Sovtek 12AX7 12AX7A ECC83 7025 Triple 3 Mica Vacuum Tube 6SD7GT T04 This book -- and its

This book -- and its dust jacket -- is in very good condition

new in box Zenith 14B8 tube tested to spec on our Paul Hart-calibrated TV7/U

Bottles: medium height

This matched pair of Ken-Rad 6C6 tubes tested 46 and 50

Bottles: tall

Sovtek 12AX7 12AX7A ECC83 7025 Triple 3 Mica Vacuum Tube 6SD7GT T04 This book -- and itsThis Sovtek 7025 (lower gain 12AX7 ECC83) dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it measured 40 44 where minimum (65%) is 32 32 and 100% 66 66. It has outstanding silkscreening; a third mica spacer for increased vibration resistance and lowered microphonics; was made in China; has excellent flashing and a foil getter. I am playing it in one of my ArtSound single