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Date: Sat, 23 Jun 2012 19:07:09 +0100 (BST)
From: Daniele Tincani <danieletincani@yahoo.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
In-Reply-To: <1474092.1340466836144.JavaMail.root@wamui-june.atl.sa.earthlink.net>
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Subject: Re: LF: Ferrite broadband (LF-MF) antenna?
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Hi all,=0A=A0=0Amany thanks to all who have been so kind to give me interes=
ting advices like the ones below from Johan and Chris. Some of these circui=
ts I already knew when I built my single-turn air-cored=A0loop=A0(at that t=
ime I opted for the M0AYF amplifier, because of its simplicity together wit=
h good performance). Now I'm planning to try to build a wideband multi-turn=
 ferrite-cored active antenna, hopefully covering=A0also LF. Do the same=A0=
 amplifiers suit for both kinds of loop (single-turn air-cored and multi-tu=
rn ferrite-cored)?=0A=A0=0A73=0ADaniele IZ5WWB=0A=A0 =0A=0A________________=
________________=0A Da: Chris Trask <christrask@earthlink.net>=0AA: rsgb_lf=
_group@blacksheep.org; rsgb_lf_group@blacksheep.org =0AInviato: Sabato 23 G=
iugno 2012 17:53=0AOggetto: Re: LF: Ferrite broadband (LF-MF) antenna?=0A  =
=0A>=0A> > so what I would appreciate some suggestions about=0A> > is the r=
equired low-impedance amplifier, similar to those used in=0A> > air-core br=
oadband loops, if it does make sense of course. Any ideas?=0A>=0A>=0A> Hi D=
aniele,=0A>=0A>you may get some inspiration from LZ1AQ's loop amplifier des=
ign.=0A> =0A> http://www.lz1aq.signacor.com/docs/wsml/wideband-active-sm-lo=
op-antenna.htm=0A>=0A=0A=A0 =A0  This amplifier provides better performance=
 than either the Wellbrook or Pixel commercial products:=0A=0Ahttp://www.ho=
me.earthlink.net/~christrask/Paper009.html=0A=0A=0AChris Trask=0AN7ZWY / WD=
X3HLB=0ASenior Member IEEE=0Ahttp://www.home.earthlink.net/~christrask/
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:Co=
urier New, courier, monaco, monospace, sans-serif;font-size:10pt"><div><spa=
n>Hi all,</span></div><div><span></span>&nbsp;</div><div><span>many thanks =
to all who have been so kind to give me interesting advices like the ones b=
elow from Johan and Chris. Some of these circuits I already knew when I bui=
lt my single-turn air-cored&nbsp;loop&nbsp;(at that time I opted for the M0=
AYF amplifier, because of its simplicity together with good performance). N=
ow I'm planning to try to build a wideband multi-turn ferrite-cored active =
antenna, hopefully covering&nbsp;also LF. Do the same&nbsp; amplifiers suit=
 for both kinds of loop (single-turn air-cored and multi-turn ferrite-cored=
)?</span></div><div><span></span>&nbsp;</div><div>73</div><div>Daniele IZ5W=
WB<br></div>&nbsp; <div style=3D"font-family: Courier New, courier, monaco,=
 monospace, sans-serif; font-size: 10pt;"> <div style=3D"font-family:
 times new roman, new york, times, serif; font-size: 12pt;"> <div dir=3D"lt=
r"> <font size=3D"2" face=3D"Arial"> <div style=3D"margin: 5px 0px; padding=
: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; f=
ont-size: 0px;" class=3D"hr" contentEditable=3D"false" readonly=3D"true"></=
div>  <b><span style=3D"font-weight: bold;">Da:</span></b> Chris Trask &lt;=
christrask@earthlink.net&gt;<br> <b><span style=3D"font-weight: bold;">A:</=
span></b> rsgb_lf_group@blacksheep.org; rsgb_lf_group@blacksheep.org <br> <=
b><span style=3D"font-weight: bold;">Inviato:</span></b> Sabato 23 Giugno 2=
012 17:53<br> <b><span style=3D"font-weight: bold;">Oggetto:</span></b> Re:=
 LF: Ferrite broadband (LF-MF) antenna?<br> </font> </div> <br>&gt;<br>&gt;=
 &gt; so what I would appreciate some suggestions about<br>&gt; &gt; is the=
 required low-impedance amplifier, similar to those used in<br>&gt; &gt; ai=
r-core broadband loops, if it does make sense of course. Any
 ideas?<br>&gt;<br>&gt;<br>&gt; Hi Daniele,<br>&gt;<br>&gt;you may get some=
 inspiration from LZ1AQ's loop amplifier design.<br>&gt; <br>&gt; <a href=
=3D"http://www.lz1aq.signacor.com/docs/wsml/wideband-active-sm-loop-antenna=
.htm" target=3D"_blank">http://www.lz1aq.signacor.com/docs/wsml/wideband-ac=
tive-sm-loop-antenna.htm</a><br>&gt;<br><br>&nbsp; &nbsp;  This amplifier p=
rovides better performance than either the Wellbrook or Pixel commercial pr=
oducts:<br><br><a href=3D"http://www.home.earthlink.net/~christrask/Paper00=
9.html" target=3D"_blank">http://www.home.earthlink.net/~christrask/Paper00=
9.html</a><br><br><br>Chris Trask<br>N7ZWY / WDX3HLB<br>Senior Member IEEE<=
br><a href=3D"http://www.home.earthlink.net/~christrask/" target=3D"_blank"=
>http://www.home.earthlink.net/~christrask/</a><br><br><br><br> </div> </di=
v>  </div></body></html>
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