Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-Testing 12GN7 Nonal top O getters and rectangular

top O getters and rectangular mica spacers crenelated on the short axes

Transconductance (TV7/U): 54/51

(New 12AU7s typically test within one standard deviation of 2200 micromhos

IN WELL OVER 2000 TRANSACTIONS

It has perforated plates

Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-Testing 12GN7 Nonal top O getters and rectangularThis new old stock testing matched quad of Sylvania MANUFACTURED, CONN BRANDED and SELECTED 12AU7A ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 81 82 for Tube One and 81 85 for Tube Two. Tubes Three and Four measured 84 80 and 81 85, respectively where minimum (65%) is 56 56 and 100% is 86 86. These tubes were selected by CONN Organ for