 mA Plate Current Emissions (iP)

NO SHORTS / NO GAS

% Test results in percent %

100.9% / 104.5% gm (uMhos)

94.6% / 94.4% mA Plate Current Emissions (iP)

*In photos, I use both camera flash on and camera flash off to show all detail*

USA shiooing= USPS

International shipping= UPS or FedEx 7-10 day delivery