Sylvania 7F7 Vacuum Tube Sylvania 3E6 NOS NIB meaning you need to indicate

meaning you need to indicate the quantity you want

dimpled-sheet getters and terrific flashing

These four Sylvania 7Q7s tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-TESTING matched pair of Sylvania 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

It sounded great in my Bottlehead

Sylvania 7F7 Vacuum Tube Sylvania 3E6 NOS NIB meaning you need to indicateThis Sylvania 7F7 was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 42 44 where minimum (65%) is 33 33 and 100% is 51 51. I have played it in my Cern Audio phono pre preamplifier as a 6SL7 substitute (with an adapter, not included) and it sounds outstanding. It is dead quiet when the preamp is muted and has excellent frequency response, sound staging, and dynamics It is somewhat