The power factor case is semantically different than the SWR case in the
following way: With SWR, energy is flowing in both directions at near the speed
of light. If the reflected signal is the exact same frequency as the forward
signal (as in the case where it is a reflection of a signal at a
Very interesting theory. I am teaching SWR at present to my third
year college students. Could be a good discussion point since they
have already studied power factor. However, SWR can exist with a
purely resistive mismatched load, so it needs a bit of modification to
take all into account.
73
Good point Nigel. Back in the '60s I designed a video distribution
amplifier for receiver video to tape recorders, O scopes and the like
and I matched the input impedance to prevent reflections on the video
line from distorting the signal. The output impedance of my amplifier
was as low as I
-
[EMAIL PROTECTED] On Behalf Of Nigel Johnson
Sent: Saturday, September 20, 2008 7:26 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Does anyone else think of Power Factor
like SWR?
Very interesting theory. I am teaching SWR at present to my third
year college
--- In Repeater-Builder@yahoogroups.com, kb9bpf [EMAIL PROTECTED] wrote:
Since I'm way more into RF than industrial power distribution, I've
always been able to think of power factor on the electrical power
grid in terms similar to antenna system reflections, which are
commonly measured in
Normally all this is taken into the design and operation
of the distribution grid.
It's quite possible to have generation plants simply coast
portions or all of their equipment on the grid as correction
factor in hydro operation sometimes known as motoring
the prime mover.
In the very
also known as 'rotary condenser' operation
Gary
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, September 18, 2008 11:24 AM
Subject: [Repeater-Builder] Re: Does anyone else think of Power Factor like SWR?
Normally all this is taken
To answer the question, I don't.
Look at it this way. The AC supply to your house, for example, is a
low impedance; it can supply hundreds of amps (the transmitter). The
100 watt lamp (antenna/load) in your house is a relatively high
impedance compared to the supply. There is no impedance
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