On May 24, 11:32*pm, (Richard Harrison)
wrote:
Cecil Moore, W5DXP wrote:
"Seems to me, the highest efficiency would be achieved by a source with
zero source impedance."

Me too, but zero source impedance does not match the load as required
for maximum power transfer.

A 60 Hz Power Generation Plant operates at high efficiency, not at the
maximum power transfer point. If they were 50% efficient, they would
go out of business. (That's what Edison expected.) Why is maximum
power transfer desirable in ham transmitters? Is such a design the
highest power/cost ratio? Is it possible to build an output amp with a
10 ohm source impedance designed to be 80% efficient? 1 ohm source
impedance designed to be 98% efficient? Is co$t the driving parameter?
--
73, Cecil, w5dxp.com