"Richard Clark" wrote:
Unless you can supply specific references from Harris
about this 80% efficiency, then such comments remain
as suspect as before.

You may take what I wrote as being "from Harris," because I was part of
Harris FM Product Management for those transmitters before my retirement in
1999 (after 19 years there). I was responsible for documenting all
performance features and parameters published for the product line, using
numbers generated and approved by Engineering.

If the PAs alone were as (in)efficient as you imply with your calculations,
power consumption for the entire transmitter would be considerably higher.
Common sense should tell you that PA module efficiency would have to be much
higher than the efficiency calculations you posted in order for total power
consumption to be as stated on the Harris spec sheets.

I am still wondering about the odd entry of:
"Each module is conservatively rated to produce
850W of power into a system VSWR of 1.5:11."

Yes, that is a "typo," as you noted. Very good. It should read
"...VSWR of 1.5:1."

RF