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Message-ID: <618180.72059.qm@web28509.mail.ukl.yahoo.com>
Date: Fri, 15 Apr 2011 13:40:26 +0100 (BST)
From: Chris Osborn <g3xiz@yahoo.co.uk>
To: LF Group <rsgb_lf_group@blacksheep.org>
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Subject: LF: VLF - vertical probe measurements
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LF,
=A0
Acting on advice I have installed a whip aerial (probe)=A0on top of a mast=
 at the=A0boundary of my property.
This is in order to monitor my VLF transmissions and to provide a referenc=
e level for any system improvements.
=A0
I noticed that the probe's pick-up voltage is directly proportional to=A0m=
y PA's supply current.
Assuming that the PA efficiency doesn't change drastically with current th=
en would I be correct in assuming that the probe's voltage is directly pro=
portional to the radiated power?
=A0
I was expecting a square law relationship . .=20
=A0
73
Chris G3XIZ

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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D=
"top" style=3D"font: inherit;"><DIV>LF,</DIV>
<DIV>&nbsp;</DIV>
<DIV>Acting on advice I have installed a whip aerial (probe)&nbsp;on top=
 of a mast at the&nbsp;boundary of my property.</DIV>
<DIV>This is in order to monitor my VLF transmissions and to provide a ref=
erence level for any system improvements.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I noticed that the probe's pick-up voltage is directly proportional=
 to&nbsp;my PA's supply current.</DIV>
<DIV>Assuming that the PA efficiency doesn't change drastically with curre=
nt then would I be correct in assuming that the probe's voltage is <U>dire=
ctly proportional</U> to the radiated power?</DIV>
<DIV>&nbsp;</DIV>
<DIV>I was expecting a square law relationship . . </DIV>
<DIV>&nbsp;</DIV>
<DIV>73</DIV>
<DIV>Chris G3XIZ</DIV></td></tr></table>

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