Super Silvertone 6P5 6P5G Vacuum Tube Black Plates Foil Getters Shoulder ST-Shape Zenith 10EM7 NOS NIB This hardcover book is in

This hardcover book is in excellent condition

They are lightly microphonic and not suitable for environments with excessive vibration

Transconductance measured 1950/1950 micromhos for Tube One and 2000/2000 micromhos for Tube Two

I have played it in my Bottlehead Crack headphone amplifier and it sounds terrific

Tube One measured 42 while Tube Two measured 42 as well where minimum (65%) is 31

Super Silvertone 6P5 6P5G Vacuum Tube Black Plates Foil Getters Shoulder ST-Shape Zenith 10EM7 NOS NIB This hardcover book is inThis beautiful, nostalgic looking Super Silvertone 6P5G triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 49 where minimum (65%) is 36 and 100% is 55. I played it in one of my Radio Craftsmen RC 2 monoblocks and it sounds outstanding even though it tests on the cusp. It is dead quiet when the CD player is paused and has excellent frequency response, sound staging, and