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Old May 18th 11, 09:33 PM posted to rec.radio.amateur.antenna
Wimpie[_2_] Wimpie[_2_] is offline
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First recorded activity by RadioBanter: Mar 2008
Posts: 329
Default Transmitter Output Impedance

On 18 mayo, 19:46, Cecil Moore wrote:
On May 18, 11:56*am, K7ITM wrote:

Cecil, just HOW do you propose to MEASURE the effect you describe, as
seen at the transmitter's output port, using only our HF ham
transmitter/PA that transmits a signal with a maximum bandwidth of
perhaps 10kHz?


I don't have a proposal and am just pointing out some of the technical
problems associated with some of the methods being proposed. FYI, when
one uses a model that presupposes faster than light propagation speeds
to try to explain something happening in the real world, one should
expect some skepticism *- unless one can prove that he is using
entangled photons. :-)
--
73, Cecil, w5dxp.com


Hello Cecil,

Could you please explain why the lumped circuit approach used by many
people across the world presupposes faster than light propagation (as
I can't)?

In my opinion it only presupposes that speed of light is not of
importance and if it does, you can model that very easy by adding some
additional lumped components in many cases.

Just take a circuit diagram of your rig, lumped components all over
the place and if there are coaxial cables, they are just for
transporting a signal from one place to another place. Did you ever
used a circuit simulator, if so, did you model every capacitor,
resistor, etc with a transmission line model?

You may evaluate for yourself a CLC section and see what the output
versus input does. Of course you could also put it in some circuit
simulator. And again you are trying to introduce non-relevancy into
the topic.

Wim
PA3DJS
www.tetech.nl