So I'm helping a buddy out with his 1976 Silverface Super Reverb. The amp has been gone through by a previous tech. All electrolytic caps replaced, and the screen resistors on the power tubes. But oddly, the previous guy left the death cap in place, and wired the auxiliary power outlet backward - with hot on the neutral side . I fixed that mess already, and now I'm using @robrob 's calculator to set the bias. Here are my numbers: Voltage on both power tube plates is 460v. Voltage drops between the plates and the OT center tap is 1.55 and 1.50. Resistance from both plates to center tap is 50 ohms. So bias current is 1.55v/50ohm = 0.031 amps. 460v x 0.031amps = 14.26 watts. Is all that done correctly? Entered in the calculator: I'm not sure how to read these results. Anyone? Please advise. Second, the tremolo is barely audible, and makes a ticking sound which speeds up along with the Speed pot. Two of the three tremolo caps have been replaced already. I've tried a couple of known good 12AX7s in the tremolo socket. Reverb works well. I have a working footswitch for the tremolo. What's next?