Tubes are identical in construction
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.Tested at: 83/100 plate current 10.7/12.6
87/100 plate current 10.5/12.1
Average new: 92/92
Minimum good: 56/56
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date codes ED,DK Construction: ring getter long gray plate
Glass: clear chrome top
Base: 9 pin
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!