CBS Hytron Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead Matched Pair 6K6 new in box RCA 6AG7

new in box RCA 6AG7 tubes tested to spec on our Paul Hart-calibrated TV7/U

24 and 24 where minimum (65%) is 25 and 100% is 38

This Zaerix 6CU7 / ECH42 tube tested to spec on our Paul Hart-calibrated TV7/U

engraved bases and narrow rectangular mica spacers

CBS Hytron Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead Matched Pair 6K6 new in box RCA 6AG7This new old stock, new in box CBS Hytron 12BZ7 tube tested to spec on our TV7 U. It measured 36 39 where minimum (65%) is 18 18 and 100% is 28 28. It has shiny black plates; a goal post getter; copper 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