This should do the job.
Like my friend Dave, ZL3FJ, I am also "in waiting" on a 500kHz
allocation in ZL land.
I have done some testing on my "modded" IC706
Mk2 using a thermal RF
ammeter and dummy load.
About 30 watts maximum
output was obtained although the waveform was
nothing to write home about.
My attempts to get more output power
were rewarded with a much poorer
waveform and no more output. No
doubt, some filtering could greatly reduce
the obvious harmonic content.