- May 17, 2020
Ok I tried the other side of the tube and got roughly the same results across R17: 109V / 74V. I then tried the original tube and the results seemed worse: 133V / 110V. I checked all connections again and verified that the resistors on the mic are correct and wired properly. Still not sure what’s going on.Yes, you can try the other tube half first before switching back to the 12AX7.