Richard Harrison wrote:
Roy Lewallen, W7EL wrote:
"A real analysis of energy flow involves calculating the power at
various points and times in the circuit or transmission line of
interest."

Yes. Bird Electronic Corporation has done a good job of this with its
"Thruline" wattmeter for several decades.
. . .

No, the Bird wattmeter measures only the average power and only at one
point. That's vastly different from what I described, which is
instantaneous power as a function of time at many points along the line.
A complete analysis of energy flow would include equations for the power
as a function of time and position. You're sadly mistaken if you think
you're getting this information from your Bird wattmeter.

Roy Lewallen, W7EL

Roy Lewallen, W7EL wrote:
"No, the Bird wattmeter measures only the average power and only at one
point."

True. The Bird wattmeter measures average power, the same as any a-c
wattmeter, and only at the point of measurement. If the line is lossy,
the numbers are higher near the generator, and difference between
forward numbers, for example, is an indication of loss between insertion
points.

Best regards, Richard Harrison, KB5WZI

(Richard Harrison) wrote in news:9684-461D5877-
:

Roy Lewallen, W7EL wrote:
"No, the Bird wattmeter measures only the average power and only at one
point."

True. The Bird wattmeter measures average power, the same as any a-c

.... where "measures" and "average" are used quite loosely.

Owen

Roy Lewallen wrote:
You're sadly mistaken if you think
you're getting this information from your Bird wattmeter.

Richard seems to be getting all the information from
the Bird that he needs. However, your psychological
compulsion to measure something besides average power
is a perplexing need indeed.
--
73, Cecil http://www.w5dxp.com

Cecil Moore wrote:

...
Richard seems to be getting all the information from
the Bird that he needs. ...

Better to get 'yer information from the bird, then to be given the bird.
Seems to be more than one bird "flying" around here! chuckle

Regards,
JS