Matched Pair Shuguang 6L6 6L6WGC Black Plate Vacuum Tubes NOS-Testing 5 NIB Lot Of Five "Britain" is printed on the

"Britain" is printed on the tube itself and there appears to be an incomplete Amperex-style code near the base

These three RCA-MANUFACTURED 6U7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

a dimpled-sheet getter and outstanding flashing

new in box DuMont 6LU8 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box US-made 9003 / JAN-CKR-9003 / VT-203 / JRC9003 tubes tested to spec on our on our Paul Hart-calibrated TV7/U

Matched Pair Shuguang 6L6 6L6WGC Black Plate Vacuum Tubes NOS-Testing 5 NIB Lot Of Five "Britain" is printed on theThis new old stock testing matched pair of Shuguang 6L6WGC output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance with 400 volts on the plates and a bias of 48 volts. There were no shorts or gas. Tubes Ones plate current draw was 28. 3 milliamps while Tube Twos was 28. 4. Transconductance measured 2640 and 2760 micromhos, respectively. (New US made 6L6s typically test with plate current from the low 20s to mid 30s with