Tubes are identical in construction one of the boxes is beat
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.Tested at: 113/106 plate current 26.1/24.8
113/99 plate current 25.2/20.2
Average new: 103/103
Minimum good: 62/62
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date code: GA7 42D4, GA7 42H? very hard to read!
NOS/Used: new
Construction: gray plate round getters
Glass: clear
Base: -
30-day free return.
We combine shipping $1.00 for each extra tube purchase.Your items will be packed very well and shipped promptly.
Always glad to answer any questions.
Thanks for looking!