CBS Hytron Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead

CBS Hytron Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or BottleheadThis 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

These five GE number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

This hardback book is in very good condition

THERE IS RISK IN LIFE

Transconductance measured 1950/1950 micromhos for Tube One and 2000/2000 micromhos for Tube Two

The diodes measured 54 and 56

(New US-made 7408s typically test with plate current from the mid-teens to mid-30s with transconductance from 2300 micromhos or so

new in box Trigon UCH81 tube tested to spec on our Paul Hart-calibrated TV7/U

anode radiators for cooler operation and longer tube life

This lot of two new old stock

copper support rods and good flashing

two Hytrons and one Sylvania

It sounds very good with only an occasional click and pop