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From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
References: <51D975FA.60008@virginbroadband.com.au> <51DD1434.2030300@virginbroadband.com.au> <51DD2EB1.80303@aol.com>
Date: Wed, 10 Jul 2013 08:04:20 -0400
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Subject: Re: Fwd: Re: LF: VK1OD's analysis of the MiniWhip antenna
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Pat

Don't believe they are 'loading up' the spacecraft itself against the =
universe ;~). Antennas take the form of monopoles (spacecraft is the =
'groundplane'), dipoles, quad helix etc.

Jay W1VD  WD2XNS  WE2XGR/2=20
  ----- Original Message -----=20
  From: pat=20
  To: rsgb_lf_group@blacksheep.org=20
  Cc: edgar=20
  Sent: Wednesday, July 10, 2013 5:51 AM
  Subject: Re: Fwd: Re: LF: VK1OD's analysis of the MiniWhip antenna


  I don't know if my previous posts arrived but I still prefer to think =
that a "small" antenna is one plate of a capacitor and the rest of the =
universe is the other. This then enables the spacecraft antenna to work. =
The universe is not a great big empty space!

  73 de Pat


  On 10/07/13 08:58, edgar wrote:


    I sent this message two days ago and I did not see it arrive.

    Although the subject is now out of context, I would like some =
comment on my question.

    Regards, Edgar
    Moonah, Tasmania.


    -------- Original Message -------- Subject:  Re: LF: VK1OD's =
analysis of the MiniWhip antenna=20
          Date:  Mon, 08 Jul 2013 00:06:50 +1000=20
          From:  edgar <edgarjtwining@virginbroadband.com.au>=20
          To:  rsgb_lf_group@blacksheep.org=20


Hi Pieter-Tjerk,

If that is the case, and all the parts are at the same potential, how=20
does a space craft, radio controlled model aeroplane

get their signals?

Surely every conductor in the unit will have a difference in potential=20
due to being in a electromagnetic field.

Even in the legs of the FET. Although the potential will be extremely =
small.

Surely it is only necessary to have a change of the Vgs voltage of the =
FET.

So the geometry of the antenna has to be made to allow this to occur.

Regards, Edgar
Moonah, Tasmania.


--=20
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3DISO-8859-1">
<META content=3D"MSHTML 6.00.2900.2180" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY text=3D#000000 bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Pat</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Don't believe they are 'loading up' the =
spacecraft=20
itself against the universe ;~). Antennas take the form of monopoles =
(spacecraft=20
is the 'groundplane'), dipoles, quad helix etc.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Jay W1VD&nbsp; WD2XNS&nbsp;=20
WE2XGR/2</FONT>&nbsp;</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dg4gvw@aol.com href=3D"mailto:g4gvw@aol.com">pat</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Drsgb_lf_group@blacksheep.org=20
  =
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A=20
  title=3Dedgarjtwining@virginbroadband.com.au=20
  href=3D"mailto:edgarjtwining@virginbroadband.com.au">edgar</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, July 10, 2013 =
5:51=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Fwd: Re: LF: =
VK1OD's=20
  analysis of the MiniWhip antenna</DIV>
  <DIV><BR></DIV>
  <DIV class=3Dmoz-cite-prefix>I don't know if my previous posts arrived =
but I=20
  still prefer to think that a "small" antenna is one plate of a =
capacitor and=20
  the rest of the universe is the other. This then enables the =
spacecraft=20
  antenna to work. The universe is not a great big empty =
space!<BR><BR>73 de=20
  Pat<BR><BR><BR><BR>On 10/07/13 08:58, edgar wrote:<BR></DIV>
  <BLOCKQUOTE cite=3Dmid:51DD1434.2030300@virginbroadband.com.au=20
type=3D"cite"><BR>
    <DIV class=3Dmoz-forward-container>I sent this message two days ago =
and I did=20
    not see it arrive.<BR><BR>Although the subject is now out of =
context, I=20
    would like some comment on my question.<BR><BR>Regards, =
Edgar<BR>Moonah,=20
    Tasmania.<BR><BR><BR>-------- Original Message --------=20
    <TABLE class=3Dmoz-email-headers-table cellSpacing=3D0 =
cellPadding=3D0 border=3D0>
      <TBODY>
      <TR>
        <TH vAlign=3Dbaseline noWrap align=3Dright>Subject: </TH>
        <TD>Re: LF: VK1OD's analysis of the MiniWhip antenna</TD></TR>
      <TR>
        <TH vAlign=3Dbaseline noWrap align=3Dright>Date: </TH>
        <TD>Mon, 08 Jul 2013 00:06:50 +1000</TD></TR>
      <TR>
        <TH vAlign=3Dbaseline noWrap align=3Dright>From: </TH>
        <TD>edgar <A class=3Dmoz-txt-link-rfc2396E=20
          href=3D"mailto:edgarjtwining@virginbroadband.com.au"=20
          =
moz-do-not-send=3D"true">&lt;edgarjtwining@virginbroadband.com.au&gt;</A>=
</TD></TR>
      <TR>
        <TH vAlign=3Dbaseline noWrap align=3Dright>To: </TH>
        <TD><A class=3Dmoz-txt-link-abbreviated=20
          href=3D"mailto:rsgb_lf_group@blacksheep.org"=20
          =
moz-do-not-send=3D"true">rsgb_lf_group@blacksheep.org</A></TD></TR></TBOD=
Y></TABLE><BR><BR><PRE>Hi Pieter-Tjerk,

If that is the case, and all the parts are at the same potential, how=20
does a space craft, radio controlled model aeroplane

get their signals?

Surely every conductor in the unit will have a difference in potential=20
due to being in a electromagnetic field.

Even in the legs of the FET. Although the potential will be extremely =
small.

Surely it is only necessary to have a change of the Vgs voltage of the =
FET.

So the geometry of the antenna has to be made to allow this to occur.

Regards, Edgar
Moonah, Tasmania.


</PRE><BR></DIV><BR></BLOCKQUOTE><BR><BR><PRE class=3Dmoz-signature =
cols=3D"72">--=20
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK</PRE></BLOCKQUOTE></BODY></HTML>

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