[Boatanchors] Measuring Xfmr Capacity

[Michael D. Harmon]

If you have a copy of the ARRL handbook (pretty much any year). look in 
the "Power Supplies" section in the front part of the handbook.  They 
have a nomograph that shows approximate power handling capacity in watts 
given the cross-sectional area of the core.  This will be in the section 
which talks about windings, copper losses, inductances, etc.

HTH,
Mike, WB0LDJ