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Just replaced the PT in an Orange OR80 90s reissue and noticed the HT fuse position is after the main filter caps. Earlier models used the same F1A fuse before the caps but I don't recall nuisance blowing on the older amps. Anyone know why the fuse was moved? Neither position gives full protection in the event of a shorted cap, but there's a better chance with the older circuit - from 0% to 50% chance.
Here's the old schematic (essentially the same amp but the OR80 has just a pair of output tubes);
Here's the old schematic (essentially the same amp but the OR80 has just a pair of output tubes);