"Ian Field"


I'd go for 2x 4007's in series to be on the safe side - not forgetting
equal value x-class capacitors in parallel with each diode to damp &
equalise any spikes.

** Quite unnecessary - any voltage spikes are clamped by the first filter
cap.

Class X caps are more likely to fail than 1N4007 diodes are.


As well as an added sag resistor,

** Not essential - there will be only 30 volts increase in the B+.


you need to make sure each rectifier path is protected by a fuse,

** Absolutely un-necessary.


when silicon rectifiers fail short circuit - they do it for keeps.

** So what?

The AC supply fuse will blow immediately.

You are obviously not very familiar with valve guitar amps.


..... Phil