Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-Testing 12GN7 Nonal

Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-Testing 12GN7 NonalThis 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

Transconductance (TV7/U): 54/51

IN WELL OVER 2000 TRANSACTIONS

It has perforated plates

These three Sylvania 6BC5 / 6CE5 tubes tested to spec on our Paul Hart-calibrated TV7/U

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

Menin" by Mercury Living Presence

It is for the antenna alone

This RCA Victor 5W4 tested 41/42 on our Paul Hart-calibrated TV7/U where minimum (65%) is 40/40 and 100% is 62/62

new in box US-made number / type 89 tubes tested to spec on our Paul Hart-calibrated TV7/U

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

They measured 90/82 for Tube One and 91/84 for Tube Two where minimum (65%) is 57/57

new in box RCA 6AS5 tubes tested to spec on our Paul Hart-calibrated TV7/U