Two GE 6386 tubes

Tubes test 3500, 4200 and 4600, 3500 where pass/fail is 2600 micromhos

Made in USA

D getters / square getters / angle D getter

Black plates

Triple mica / x3 mica

Etched 6386 numbers on glass

Etched dot matrix date code of 1955 and 1958

The tube sections test unbalanced, but tubes test good

White boxes included with test result

printout enclosed on each box

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

FULL TEST RESULTS:

Tube 1:

3500 gm / 4200 gm (uMhos)

9.8 mA / 11 mA Plate Current Emissions (iP)

NO SHORTS / ZERO GAS

% Test results in percent %

87.5% / 105% gm (uMhos)

102% / 114% mA plate current

------

Tube 2:

4600 gm / 3500 gm (uMhos)

11.6 mA / 9.2 mA Plate Current Emissions (iP)

% Test results in percent %

115% / 87.5% gm (uMhos)

120.8% / 95.8% mA plate current

NO SHORTS / ZERO GAS

For reference:

SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current

PASS/FAIL grade for 6386 (65% of spec) = 2600 gm and 6.2 mA plate current

USA Shipping free priority or ground advantage

International shipping = UPS 7 day delivery signature service or Global Post 10-20 day delivery depending on your country

Some countries I can not ship to. International buyers message to confirm

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