Sylvania Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead October 07 2023 it is sold as-is

it is sold as-is

This lot of three Arcturus 6L7 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

This new old stock-testing matched pair of milspec Raytheon black glass VT-107-A / JAN-CRP-6V6-GT output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

67 and 74 where minimum (65%) is 53

Transconductance measured 62 for Tube One and 64 for Tube Two where minimum (65%) is 40

Sylvania Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead October 07 2023 it is sold as-isThis new old stock, new in box Sylvania 12BZ7 tube tested to spec on our TV7 U. It measured 25 23 where minimum (65%) is 18 18 and 100% is 28 28. It has black plates; an O getter; steel support rods and outstanding flashing. I have listened to it in my Bottlehead Crack headphone amplifier and it sounded great. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL