Two, Western Electric VT-25A tubes, with the shouldered glass envelope, military issue. The VT-25 tube is in the same family as the UX210/UX-210, CX310/CX-310, 10, 10Y, and 210 tubes. Used and tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, brown, white ceramic bases, long black plates. Tubes are matched for dynamic gain and structure- test at 2200, 2150 where pass/fail is 790 micromho, when tested as a #10 tube. They test at new levels for dynamic gain. The tubes have the same structure inside and out.
Many other lots of tubes for sale this week.
Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.o