[Rodzilla]

yes i plan to take the selenium out...the 100v figure is my best guess after measuring the output voltage of the selenium rectifier with the radio playing,it puts out 108v-109v..

Accounting for the increase in household AC voltage over the last 60 years...100v seems a reasonable assumption.most of what I've read about selenium rectifiers quote about 85% efficiency give or take a few %...108-109V is about 87% of today's 125V...the same 87% of 117 is about 101v...i think a 100V target going to the filter caps is probably a "safe" option,or at least probably within a small tolerance of the original design...I'm aware I'm ignoring the very small voltage drop of a silicon diode,but i don't see a volt or so as terribly significant in this,the circuit should easily accommodate that little bit of variance...sorry if i didn't explain that very well.