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Date: Wed, 12 May 2010 20:31:33 +0100
Message-ID: <AANLkTikfkhPtxZwL-80JQ_faqD3maYCeHZMF7nrFNaSo@mail.gmail.com>
From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: Re: LF: Dreamer RX
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Mal,

My "dreamers band" NoV has been with OFCOM since mid March. I chased it
again last week. The hold-up is the Met Office, who have to vet sub-9kHz
non-military applications. The men at OFCOM seem very keen to support these
applications.

In the meantime I'm experimenting with local induction and conduction at
1-9kHz using 4W. This is quite useful as I've been playing with various
ideas for loops and receivers. I'm no expert and I'm probably rediscovering
things that people knew long ago. Still, it keeps me out of mischief and I'm
enjoying it.

When I have the RX system optimised listening "by ear" I intend to try my PC
out in the fields with QRSS or WSPR to extend range. Best DX is 0.35kms so
far - only 899kms short of Stefan's best DX, hi. When TXing with grounded
electrodes I found that a loop works better at the far end than grounded
electrodes. I also suspect the distance is effected by soil moisture between
the probes at the TX end (size of the underground loop?) as on Monday I
could hear my signals further than today and everything else was unchanged.

I've yet to try a voltage probe RX at sub-9kHz. The 80cm loop does seem to
be useful as one can null mains hum and other noise sources. Close to houses
and overhead cables the mains hum fog is appalling, but this drops very
rapidly I've found as one moves away into open fields. Then the issue is
electric fences (I think) pulsing away.

73s
Roger G3XBM


On 12 May 2010 19:04, mal hamilton <g3kevmal@talktalk.net> wrote:

>  LF/MF
> How many have a RX capable of working efficiently on 9 kHz, proper antenna
> etc. Even on the higher LF/MF bands the weakness seems to be a good RX
> SYSTEM.
> Something better than a probe, small loop is preferable especially on 9 kHz
> To date in the UK  the uptake dreamers seem minimal, how many are actually
> listening, and how many NOV'S have been either issued applied for?
>
> G3KEV
>
>
>



-- 
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM    GQRP 1678      ISWL G11088

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Mal,<br><br>My &quot;dreamers band&quot; NoV has been with OFCOM since mid=
 March. I chased it again last week. The hold-up is the Met Office, who ha=
ve to vet sub-9kHz non-military applications. The men at OFCOM seem very=
 keen to support these applications.<br>
<br>In the meantime I&#39;m experimenting with local induction and conduct=
ion at 1-9kHz using 4W. This is quite useful as I&#39;ve been playing with=
 various ideas for loops and receivers. I&#39;m no expert and I&#39;m prob=
ably rediscovering things that people knew long ago. Still, it keeps me ou=
t of mischief and I&#39;m enjoying it. <br>
<br>When I have the RX system optimised listening &quot;by ear&quot; I int=
end to try my PC out in the fields with QRSS or WSPR to extend range. Best=
 DX is 0.35kms so far - only 899kms short of Stefan&#39;s best DX, hi. Whe=
n TXing with grounded electrodes I found that a loop works better at the=
 far end than grounded electrodes. I also suspect the distance is effected=
 by soil moisture between the probes at the TX end (size of the undergroun=
d loop?) as on Monday I could hear my signals further than today and every=
thing else was unchanged.<br>
<br>I&#39;ve yet to try a voltage probe RX at sub-9kHz. The 80cm loop does=
 seem to be useful as one can null mains hum and other noise sources. Clos=
e to houses and overhead cables the mains hum fog is appalling, but this=
 drops very rapidly I&#39;ve found as one moves away into open fields. The=
n the issue is electric fences (I think) pulsing away.<br>
<br>73s<br>Roger G3XBM<br><br><br><div class=3D"gmail_quote">On 12 May 201=
0 19:04, mal hamilton <span dir=3D"ltr">&lt;<a href=3D"mailto:g3kevmal@tal=
ktalk.net">g3kevmal@talktalk.net</a>&gt;</span> wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px sol=
id rgb(204, 204, 204); padding-left: 1ex;">






<div bgcolor=3D"#ffffff">
<div><font face=3D"Arial" size=3D"2">LF/MF</font></div>
<div><font face=3D"Arial" size=3D"2">How many have a RX capable of working=
 efficiently=20
on 9 kHz, proper antenna etc. Even on the higher LF/MF bands the weakness=
 seems=20
to be a good RX SYSTEM.</font></div>
<div><font face=3D"Arial" size=3D"2">Something better than a probe, small=
 loop is=20
preferable especially on 9 kHz</font></div>
<div><font face=3D"Arial" size=3D"2">To date in the UK=A0 the uptake dream=
ers seem=20
minimal, how many are actually listening, and how many NOV&#39;S have been=
 either=20
issued applied for?</font></div>
<div>=A0</div>
<div><font face=3D"Arial" size=3D"2">G3KEV</font></div>
<div><font face=3D"Arial" size=3D"2"></font>=A0</div>
<div><font face=3D"Arial" size=3D"2"></font>=A0</div></div>
</blockquote></div><br><br clear=3D"all"><br>-- <br><a href=3D"http://g3xb=
m-qrp.blogspot.com/">http://g3xbm-qrp.blogspot.com/</a><br><a href=3D"http=
://www.g3xbm.co.uk">http://www.g3xbm.co.uk</a><br><a href=3D"http://www.yo=
utube.com/user/g3xbm">http://www.youtube.com/user/g3xbm</a><br>
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088<br>

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