Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing

Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-TestingThis new old stock testing matched pair of Sylvania 6AU6 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 82 for Tube One and 84 for Tube Two where minimum (65%) is 58. These tubes have top, U getters; gray plates and excellent flashing. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee

US-made 7C7 tubes in this lot

microphonics and transconductance

All three sections of this Telefunken EBF89 / 6DC8 tube were tested on our Paul Hart-calibrated TV7 for shorts

new in box US-made 6W6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

I am playing them as I write in my Alan Eaton single-ended 45 amplifier with RCA Living Stereo's CD of Bartok's "Concerto For Orchestra

This Radio Shack / Realistic 6JE6C tube tested 80 on our Paul Hart-calibrated TV7/U where minimum is 54 and new is 100

spring-loaded

(New US-made 6AU6s typically test from 2300 micromhos or so

This hardcover book is in fair condition

new in box GE 21LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This double CD played fine in my Denon DCD-1650AR

This matched pair of RCA 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts