Two, new in box, RCA 5693 tubes, with the red, painted, metal envelope. These 5693 tubes are the long life/high reliability equivalents of the 6SJ7 and 6SJ7GT tubes. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases and excellent, original paint. Tubes are matched for dynamic gain and structure- test at 2000, 2000 where pass/fail is 1040 micromho. The tubes have the same structure inside and out, having matching date codes of "62-52", the 52nd week of 1962.

Many other lots of tubes for sale this week.

Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.