Two, RCA Radiotron #45 tubes, with the globe/balloon glass envelope. These are of course exact equivalents to the UX-245/UX245, CX345/CX-345, 145, and 245 tubes. Used and tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure- test at 1600, 1550 where pass/fail is 1170 micromho. The tubes have the same structure inside and out, however the base logo and reference for tube type are different, as one is designated a RCA Radiotron UX-245 and the other simply RCA Radiotron 45- with all else the same.  The plate structure, the ladder type, is like those which are usually designated RCA Radiotron 45- the one tube obviously produced in that transitionary period

Many other lots of tubes for sale this week.

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