Two GE 6386 tubes

Tubes test 4200, 3310 and 3200, 4100 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 codes=

Week 9 year 1956

Week 4 year 1956

The tube's 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:

4200 gm / 3310 gm (uMhos)

9.6 mA / 8.8 mA Plate Current Emissions (iP)

NO SHORTS / ZERO GAS

% Test results in percent %

105% / 82.75% gm (uMhos)

100% / 91.6% mA plate current

------

Tube 2:

3200 gm / 4100 gm (uMhos)

8.6 mA / 10 mA Plate Current Emissions (iP)

% Test results in percent %

80% / 102.5% gm (uMhos)

89.5% / 104.1% 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*