Valvo 12AT7 ECC81 Vacuum Tube For Your Univalve Zenith 7476 7678 black 17MM plates

black 17MM plates

Tube One measured 42 while Tube Two measured 42 as well where minimum (65%) is 31

This perfectly-matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart-calibrated TV7/U for shorts

These tubes all have small logos as well as 048

Sold as-is until I find a setting

Valvo 12AT7 ECC81 Vacuum Tube For Your Univalve Zenith 7476 7678 black 17MM platesThis Valvo 12AT7 ECC81 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured an underwhelming but well balanced 40 42 where minimum (65%) is 50 50 and 100% is 77 77. This tube has nice silkscreening; a flared base; sutured tops and excellent flashing. It sounded great in my Bottlehead, though is not recommended for this headphone amp which was designed for