Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes Valves 12AU7 Substitute For Tube Rolling NOS-Testing 3AW2A Compactron anode radiators for cooler operation

anode radiators for cooler operation and longer tube life

This new old stock-TESTING matched pair of engraved base RCA Cunningham Radiotron number / type 30 tubes tested 34 and 36

This Sylvania 6BS8 tube tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of General Electric 12AU7A / ECC82 dual triodes was tested on our Hickok 600A for shorts

a clear bottle

Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes Valves 12AU7 Substitute For Tube Rolling NOS-Testing 3AW2A Compactron anode radiators for cooler operationThis 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