Matched Pair Ken-Rad 6SJ7 Vacuum Tubes JANCRC12SG7Y Milspec new in box Sylvania 6AC7

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

Transconductance measured 2000/1900 micromhos for Tube One and 2000/2000 micromhos for Tube Two

This paperback book is in very good condition

new in box (for Tube One) matched pair of RCA 6C8G dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

steel support rods and gray plates

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes JANCRC12SG7Y Milspec new in box Sylvania 6AC7This 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