http://www.axehax.com/en-US http://www.axehax.com/product/ge-nos-nib-5963-12au7-ecc82-audiophile-preamp-tube $19.99
GE - 5963 12AU7 ECC82 Premium industrial 12AU7 type, top getter with long ribbed grey plates. This tube tested BETTER THAN NEW @ 2700/2750 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity    Gas Leakage   Mutual Conductance ....]]> http://www.axehax.com/product/westinghouse-12au7a12au7ecc82-long-black-plate-sq-gtr-tube $24.99
Westinghouse 12AU7A/12AU7/ECC82 Sawtooth, Ribbed Long Black Plate, Square Getter w/ copper support. Very Good Balance Between Triodes! This tube tested better than new with excellent balanced triodes @ 2450/2400 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity ....]]> http://www.axehax.com/product/rca-shield-12au7a-12au7-ecc82-black-plate-audio-vacuum-tube $24.99
RCA, Branded Shield - 12AU7A 12AU7 ECC82 Sawtooth, Ribbed Black Plate, "D" Getter, nice double copper support posts. Date Code: 7-58 This tube tested better than new with very good balance between triodes @ 2320/2370 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity ....]]> http://www.axehax.com/product/sylvania-12au7a-12au7-ecc82-audio-preamp-vacuum-tube $19.99
Sylvania - 12AU7A 12AU7 ECC82 Sawtooth, Ribbed Long Plate, Halo Getter, copper support posts. Excellent balance between triodes. This tube tested better than new @ 2380/2400 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity    Gas ....]]> http://www.axehax.com/product/philco-12au7a-ecc82-ribbed-plate-vacuum-tube-tested $14.99
Philco - 12AU7A ECC82 Ribbed Grey Plate, Sawtooth, Square Getter, Tapered Bottom, Made in U.S.A. This tube tested better than new @ 2890/2300 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity    Gas Leakage   ....]]> http://www.axehax.com/product/vintage-cbs-12au7-a12au7aecc82-audio-amp-amplifier-tube $14.99
CBS - 12AU7 A/12AU7A/ECC82 The 12AU7A is a miniature medium-mu twin triode. The electrical characteristics of the 12AU7A and 12AU7 are essentially equivalent. As compared to the 12AU7, the 12AU7A exhibits a lower microphonic output. This tube tested Good @ 2210/2100 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) ....]]> http://www.axehax.com/product/raytheon-12au7-a12au7aecc82-amplifier-oscillator-tube $24.99
Raytheon - 12AU7A / 12AU7 / ECC83 The 12AU7A is a miniature medium-mu twin triode intended for service in radio and television receivers, as well as audio amplifiers. The electrical characteristics of the 12AU7A and 12AU7 are essentially equivalent. As compared to the 12AU7, the 12AU7A exhibits a lower microphonic output. This tube tested better than new with perfectly balanced triodes @ 3690/3690 Tested on Calibrated Hickok 6000 Tube Tester Shorts ....]]> http://www.axehax.com/product/philco-12au7a-12au7-ecc82-audio-amplifier-amp-vacuum-tube $24.99
Philco - 12AU7A 12AU7 ECC82 Ribbed Long Plate, Sawtooth, Halo Getter, Made in U.SA. 12AU7A exhibits a lower microphonic output than the essentially equivalent 12AU7. This tube tested better than new with very good balance between triodes @ 3810/3890 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) ....]]> http://www.axehax.com/product/rca-12au7-a-12au7a-ecc82-electronic-pre-amp-tube $9.99
RCA - 12AU7A 12AU7 ECC82 Ribbed Plate, Sawtooth, Halo Getter, Made in U.SA. 12AU7A exhibits a lower microphonic output than the essentially equivalent 12AU7. This tube tested with very good balance between triodes @ 2100/1900 Tested on Calibrated Hickok 6000 Tube Tester Shorts    Filament   Quality (Good/Bad) Continuity ....]]>