CJ said:the heater winding in a big pwr xfmr could probably carry 20 amps or more, that is how big the wire is. primary wire is also usually way overkill, so no problems on that side either. the 7.5 amps spec is used so that you get 6.3 with a load of 7.5 amps, you can go up or down on the load and that 6.3 will move up and down just a tad.
Thank you sir
I do not believe that you are wrong about it ... the problem would be if it did not work out that way after you have bought a transformer for a lot of money?
I know that the transformers used in those 100W Marshalls are specified just enough to handle those values
Best regards
/John