Matched Pair Toshiba 8FQ7 8CG7 6FQ7 6CG7 Vacuum Tubes Copper Support Rods August 27 2025 These six 12BY7 / 12BY7A

These six 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

These three UK-made 10DX8 LCL84 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 6GF7 / 6GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

I do not recommend them for applications with vibration

34/34 and 38/41 where minimum (65%) is 25/25 and 100% is 38/38

Matched Pair Toshiba 8FQ7 8CG7 6FQ7 6CG7 Vacuum Tubes Copper Support Rods August 27 2025 These six 12BY7 / 12BY7AThis 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 67 in Section One and 70 in Section Two for Tube One and 71 72 in Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have gray plates; O getters; copper support rods and excellent flashing. As I write, I am playing them in my Sound Craftsmen RC 2 monoblocks at 6. 3