Pair of RCA/Raytheon 6K7GT vacuum tubes tested at new old stock 
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Tested at: 63 61 
Average new: 60
Minimum good: 36
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date code: - 
Construction: mesh plate solid foil getter 
Glass: clear no burn marks
Bases are tight
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!