Matched Quad RCA VT-90 JRC-6H6 VT90 6H6 Vacuum Tubes Milspec 12ED5 NOS NIB Transconductance measured 44 and 44

Transconductance measured 44 and 44 where minimum (65%) is 35

These five Ken-Rad-MANUFACTURED 6U7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box matched pair of black plate GE-MANUFACTURED

Transconductance measured 56 for Tube One and 57 for Tube Two where minimum (65%) is 40

64 and 64 where minimum (65%) is 50 and 100% is 77

Matched Quad RCA VT-90 JRC-6H6 VT90 6H6 Vacuum Tubes Milspec 12ED5 NOS NIB Transconductance measured 44 and 44These matched quad of RCA milspec JRC 6H6 6H6 VT 90 6H6 tubes was tested on our Paul Hart calibrated TV7 U. They measured (from left to right) 51 50, 51 51, 51 52 and and 52 50 Minimum (65%) is 40 40 and 100% is 62 62. They are World War Two vintage and all have US Army Signal Corp SC 278 A codes. 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