Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-Testing February 10 2023 new in box GE 33GY7A

new in box GE 33GY7A tubes tested to spec on our Paul Hart-calibrated TV7/U

THAT IS ALL I CAN DO

24 and 24 where minimum (65%) is 25 and 100% is 38

It sounds very good with light surface noise and the occasional click and pop

Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-Testing February 10 2023 new in box GE 33GY7AThis new old stock testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 50 50 while Tube Two measured 49 54 where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. These tubes have steel support rods; short bases; beefy black plates: side O getters; anode coolers for cooler operation and longer life. Both have BW date codes. I played them in my Alan