Hitachi 12AU7 ECC82 Vacuum Tube Valve NOS NIB For Your Bottlehead Or Univalve Triple Tested 76 Seventysix The Superior-tested tube measured "low

The Superior-tested tube measured "low to medium-good

new in box RCA 17AY3 / 17AY3A / 17BS3 / 17BS3A tubes tested to spec on our Paul Hart-calibrated TV7/U

This industrial-grade GE 6679 / 12AT7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 49 for Tube One and 52 for Tube Two where minimum (65%) is 36 and 100% is 55

Hitachi 12AU7 ECC82 Vacuum Tube Valve NOS NIB For Your Bottlehead Or Univalve Triple Tested 76 Seventysix The Superior-tested tube measured "lowThis new old stock, new in box Hitachi 12AU7 ECC82 dual triode was tested on both our Paul Hart calibrated TV7 U as well as our Maxi Matcher Preamp Tube Tester. On the Maxi Matcher, it tested as follows: Dynamic Range: 77. 6 dB 82. 3 dB ( 92 dB is the Maxi Matcher's noise floor) Transconductance: 1410 1411 (New is approximately 1450) Gain (Mu (): 14. 6 15. 7 (New is approximately 17) On the TV7 U, it tested as follows: 79 77 where minimum (65%) is 50