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Old November 6th 07, 01:59 AM posted to rec.radio.amateur.antenna
Sal M. Onella Sal M. Onella is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 442
Default question about wire antenna and tuner


"Cecil Moore" wrote in message
...
Sal M. Onella wrote:
What did I say wrong?


You implied that reflected energy is always dissipated
in the transmitter.


Yeah -- well, I was trying to keep it simple, as I said to start the second
paragraph.

Tell me something, please: with a mismatched load, isn't overheating of the
transmitter sometimes a risk? (Assume no tuner, 50 feet of coax and an
assortment of attempted HF transmit freqs.)

How much of the reflected energy is dissipated in the
source depends upon the interference pattern at the
source. As w7el points out, dissipation in a voltage
source can be reduced to zero by the astute choice of
a special best case of complete constructive
interference in the direction of the load.


.... and I think I see an example of the "astute choice" illustrated by the
"ladder-line length selector for our all-band dipole" on your website. I
get that and I like it but it would never have occurred to me -- probably
because of lack of wave theory on my part. Am I right?

Thanks.