Bogen CHB-20A Rebuild

[physics]

Hmm, after some thought and further reading, fusing the bias supply may not be the best idea as it adds a failure point that could result in damage to the output transformer. Plus it just trades certain power transformer failures for possible output transformer failure. Seems like something more sophisticated is needed, that'll kill plate (and/or screen?) voltage if the bias supply fails. For now I think I'll leave the bias fuse out.