Since my DC filament tests, I've been thinking a lot about the 'mixed fixed' bias setting. I think this is a compromise in a good way.
For instance, a 50% cathode/50% fixed scheme would allow much of the cathode bias benefits (ie soft clipping) while still allowing total control over bias current in each channel, even allowing swapping of KT88s and EL34s which could never be swapped in a cathode biased amp (unless you get out the soldering iron).
Of course, some still appreciate the safety of cathode biasing. I would just suggest fusing the HV secondary CT. That bit of insurance would be good for every amp.
Comments?
Shannon