TWO Amperex ECC82 12AU7 tubes

Tubes test at 1900, 2000 and 1900, 1900 where pass/fail is 1430 micromhos

Foil D getters / 45 degree angle slanted D

Long plates / 17mm ribbed plates

Made in Holland

--K61 Δ5L etched date code =

Δ = Phillips, Heerlan Holland factory

5 = 1955

L = December

--K61 Δ5K etched date code =

Δ = Phillips, Heerlan Holland factory

5 = 1955

K = November

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

FULL TEST RESULTS:

Tube 1:

1900 gm / 2000 gm (uMhos)

8.4 mA / 10.4 mA Plate Current Emissions (iP)

NO SHORTS / ZERO GAS

% Test results in percent %

86.3% / 90.9% gm (uMhos)

80% / 99% mA plate current

------

Tube 2:

1900 gm / 1900 gm (uMhos)

9 mA / 8.4 mA Plate Current Emissions (iP)

% Test results in percent %

86.3% / 86.3% gm (uMhos)

85.7% / 80% mA plate current

NO SHORTS / ZERO GAS

USA Shipping free priority

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