RCA 6080 / 6AS7 Vacuum Tube Valve NOS-Testing For Your Bottlehead The Tubes SP-4534 67 and 74 where minimum

67 and 74 where minimum (65%) is 53

new in box Hytron 6AD7G tube tested to spec on our Paul Hart-calibrated TV7/U

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

Transconductance was 1890 for Tube One and 2000 for Tube Two where new/nominal is within one standard deviation of 1900

This lot of four Tung-Sol 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

RCA 6080 / 6AS7 Vacuum Tube Valve NOS-Testing For Your Bottlehead The Tubes SP-4534 67 and 74 where minimumThis RCA 6080 6AS7 dual triode output tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 68 64 where minimum (65%) is 36 36. I have played it in my Bottlehead Crack headphone amp and it sounds great, with a very low noise floor and excellent soundstaging, dynamics and frequency response. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING