Hitachi 12AU7 ECC82 Vacuum Tube NOS NIB For Your Bottlehead Or Univalve Triple Tested 1st Quarter BW02 perfectly-matched pair of Ken-Rad 6SJ7s

perfectly-matched pair of Ken-Rad 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

54 and 54 where minimum (65%) is 40 and 100% is 62

These tubes dissipate an additional three watts -- or so -- more than EL34s with standard skinny bottles

but is fine at all listening levels

new in box RCA 8AR11 tube tested to spec on our Hickok 800 tube tester

Hitachi 12AU7 ECC82 Vacuum Tube NOS NIB For Your Bottlehead Or Univalve Triple Tested 1st Quarter BW02 perfectly-matched pair of Ken-Rad 6SJ7sThis 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