Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Gebraucht 9U8 KY factory around the time

KY factory around the time of the GE takeover of Ken-Rad

58 and 67 where minimum (65%) is 48

Both have cracked bases -- as is almost-always the case with NU 6V6s -- which are

(Minimum (65%) is 46

new in box US-made number / type 89 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Gebraucht 9U8 KY factory around the timeThis 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 67 66 while Tube Two measured 70 68 where minimum (65%) is 30 30. These tubes have gray plates; copper support rods; excellent flashing; top harp lyre getters and black anode radiators for improved cooling and longer tube life. WE HAVE SCORES OF THOUSANDS OF