Tubes are similar in construction
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Date code: unreadable
NOS/Used: used
Construction: black plate round getters
Glass: clear
Base: -
Tested at: 77 92
Average new 76
Minimum good 46
The minimum is equal to 65% of the life of the tube
Tested for shorts and gas.
30-day free return. Your items will be packed very well and shipped promptly.
We combine shipping on tubes.
Always glad to answer any questions.
Thanks for looking!