Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes Valves NOS NIB Princeton University This perfectly-matched pair of new

This perfectly-matched pair of new old stock

5 out of ten

hanging filaments

but their bottles are

These tubes have tall bases

Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes Valves NOS NIB Princeton University This perfectly-matched pair of newThis 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 56 56 for Tube One and 58 58 for Tube Two where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. They have chamfered top O getters; steel support rods; great flashing; stout gray plates; anode radiators for cooler operation and longer life and