Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Code: -
NOS/Used: used
Construction: silver plate [] getters
Glass: clear no burn marks
Base: tight
Tested at: 52 54 54
Average new 66
Minimum good 40
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!