Matched Pair Ken-Rad 6SJ7 Vacuum Tubes JANCRC12SG7Y Milspec Transconductance measured 58 for Tube

Transconductance measured 58 for Tube One and 58 for Tube Two where minimum (65%) is 40

steel support rods and gray plates

This paperback book is in very good condition

This milspec CBS-Hytron USN-CHY-5Y3WGTA / 5Y3 black plate rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Sylvania 6AC7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes JANCRC12SG7Y Milspec Transconductance measured 58 for TubeThis new old stock testing matched pair of Ken Rad 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 55 for Tube One and 60 for Tube Two where minimum (65%) is 40. They have 7 09 188 5 and 630 188 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