5 General Electric GE Number Type 27 #27 Vacuum Tubes Lot Of Five Choral Stereo LP This tube has steel support

This tube has steel support rods

new in box CBS-Hytron 12BZ7 tube tested to spec on our TV7/U

Transconductance was 1900 for Tube One and 1800 for Tube Two where new/nominal is within one standard deviation of 1900

It sounds very good with light surface noise and the occasional click and pop

72/76 and 92/90 where minimum (65%) is 50/50 and 100% is 77/77

5 General Electric GE Number Type 27 #27 Vacuum Tubes Lot Of Five Choral Stereo LP This tube has steel supportThese five GE number type 27 tubes tested as good on our Paul Hart calibrated TV7 U. Transconductance readings are 30, 33, 34, 34 and 35 where minimum (65%) is 25. 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 OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY