Re: AZ31 as rectifier for a stereo Mullard 3-3?
The Mullard 3-3 needs a B+ of 310 V (measured after the resistor coming from the EZ80). I do not have a schematic of the Ferguson 289A but since it is running a pair of EL33's in push-pull at probably Vak = 250 V, I doubt if the B+ in the Ferguson 298A is 310 V.
But maybe you will come close to the 310 V using silicon rectifiers instead of a valve rectifier.
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Robert
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