WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
My RH84 bias (cathode bias) was dial in at 11.6 plate disipation with a pair of JJ but when
i bought a new pair of TAD el84 to try out now my bias is way up at 12.55watts plate disipation.
can some one explain why its doing that?