[Amps] 500kw trnsmitter?

[Gary Smith]

A little ot here, but... during ww II there was a transmitter that was an instant tune 500-600 kw monster that had the nickname of "aspidistra." 

Was used to send out propaganda from england to germany during that time of struggle, does any one know who built the thing? Or its frequency range?

Have found and read some info on it, but no reference as to who the manufacturer was.  Am aware that it was built in the US, but the FCC nixed its stateside usage, so off to merry olde it went.

Thanks to all on this fine list,

Gary, wa6fgi