Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Top Filament NOS NIB 6N1P 3230 3230 Tubes Two through Seven tested

Tubes Two through Seven tested 40/38

As a survivor of Communist East Germany

Tube One's etching is "5654" while Tube Two's is "6AK5

These three Raytheon 6C5s were tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 42 while Tube Two measured 42 as well where minimum (65%) is 31

Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Top Filament NOS NIB 6N1P 3230 3230 Tubes Two through Seven testedThis new old stock, new in box matched pair of GE 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 an outstanding 92 93 for Tube One and 94 93 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have additional filaments across the top tube for an enhanced light show; side O getters; copper support rods; a round and square hole