Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes NOS-Testing 5 Tung-Sol These seven Philco number /

These seven Philco number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

I have played them in my Radio Craftsmen RC-2 monoblocks and they sound great

I am glad I've lived to see it

These four Sylvania-MANUFACTURED 6U7G tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes NOS-Testing 5 Tung-Sol These seven Philco number /This 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 72 for Tube One and 74 for Tube Two where minimum (65%) is 58. I am playing them in my Musical Paradise MP 3 single ended integrated amplifier (with adapters, not included) with Aimee Mann's seminal "Magnolia" album and they sound terrific. These tubes