RCA Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead In Honolulu the title song defined the

the title song defined the summer it was released

This matched pair of Sylvania black plate 6CL6 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance readings are 15

These three US-made

46 and 52 where minimum (65%) is 35

RCA Black Plate 12BZ7 Vacuum Tube NOS NIB For Your Univalve Or Bottlehead In Honolulu the title song defined theThis new old stock, new in box RCA 12BZ7 tube tested to spec on our TV7 U. It measured 26 28 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. It is listed only as a good substitute for the 12AX7 which is only a fair substitute for the 12AU7 the recommended preamp tube for this headphone