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Old May 21st 09, 07:30 PM posted to rec.radio.amateur.antenna
[email protected] wimabctel@tetech.nl is offline
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First recorded activity by RadioBanter: Feb 2009
Posts: 11
Default ATU: Correct way to specify impedance range

On 21 mayo, 19:41, Cecil Moore wrote:
K7ITM wrote:
... we ought to hold the ham
manufacturers' feet to the fire to do something similar.


I suspect their average amateur radio customer
doesn't understand the meaning of 1000+j1000
much less comprehend graphs on a Smith Chart.

I recently published an article over on eHam.net
that contained a Smith Chart. One of the reactions
was that Smith Charts are obsolete and have been
replaced by software programs that just provide
the answers without all the effort and pain involved
with understanding a Smith Chart.

One doesn't need to know anything about hyperbolic
trig functions any more. Just point and click.
--
73, Cecil, IEEE, OOTC, *http://www.w5dxp.com


Hello Cecil,

I was expecting that this only happens in the Netherlands. I have
some (modern) software where the default plot method is Schmit
Chart...

I agree with the contour plot on a Smith Chart showing losses (and
power handling) for Antenna Tuners.

Best regards,

Wim
PA3DJS
www.tetech.nl
forget first three letters of the alphabet in the PM