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Date: Mon, 2 Jan 2012 21:53:43 +0000
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From: "Douglas D. Williams" <kb4oer@gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Antennas
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Mal, you lost me on this one. Are you suggesting I (or we.....here in North
America) erect large verticals, inv L systems, Rhombics, and V beams in
order to receive EU LF signals?


I thought I was doing pretty well with my micro RX antenna!


Doug KB4OEr




On Mon, Jan 2, 2012 at 6:28 PM, mal hamilton <g3kevmal@talktalk.net> wrote:

> **
> LF es MF
> Reports from across the pond and other DX locations as far as Tenneesee
> and Kansas using micro probe antennas are great for QRSS speeds but not
> suitable for audio reception.
> Take 160 metres for example where it is normal to work world wide on cw
> but antennas in use are large verticals, inv L systems, Rhombics and V
> beams, therefore to have any chance of receiving signals at audio level on
> LF or MF large antennas of the calibre used on 160 metres are necessary.
> As well as TX at this QTH I also use large arrays for RX and often hear
> signals from NA that would not be audible with small loops, micro probes or
> ferrite sticks
> Recently on 500 I was able to copy a W stn 579 but a DL stn copied only on
> screen, when I asked what strength the signal was I got no
> reply!!!!!!!!!!!!! using a micro probe antenna.
> If a proper large antenna system is not used on LF es MF then there is
> virtually NIL chance of an audio report from across the pond for EU stns es
> vice versa
> Back some years ago I had audio reports from the Boston area but the
> antennas were proper wire arrays as used on 160 metres
> Small hand held antennas are fine for High Power  BC strength signals but
> not for low power amateur signals to be heard
> No commercial LF/MF station would even consider an antenna of the micro
> variety.
> When I was in the business some years ago on LF/MF Rhombics and V-Beams
> were the norm
> de mal/g3kev
>
>
>
>
>

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<div>Mal, you lost me on this one. Are you suggesting I (or we.....here in =
North America) erect large verticals, inv L systems, Rhombics, and V beams =
in order to receive EU LF signals?</div><div>=A0</div><div>=A0</div><div>I =
thought I was doing pretty well with my micro RX antenna!</div>
<div>=A0</div><div>=A0</div><div>Doug KB4OEr</div><div>=A0</div><div><br><b=
r>=A0</div><div class=3D"gmail_quote">On Mon, Jan 2, 2012 at 6:28 PM, mal h=
amilton <span dir=3D"ltr">&lt;<a href=3D"mailto:g3kevmal@talktalk.net">g3ke=
vmal@talktalk.net</a>&gt;</span> wrote:<br>
<blockquote style=3D"margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-=
color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class=
=3D"gmail_quote"><u></u>





<div bgcolor=3D"#ffffff">
<div><font face=3D"Arial">LF es MF</font></div>
<div><font face=3D"Arial">Reports from across the pond and other DX locatio=
ns as far=20
as Tenneesee and Kansas using micro probe antennas are great for QRSS speed=
s but=20
not suitable for audio reception.</font></div>
<div><font face=3D"Arial">Take 160 metres for example where it is normal to=
 work=20
world wide on cw but antennas in use are large verticals, inv L systems,=20
Rhombics and V beams, therefore to have any chance of receiving signals at =
audio=20
level on LF or MF large antennas of the calibre used on 160 metres are=20
necessary.</font></div>
<div><font face=3D"Arial">As well as TX at this QTH I also use large arrays=
 for RX=20
and often hear signals from NA that would not be audible with small loops, =
micro=20
probes or ferrite sticks</font></div>
<div><font face=3D"Arial">Recently on 500 I was able to copy a W stn 579 bu=
t a DL=20
stn copied only on screen, when I asked what strength the signal was I got =
no=20
reply!!!!!!!!!!!!! using a micro probe antenna.</font></div>
<div><font face=3D"Arial">If a proper large antenna system is not used on L=
F es MF=20
then there is virtually NIL chance of an audio report from across the pond =
for=20
EU stns es vice versa</font></div>
<div><font face=3D"Arial">Back some years ago I had audio reports from the =
Boston=20
area but the antennas were proper wire arrays as used on 160 metres</font><=
/div>
<div><font face=3D"Arial">Small hand held antennas are fine for=A0High Powe=
r=20
=A0BC strength signals but not for low power amateur signals to be=20
heard</font></div>
<div><font face=3D"Arial">No commercial LF/MF station would even consider a=
n antenna=20
of the micro variety.</font></div>
<div><font face=3D"Arial">When I was in the business some years ago on LF/M=
F=20
Rhombics and V-Beams were the norm</font></div>
<div><font face=3D"Arial">de mal/g3kev</font></div>
<div>=A0</div>
<div><font face=3D"Arial"></font>=A0</div>
<div><font face=3D"Arial"></font>=A0</div>
<div><font face=3D"Arial"></font>=A0</div></div>
</blockquote></div><br>

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