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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <618180.72059.qm@web28509.mail.ukl.yahoo.com> <4DA840AF.6040507@iup.uni-heidelberg.de>
Date: Fri, 15 Apr 2011 15:23:48 +0100
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Subject: Re: LF: VLF - vertical probe measurements
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Hi Chris Ah it just depends what you are measuring it with as well !!
Alan G3NYK

----- Original Message -----=20
From: "Stefan Sch=E4fer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Friday, April 15, 2011 1:57 PM
Subject: Re: LF: VLF - vertical probe measurements


> Hello Chris,
>
> I would expect a sqare law relationship as well since the probe is=
 a
> capacitive divider and thus the voltage should be directly proportio=
nal
> to the antennas voltage. And this rises with sqrt(2) x the power...
>
>
> 73, Stefan
>
>
> Am 15.04.2011 14:40, schrieb Chris Osborn:
> > LF,
> > Acting on advice I have installed a whip aerial (probe) on top of=
 a
> > mast at the boundary of my property.
> > This is in order to monitor my VLF transmissions and to provide a
> > reference level for any system improvements.
> > I noticed that the probe's pick-up voltage is directly proportiona=
l
> > to my PA's supply current.
> > Assuming that the PA efficiency doesn't change drastically with
> > current then would I be correct in assuming that the probe's volta=
ge
> > is _directly proportional_ to the radiated power?
> > I was expecting a square law relationship . .
> > 73
> > Chris G3XIZ
> >
>