Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing

Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-TestingThis 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

new in box GE 6GM6 tubes tested to spec on our Paul Hart-calibrated TV7/U

There are no technical faults with this pressing and any faults come from the source -- 78 records in this case

EIA Factory Codes: RCA livery

RCA Living Stereo

This (most likely) Sylvania-MANUFACTURED Wizard-BRANDED number / type 80 rectifier tube was tested on our Paul Hart-calibrated TV7/U

These milspec Ken-Rad JAN-CKR-6L7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

gray plates and bottom

Transconductance readings are 27

This milspec RCA 1642 dual triode was tested on our Paul Hart-calibrated TV7/U

There are practically-no pops and ticks

This LP sounds very good

One tube has far more visible getter flashing because of the getter's orientation deeper in the bottle