Reg Edwards wrote:


Perhaps this is a dumb question Reg, but if the transmission line
isn't
there, how does RF get from the transmitter to the antenna?

Thanks, ac6xg

=============================

The 50-ohm line on which the SWR is supposed to be measured is between
the transmitter and the so-called SWR meter.

No, the SWR being measured is on the load side of the meter.

If the transmitter is connected directly to the meter, (as it usually
is, very often it is inside the transmitter on the front panel) there
is no line and no SWR on it which can be measured.

Bzzzt, wrong answer. SWR is measured on the output side of the meter,
not the input.

Neverthess, the meter still provides a reading of SWR. Obviously it
is telling lies and causes confusion and misunderstanding to novices
about what is really happening within their equipment. In fact, just
as it has been doing since Joker, Richard Clark, entered the thread.

Some people force themselves to imagine a 1/4-wavelength transmission
inside the little box in a vain endeavor to explain how an SWR meter
works.

That would be inane.

All one need do is realize the meter measures toward the load.

Actually the meter indicates whether or not the transmitter is loaded
with 50-ohms - and nothing else. It is an HF resistance bridge to
which its circuit reduces.

But, as I say, it is a very useful, almost indispensible instrument.
It is a TLI.
----
Reg.



--
Jim Pennino

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