Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves NOS-Testing

Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves NOS-TestingThis new old stock testing matched pair of Sylvania 6AU6A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 74 for Tube One and 76 for Tube Two where minimum (65%) is 58. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee Mann's seminal "Magnolia" album and they sound terrific. These tubes

38 and 44 where minimum is (65%) is 36

I ran it in my Dynaco Stereo 70 and it sounded great

It measured 35/34 where minimum (65%) is 40/40 and 100% is 62/62

This nicely-matched pair of General Electric 12AU7/ECC82 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

short base

IN OVER 8000 TRANSACTIONS

This Delco type 80 rectifier tube was tested on our Paul Hart-calibrated TV7/U

This lot of six GE 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

new in box US-made 6JD6 tubes in this lot

slightly-shiny ladder plates

excellent flashing and 312 513 and JA MAK provenance/date codes

It measured 60/57 where minimum (65%) is 40/40 and 100% is 62/62