Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS NIB 6AU5 T40 Transconductance was 1900 for Tube

Transconductance was 1900 for Tube One and 1800 for Tube Two where new/nominal is within one standard deviation of 1900

new in box RCA 6LN8 / LCf80 tubes tested to spec on our Paul Hart-calibrated TV7/U

These tubes have gray plates and nice flashing

This lot of seven RCA industrial-grade 1852 (6AC7) tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS NIB 6AU5 T40 Transconductance was 1900 for TubeThis new old stock, new in box matched pair of GE 6SJ7s was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 58 for Tube One and 59 for Tube Two where minimum (65%) is 40. They have 0 09 188 5 and 9 04 188 5 date provenance codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. WE HAVE SCORES OF THOUSANDS OF VACUUM