Matched Pair Raytheon 6AK5 6J1 6J2 Black Plate Vacuum October 31 2024 This nearly-perfectly-matched pair of GE

This nearly-perfectly-matched pair of GE 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

They measured (from left to right) 27/26

top mica spacer

This amp was designed to use 6SN7s and I do not recommend using 12SN7s

(New US 6L6GCs typically test with plate current from the low 20s to mid 30s with transconductance from 2200 micromhos or so

Matched Pair Raytheon 6AK5 6J1 6J2 Black Plate Vacuum October 31 2024 This nearly-perfectly-matched pair of GEThis matched pair of Raytheon 6AK5 black plate tubes was tested on our Paul Hart calibrated TV7 U. They measured 29 and 31 where minimum (65%) is 22 and 100% is 40. I am playing them in my Mini Mite 2013 as I write and they sound excellent. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY