TWO Amperex ECC82 12AU7 tube

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

Holland Halo getters / BIG Halo / O getter

Short plates / 14mm ribbed plates

Bugle boy logos

Treble Clef logos

Made in Holland

Excellent intact white lettering

Δ2F4 etched date code =

Phillips, Heerlan Holland 1962 June week 4

Δ2F4 etched date code =

Phillips, Heerlan Holland 1962 June week 4

Tubes are Gm matched to within 5% difference

Tubes are mA plate current matched to within 4% difference

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

FULL TEST RESULTS:

Tube 1:

1900 gm / 2000 gm (uMhos)

10 mA / 9.6 mA Plate Current Emissions (iP)

NO SHORTS / ZERO GAS

% Test results in percent %

95% / 100% gm (uMhos)

95.2% / 91.4% mA plate current

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Tube 2:

1900 gm / 2000 gm (uMhos)

9.6 mA / 10 mA Plate Current Emissions (iP)

% Test results in percent %

95% / 100% gm (uMhos)

91.4% / 95.2% mA plate current

NO SHORTS / ZERO GAS

USA Shipping free priority / advantage

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

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