Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS NIB 6AU5 T40 These tubes have gray plates

These tubes have gray plates and nice flashing

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

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

Their Apex numbers are 26 milliamps

These five Ken-Rad number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS NIB 6AU5 T40 These tubes have gray platesThis 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