Groove Tube 12AX7 / ECC83 / GT-ECC83-S Premium Vacuum Tube For Your Univalve December 18 2020 These seven US-made 5V6GT tubes

These seven US-made 5V6GT tubes tested as follows on our TV7/U: 40

shields between triodes to eliminate crosstalk

34 and 35 where minimum (65%) is 25

They tested 53 and 78 where minimum (65%) is 40 and 100% is 62

Groove Tube 12AX7 / ECC83 / GT-ECC83-S Premium Vacuum Tube For Your Univalve December 18 2020 These seven US-made 5V6GT tubesThis Groove Tube GT ECC83 S ECC83 12AX7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it measured 40 37 where minimum (65%) is 32 32 and 100% is 49 49. It has outstanding silkscreening; excellent flashing and an O getter. I am playing it in one of my ArtSound monoblocks as I write and it is absolutely silent. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT