Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Of Schmilsson It is dead quiet when

It is dead quiet when the preamp is muted and has excellent frequency response and dynamics

new in box RCA 8CX8 tube tested to spec on our Paul Hart-calibrated TV7/U

Top: smooth

Additional Characteristics: J-slot base

Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Of Schmilsson It is dead quiet whenThis new old stock testing matched pair of GE 12BH7A dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 56 59 while Tube Two measured 58 59 where minimum (65%) is 30 30. These tubes have gray plates; copper support rods; excellent flashing and top O getters. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT