Matched Pair Toshiba 6FQ7 6CG7 Vacuum Tubes Copper Support Rods May We Get To Read new in box Zenith 25Z5

new in box Zenith 25Z5 tubes tested to spec on our Paul Hart-calibrated TV7/U

steel support rods

Date Codes: 1-43 and NK

new in box matched trio of GE-MANUFACTURED 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Gain (Mu (µ): 14

Matched Pair Toshiba 6FQ7 6CG7 Vacuum Tubes Copper Support Rods May We Get To Read new in box Zenith 25Z5This matched pair of 6FQ7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 64 in Section One and 64 in Section Two for Tube One and 68 68 in Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have short, gray plates; O getters; copper support rods and excellent flashing. As I write, I am playing them in my Sound Craftsmen RC 2 monoblocks