Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes Valves NOS NIB May 16 2025 280 739 and F1 date

280 739 and F1 date codes

EIA Factory Codes: RCA livery

new in box US-made number / type 89 tubes tested to spec on our Paul Hart-calibrated TV7/U

2 for Tube Two

They sound terrific and have great bass with sparkling highs and Donald Fagan’s voice is warm and clear as a bell

Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes Valves NOS NIB May 16 2025 280 739 and F1 dateThis new old stock, new in box matched pair of GE 6BL7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 44 45 for Tube One and 45 45 for Tube Two where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. They have O getters; copper support rods; great flashing and 63 48 188 5 and 64 13 188 5 factory date codes, respectively. I played them in my Alan