6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six

6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of SixThis lot of six RCA gray glass 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas and they measured as follows (from left to right, top to bottom): Tube One: 17. 1 milliamps' plate current 1220 micromhos; Tube Two: 19. 6 1810; Tube Three: 20. 9 1440; Tube Four: 23. 6 1720; Tube Five: 25. 2 1410 and Tube Six: 31. 6 1890. New

crenelated mica spacers

1 milliamps while it measured 2380 micromhos where new US-made 6L6s typically test with plate current from the low 20s to mid 30s and with transconductance from 2200 micromhos or so

Special Features: ANODE RADIATORS (for cooler operation and longer tube life)

This tube has very nice flashing

I sold my quarter track deck years ago and cannot give you a report on how this tape sounds

This tube has anode radiators for cooler operation and longer tube life

but that was the fashion back in the 1940s

I have played this tube in my Bottlehead Crack headphone amplifier and it sounds excellent

Both have REI date codes

Tube One measured 73/75 while Tube Two measured 75/76 where minimum (65%) is 56/56 and 100% is 87/87

The Superior-tested tube measured "low to medium-good

new in box GE 12DS7 tubes tested to spec on our Paul Hart-calibrated TV7/U