TWO Telefunken ECC83 / 12AX7 tubes

Tubes test at 1800, 1900 and 1500, 1700 where 1040 micromhos is pass/fail grade

Excellent white lettering

Excellent logos

Matched hb date codes=11/56 November 1956

Top Halo getters

17mm long ribbed grey plates

Diamond logos etched on bottom base with #28 #29 numbers inside diamond logos

STRONG TEST RESULTS

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

TEST RESULTS:

Tube 1:

1800 gm / 1900 gm (uMhos)

1.5 mA / 1.5 mA Plate Current Emissions (iP)

NO SHORTS / ZERO GAS

% Test results in percent %

112.5% / 118.7% gm (uMhos)

125% / 125% mA plate current

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Tube 2:

1500 gm / 1700 gm (uMhos)

1.2 mA / 1.3 mA Plate Current Emissions (iP)

% Test results in percent %

93.75% / 106.25% gm (uMhos)

100% / 108.3% mA plate current

NO SHORTS / ZERO GAS

USA Shipping free priority or ground advantage

International shipping = UPS or FedEx 7-10 day signature delivery

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*