Super Silvertone 6P5 6P5G Vacuum Tube Black Plates Foil Getters Shoulder ST-Shape Zenith 10EM7 NOS NIB They are lightly microphonic and

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

These four US-made

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

new in box RCA 17JM6A tubes tested to spec on our Paul Hart-calibrated TV7/U

Super Silvertone 6P5 6P5G Vacuum Tube Black Plates Foil Getters Shoulder ST-Shape Zenith 10EM7 NOS NIB They are lightly microphonic andThis 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