Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing 0D3 Milspec new in box Philco Star

new in box Philco Star Light 6BK7B tubes tested to spec on our Paul Hart-calibrated TV7/U

came from an excellent lot and should work fine

wire snubbers for increased rigidity and lowered microphonics

new in box (for Tube One) matched pair of RCA 6C8G dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 49 for Tube One and 52 for Tube Two where minimum (65%) is 36 and 100% is 55

Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing 0D3 Milspec new in box Philco StarThis 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 48 50 while Tube Two measured 49 48 where minimum (65%) is 30 30 and 100% is 46 46. These tubes have gray plates; copper support rods; excellent flashing; top harp lyre getters and anode radiators for improved cooling and longer tube life. I have played them