Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Gebraucht 9U8 72 and 88 where minimum

72 and 88 where minimum (65%) is 33 and 100% is 50

58 and 67 where minimum (65%) is 48

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

Four are civilian and one is milspec

Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing Gebraucht 9U8 72 and 88 where minimumThis 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