4 Ken-Rad 6D6 Vacuum Tubes Black Glass Lot of Four NOS-Testing 12B4A Gebraucht SOME COUNTRIES DO NOT HAVE

SOME COUNTRIES DO NOT HAVE INTERNAL TRACKING

This matched pair of RCA 6AQ5 output tubes was tested on our Paul Hart-calibrated TV7/U for shorts

great flashing and side

This pressing has lightly-moderate surface noise audible in quiet passages and barely-audible in moderate passages and louder

each having four stamped crosses: two upside-down and two right-side up

4 Ken-Rad 6D6 Vacuum Tubes Black Glass Lot of Four NOS-Testing 12B4A Gebraucht SOME COUNTRIES DO NOT HAVEThis lot of four black glass Ken Rad 6D6 tubes was tested on our Jackson 648 Mutual Conductance tester for shorts, gas and transconductance. There were no shorts or gas. They tested (from left to right) as follows: 81%, 106%, 109%, and 117% respectively. New nominal is within a standard deviation of 1600 and the Jackson expresses this as a percentage. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT