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References: <4D594B3A.17889.154E048@mike.dennison.ntlworld.com>, <4D595528.6473.17BA97B@mike.dennison.ntlworld.com>, <202981.9384.qm@web28107.mail.ukl.yahoo.com> <4D595ECC.24270.1A14EEE@mike.dennison.ntlworld.com>
Date: Mon, 14 Feb 2011 17:16:25 +0000 (GMT)
From: M0FMT <m0fmt@yahoo.co.uk>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <4D595ECC.24270.1A14EEE@mike.dennison.ntlworld.com>
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Subject: Re: LF: G4AYT?
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Hi LF=20

Ok Mike thanks for all the info again.

But how do you wire up back to back diodes left-handed??=A0.....=A0{:0)
=A073 es GL petefmt=20




________________________________
From: Mike Dennison <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Sent: Mon, 14 February, 2011 16:56:44
Subject: Re: LF: G4AYT?

> I am using a TS690s Internal preamp on. No external amp. Best results
> were with the TX tuner=A0600mm diam resonant transformer from a LW
> antenna=A0up13m 35m long sloping down to about 5m (slope temporary). Up
> wire touches only at tuner OP and two through the wall thin PTFE
> washers and at the top of antenna up lead using a deep ribbed glass
> insulator 8inches long far end plastic dogbone. All comments welcome.

You may need an external pre-amp. See several books and web sites for
circuits. Your insulation should not be a problem on receive.

I forgot to mention that I get some advantage from driving Argo very
hard - well into the red zone - and via a crude limiter (back-to-back
diodes). The AF distortion introduced is counter-intuitive but it has
been found by me and others (Jim, M0BMU calls his limiter a Hendrix-
izer) to gain a dB or two in SNR with only a small increase in
background noise.

Mike, G3XDV
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D


     =20

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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></h=
ead><body><div style=3D"font-family:bookman old style, new york, times, se=
rif;font-size:12pt"><DIV></DIV>
<DIV>Hi LF </DIV>
<DIV>&nbsp;</DIV>
<DIV>Ok Mike thanks for all the info again.</DIV>
<DIV>&nbsp;</DIV>
<DIV>But how do you wire up back to back diodes left-handed??&nbsp;.....&n=
bsp;{:0)<BR>&nbsp;</DIV>73 es GL petefmt=20
<DIV><BR></DIV>
<DIV style=3D"FONT-FAMILY: bookman old style, new york, times, serif; FONT=
-SIZE: 12pt"><BR>
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 13px">=
<FONT size=3D2 face=3DTahoma>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Mike Dennison &lt;mi=
ke.dennison@ntlworld.com&gt;<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</=
SPAN></B> rsgb_lf_group@blacksheep.org<BR><B><SPAN style=3D"FONT-WEIGHT:=
 bold">Sent:</SPAN></B> Mon, 14 February, 2011 16:56:44<BR><B><SPAN style=
=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> Re: LF: G4AYT?<BR></FONT><BR>&g=
t; I am using a TS690s Internal preamp on. No external amp. Best results<B=
R>&gt; were with the TX tuner&nbsp;600mm diam resonant transformer from a=
 LW<BR>&gt; antenna&nbsp;up13m 35m long sloping down to about 5m (slope te=
mporary). Up<BR>&gt; wire touches only at tuner OP and two through the wal=
l thin PTFE<BR>&gt; washers and at the top of antenna up lead using a deep=
 ribbed glass<BR>&gt; insulator 8inches long far end plastic dogbone. All=
 comments welcome.<BR><BR>You may need an external pre-amp. See several bo=
oks and web sites for<BR>circuits. Your insulation should not be a problem=
 on
 receive.<BR><BR>I forgot to mention that I get some advantage from drivin=
g Argo very<BR>hard - well into the red zone - and via a crude limiter (ba=
ck-to-back<BR>diodes). The AF distortion introduced is counter-intuitive=
 but it has<BR>been found by me and others (Jim, M0BMU calls his limiter=
 a Hendrix-<BR>izer) to gain a dB or two in SNR with only a small increase=
 in<BR>background noise.<BR><BR>Mike, G3XDV<BR>=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D<BR><BR></DIV></DIV></div><br>


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