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References: <4A181EEC.5050600@btconnect.com>
Date: Sat, 23 May 2009 17:49:28 +0100
Message-ID: <8bf118410905230949w19e40e09x2a6f0ac77c72287a@mail.gmail.com>
From: Dave Pick <daveyxm@googlemail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: First Portable Trip
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Richard

Just think topband with the dimensions scaled accordingly, you were
therefore using a 50ft inverted L with a less than 2m high vertical section
getting lower.... and 12W. I think a kite is the only way with QRP!
I saw something on the grabber though, round about 2pm local?

Dave

2009/5/23 Richard Newstead <g3cwi@btconnect.com>

> Not a great success. Tried a 200ft inverted L with 7m vertical section fed
> against 3 radials each between 50 and 100ft long. The final 100ft was very
> low - within 1 metre of the ground.
>
> Did not succeeded in tuning aerial up in link configuration. Tried tapping
> the feeder at various points on the main coil but this reduced the Q
> dramatically and the RX and TX performance were very poor. In configurations
> where the RX performance was good and the Q high, there was little on no
> aerial current on transmit. The only configuration that gave some antenna
> current was nearly useless on receive. Connecting a radial to a metal fence
> detuned things so much that I go nowhere like that.
>
> Heard GW0HXO's beacon at reasonable strength and GW3UEP's beacon - just.
> Called CQ quite a few times. No takers.
>
> Band was still noisy even on relatively remote hilltop with horrible
> "line-timebase" type burble drifting across band.
>
> Clearly more work required to get a viable system. Tips?
>
> 73
>
> Richard
> G3CWI
>
>
>


-- 
G3YXM IO92BK Birmingham UK

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Richard<br><br>Just think topband with the dimensions scaled accordingly, yo=
u were therefore using a 50ft inverted L with a less than 2m high vertical s=
ection getting lower.... and 12W. I think a kite is the only way with QRP!<b=
r>
I saw something on the grabber though, round about 2pm local?<br><br>Dave <b=
r><br><div class=3D"gmail_quote">2009/5/23 Richard Newstead <span dir=3D"ltr=
">&lt;<a href=3D"mailto:g3cwi@btconnect.com">g3cwi@btconnect.com</a>&gt;</sp=
an><br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 2=
04, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Not a great success=
. Tried a 200ft inverted L with 7m vertical section fed against 3 radials ea=
ch between 50 and 100ft long. The final 100ft was very low - within 1 metre=20=
of the ground.<br>

<br>
Did not succeeded in tuning aerial up in link configuration. Tried tapping t=
he feeder at various points on the main coil but this reduced the Q dramatic=
ally and the RX and TX performance were very poor. In configurations where t=
he RX performance was good and the Q high, there was little on no aerial cur=
rent on transmit. The only configuration that gave some antenna current was=20=
nearly useless on receive. Connecting a radial to a metal fence detuned thin=
gs so much that I go nowhere like that.<br>

<br>
Heard GW0HXO&#39;s beacon at reasonable strength and GW3UEP&#39;s beacon - j=
ust. Called CQ quite a few times. No takers.<br>
<br>
Band was still noisy even on relatively remote hilltop with horrible &quot;l=
ine-timebase&quot; type burble drifting across band.<br>
<br>
Clearly more work required to get a viable system. Tips?<br>
<br>
73<br>
<br>
Richard<br>
G3CWI<br>
<br>
<br>
</blockquote></div><br><br clear=3D"all"><br>-- <br>G3YXM IO92BK Birmingham=20=
UK<br>

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