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Old October 18th 03, 02:13 PM
Ian White, G3SEK
 
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Reg Edwards wrote:
"Ian White, G3SEK" wrote
Everybody knows that the meter only claims to indicate rho/SWR on its
"downstream" (load, antenna) side. It doesn't claim to say or know
anything about rho/SWR on the upstream (generator, TX) side.

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

Ian, there must by a dictation error in the foregoing. Would you care to
correct it ?

No - I meant exactly what I said. The meter can only indicate the
rho/SWR of whatever is connected downstream (load side) of the meter
itself.

Whatever is upstream is merely an RF source. Both the forward and
reflected readings are determined by the power level of the source
(obviously) but they are both affected in the same proportion, so the
rho/SWR result stays the same - as it must, because rho/SWR is only
affected by downstream conditions.

However, it must be admitted, when the only transmission line at the station
is between meter and the antenna such a mistake must be fairly common
amongst the ignorant.


We seem to be talking past each other, Reg, not to each other. Since
neither of us is "ignorant", each of us must be saying something that
the other one is missing.


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek
 
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