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Message-ID: <41AD0F546A9449DBA4357932408AFEF3@lindavideo>
From: "Ken" <ken.h.wright@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <678FAD4478574A8682D9BDE7D982EE11@lindavideo> <1f0624b90912220213l299aa2ebvd9a91a3fbd3b0983@mail.gmail.com>
Date: Tue, 22 Dec 2009 22:25:44 -0000
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Subject: Re: LF: PA0RDT Mini-Whip
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Hi Gary and Roelof.
Thankyou for your very useful comments regarding the positioning of th=
e PA0RDT Mini-Whip, I am fortunate that the radio room is remote from=
 the house and has a separate eathing system. If I increase my 500kHz=
 ERP to 1W, will I still be ok, or will protection diodes be required=
 on the input FET gate?

73
Ken
M0KHW
  ----- Original Message -----=20
  From: Gary - G4WGT=20
  To: rsgb_lf_group@blacksheep.org=20
  Sent: Tuesday, December 22, 2009 10:13 AM
  Subject: Re: LF: PA0RDT Mini-Whip


  Hi Ken,


  I have my Mini-Whip mounted with a short length of PVC tube on an1.5=
 metre aluminium stand off arm attached to my main steel (100mm square=
) mast at about 9 metres high. The coax runs down the mast & about 25=
 metres into the house. The coax braid is grounded at the base of the=
 mast were it enters the garage. I use that for my grabbers (off at th=
e moment due to technical reasons) & it operates quite well.


  73


  Gary - G4WGT.



  2009/12/21 Ken <ken.h.wright@btinternet.com>

    Hello All.

    I have been reading the recent posting regarding the PA0RDT Mini-W=
hip earthing etc, and am becoming rather confused.  I am hoping to con=
struct a Mini-Whip over the Christmas break, but have issues regarding=
 the positioning of it, the original drawings show it on a non metalli=
c mast, if I mount it high it will be within 2m vertical separation an=
d a 3m horizontal separation of the top horizontal section of the ante=
nna, the other option would be to mount it 1m above ground which will=
 give a 8m vertical separation and a 4m horizontal separation. Just to=
 add further problems if elevated vertically it is very close to veget=
ation, and at the 1m position it will be close to the neighbour=92s ch=
ain link fence. The Mini-Whip will be connected to the shack with appr=
oximately 25m of 50 ohm coax. Your comments will be gratefully receive=
d.



    73s

    Ken

    M0KHW




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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Dwindows-1252" http-equiv=3DConte=
nt-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.18854">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2 face=3DArial>Hi Gary and Roelof.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Thankyou for your very useful comment=
s regarding=20
the positioning of the PA0RDT Mini-Whip, I am fortunate that the radio=
 room is=20
remote from the house and has a separate eathing system. If I increase=
 my 500kHz=20
ERP to 1W, will I still be ok, or will protection diodes be required=
 on the=20
input FET gate?</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2 face=3DArial>73</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Ken</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>M0KHW</FONT></DIV>
<BLOCKQUOTE   style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT:=
 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"   dir=
=3Dltr>
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV     style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color:=
 black"><B>From:</B>=20
  <A title=3Dg4wgt@tiscali.co.uk href=3D"mailto:g4wgt@tiscali.co.uk">G=
ary -=20
  G4WGT</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Drsgb_lf_group@=
blacksheep.org     href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_l=
f_group@blacksheep.org</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, December 22,=
 2009 10:13=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: LF: PA0RDT Mini-=
Whip</DIV>
  <DIV><BR></DIV>Hi Ken,
  <DIV><BR></DIV>
  <DIV>I have my Mini-Whip mounted with a short length of PVC tube on=
 an1.5=20
  metre aluminium stand off arm attached to my main steel (100mm squar=
e) mast at=20
  about 9 metres high. The coax runs down the mast &amp; about 25 metr=
es into=20
  the house. The coax braid is grounded at the base of the mast were=
 it enters=20
  the garage. I use that for my grabbers (off at the moment due to tec=
hnical=20
  reasons) &amp; it operates quite well.</DIV>
  <DIV><BR></DIV>
  <DIV>73</DIV>
  <DIV><BR></DIV>
  <DIV>Gary - G4WGT.</DIV>
  <DIV><BR><BR>
  <DIV class=3Dgmail_quote>2009/12/21 Ken <SPAN dir=3Dltr>&lt;<A    =
 href=3D"mailto:ken.h.wright@btinternet.com">ken.h.wright@btinternet.c=
om</A>&gt;</SPAN><BR>
  <BLOCKQUOTE     style=3D"BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0p=
x 0px 0.8ex; PADDING-LEFT: 1ex"     class=3Dgmail_quote>
    <DIV bgcolor=3D"#ffffff">
    <DIV><FONT size=3D2 face=3DArial>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman">Hello All.</FONT></S=
PAN></P>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman">I have been reading=
 the recent posting regarding the=20
    PA0RDT Mini-Whip earthing etc, and am becoming rather confused.<SP=
AN>&nbsp;=20
    </SPAN>I am hoping to construct a Mini-Whip over the Christmas bre=
ak, but=20
    have issues regarding the positioning of it, the original drawings=
 show it=20
    on a non metallic mast, if I mount it high it will be within 2m ve=
rtical=20
    separation and a 3m horizontal separation of the top horizontal se=
ction of=20
    the antenna, the other option would be to mount it 1m above ground=
 which=20
    will give a 8m vertical separation and a 4m horizontal separation.=
 Just to=20
    add further problems if elevated vertically it is very close to ve=
getation,=20
    and at the 1m position it will be close to the neighbour=92s chain=
 link fence.=20
    The Mini-Whip will be connected to the shack with approximately 25=
m of 50=20
    ohm coax. Your comments will be gratefully received.</FONT></SPAN>=
</P>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman"></FONT></SPAN>&nbsp;=
</P>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman">73s</FONT></SPAN></P=
>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman">Ken</FONT></SPAN></P=
>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN lang=3DEN=
-GB><FONT size=3D3       face=3D"Times New Roman">M0KHW</FONT></SPAN><=
/P>
    <P style=3D"MARGIN: 0cm 0cm 0pt" class=3DMsoNormal><SPAN       lan=
g=3DEN-GB><SPAN></SPAN></SPAN>&nbsp;</P></FONT></DIV></DIV></BLOCKQUOT=
E></DIV><BR></DIV></BLOCKQUOTE></BODY></HTML>

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