Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling Copper Support Rods 6V6GT Silver Top They measured (from left to

They measured (from left to right): 56

6 dB / -82

These five US-made 1AX2 tube tested to spec on our Paul Hart-calibrated TV7/U

Tube One drew 24

Matched Pair General Electric GE 12BH7 12BH7A Vacuum Tubes 12AU7 Substitute For Tube Rolling Copper Support Rods 6V6GT Silver Top They measured (from left toThis matched pair of GE 12BH7AA dual triodes was tested on our Maxi Preamp II for shorts, gas, noise and gain. There were no shorts, noise or gas and they tested as follows: Tube One: Gain (Mu (): 15. 6 15. 7 (16 is new nominal) Tube Two: Gain (Mu (): 16. 2 15. 4 These take a little more current than 12AU7s, so please be sure your device has some juice to spare. These tubes have copper support rods, six additional cooling holes per plate and