[Elecraft] Question about 120 volts vs. 240 volts house supply toKPA 500

[jerry]

Love the efficiency of solid state amps.  I have a homebrew LDMOS unit, 
with
a single MRF1K50.  I get 1100W output running off an ordinary 15A 125VAC 
socket.
Didn't get anywhere near that with my Alpha 78.

                           - Jerry, KF6VB