Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB TC-1018-A wire snubbers for increased rigidity

wire snubbers for increased rigidity and lowered microphonics

crenelated mica spacers

Tube Two measured 10

Three are GE and two are Sylvania

new in box RCA 12D4 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB TC-1018-A wire snubbers for increased rigidityThis 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