The 5Z4G is only good for 125ma your amp has two 300Bs at 70ma each and two C3gs at 20ma each
This is 180ma plus recharge current to the capacitors. This is why they are blowing up.
Clayton's mono block amps only have one 300B and one C3g per amp this adds up to 90ma this is fine
for a 5Z4.
That actually makes a lot of sense. Math, who would have thought I'd ever need it.
Thanks for the info. The bullethole plates in the 5Z4G are the prettiest plates ever though. They're now being used as decoration.