Matched Pair Toshiba 8FQ7 8CG7 6FQ7 6CG7 Vacuum Tubes Copper Support Rods Bach OM 555 032

Matched Pair Toshiba 8FQ7 8CG7 6FQ7 6CG7 Vacuum Tubes Copper Support Rods Bach OM 555 032This matched pair of 8FQ7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 45 in Section One and 50 in Section Two for Tube One and 50 44 in Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have gray plates; copper support rods and excellent flashing. As I write, I am playing them in my Sound Craftsmen RC 2 monoblocks with at 6. 3 rather

Sylvania-LABELED 11BM8 tested to spec on our Paul Hart-calibrated TV7/U

GE-BRANDED 40KG6A / PL509 tube tested to spec on our Paul Hart-calibrated TV7/U

This GE 18GB5 tube tested to spec on our Paul Hart-calibrated TV7/U

Tube Two measured 1750/23

This tube looks great

but tests on the low side for a new tube

48 and 51 where minimum (65%) is 32 and 100% is 49

Transconductance measured 7240 micromhos for Tube One and 7270 for Tube Two

perfectly-matched pair of RCA 5879 tubes was tested on our Paul Hart-calibrated TV7

new in box milspec Ken-Rad JAN-CKR6H6 / VT-90 / 6H6 tubes tested to spec on our Paul Hart-calibrated TV7/U

32 and 33 where minimum (65%) is 25

An eight out of ten with an ice bottom end