CBS 6X4 vacuum tube tested strong with great balance
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Tested at: 52/52
Average new: 60/60
Minimum good: 40/40
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date code: -
Construction: black pale square getter
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!