Tested Matched Pair of 1959 GE JG-6BN6 Mil Spec Tubes with Original Boxes.
Date Codes 59-26.
The boxes have packaged dates of 4/59 (April, 1959).
Tubes are closely matched for mutual conductance (Gm), date codes and internal structure - they are identical.
Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:
Gm Test = 650-925 and 700-925 micromhos
Minimum pass/good = 440-570
