Matched Pair General Electric GE Red Label 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods RCA Camden These are ultra-low-noise

These are ultra-low-noise

Three are GE and two are Sylvania

C Grafica s

where minimum (65%) is 40/40 and 100% is 61/61

Matched Pair General Electric GE Red Label 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods RCA Camden These are ultra-low-noiseThis matched pair of GE Red Label 6SN7GTB dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 70 66 for Tube One and 71 70 for Tube Two. (Minimum (65%) is 50 50.) They have O getters; tall bases; copper support rods; a round and square hole in each mica spacer; great flashing and 64 09 188 5 and 63 13 188 5 date factory codes, respectively. I have played