One, RCA UX-210 and one Cunningham CX-310, #10 tubes, with the globe/balloon glass envelope. Used and tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, silver-colored plates, excellent silvering, disk getter. Tubes are matched for dynamic gain and structure- test at 1600, 1550 where pass/fail is 790 micromho. The tubes have the same structure inside and out. These are the filaments that glow very brightly.
Many other lots of tubes for sale this week.
Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.o