RCA 6080 / 6AS7 Vacuum Tube Valve NOS-Testing For Your Bottlehead

RCA 6080 / 6AS7 Vacuum Tube Valve NOS-Testing For Your BottleheadThis 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

new in box and tested to spec on our Paul Hart-calibrated TV7/U

The spine is in fine shape with no loose pages and the dust jacket is without nicks or tears

The Marconi is Canadian and the rest are American

66 and 68 where minimum (65%) is 45

This matched pair of Hytron black glass 6V6GT output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

5 record cleaner and then played on my Rega Planar Three

They measured 12/18

Conductance: 1475 / 1690

new in box US-made 8BA11 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Sylvania 14R7 tubes tested tested to spec on our Paul Hart-calibrated TV7/U

These tubes have acid-etched codes and designations as well as silk-screened 67-05 67-22 188-5 and 68-26 188-5 67-50 production run/provenance codes

ZENITH-LABELED) measured 74/76 while Tube Two measured 76/78 where minimum (65%) is 50/50 and 100% is 77/77