3 RCA 6B8 VT-93 Milspec Vacuum Tubes Valves Lot Of Three New Songs LP 1986 It took two adapters but

It took two adapters but was worth it as they sounded fine in my Mini 2013

Transconductance measured 56 for Tube One and 57 for Tube Two where minimum (65%) is 40

This Cunningham narrow bottle 25Z5 tube was tested on our Paul Hart-calibrated TV7/U for emissions

These nine Sylvania 6AU6 / 6AU6A were tested on our Paul Hart-calibrated TV7/U for shorts

The spine is in fine shape with no loose pages and APPEARS to be leather-bound

3 RCA 6B8 VT-93 Milspec Vacuum Tubes Valves Lot Of Three New Songs LP 1986 It took two adapters butThis lot of three RCA Milspec 6B8 VT 93 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas, emissions and transconductance. There were no shorts or gas and they tested as follows: Tube one measured 45 in its triode section where minimum (65%) is 29 and 100% is 45. Its diodes measured 33 and 66, respectively, where minimum (65%) is 40 40 and 100% is 61 61. Tube Two (triode): 50 Tube Two (diodes): 71 53 Tube Three (triode): 51 Tube Three