Message-ID: <006801cd2aef$63e0a730$0401a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <004e01cd2ae3$9a7eb3b0$0401a8c0@xphd97xgq27nyf> <4FA56D4F.4040304@xs4all.nl>
Date: Sat, 5 May 2012 18:45:20 -0000
MIME-Version: 1.0
Subject: Re: LF: Flex 3000 sdr radio
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Hi Albert
Although I can hear some genuine signals on MF it is really bad with a =
large antenna. LF likewise is also vy poor.
More add on gadgets to make to overcome this problem and then I wonder =
what it will sound like=20
73 de mal/g3kev

  ----- Original Message -----=20
  From: Albert=20
  To: rsgb_lf_group@blacksheep.org=20
  Sent: Saturday, May 05, 2012 6:11 PM
  Subject: Re: LF: Flex 3000 sdr radio


  Op 5-5-2012 19:22, mal hamilton schreef:=20
    MF/LF
    First observations indicate that the radio is a good performer on HF =
with appropriate antennas but on MF/LF with large antenna arrays there =
is cross modulation and overload. This could be overcome with a stepped =
ext attenuator or using smaller antennas on receive.
    Some other radios that I havd tried are useless on LF/MF with small =
antennas but very good with large antenna arrays.
    73 de mal/g3kev


  Mal,

  FlexRadio info, valid for Flex 5K and 3 K (Flex 1k5 below 500 kHz) =20

  Note 7: Customer provided pre-selector or appropriate low pass =
filter(s) required to eliminate images when used below 1.8 MHz

  For a good performance of your SDR you need a band pass filter for 136 =
kHz and 500 kHz, an attenuator is not enough to get rid of all the ghost =
signals that show up on and around these bands.

  Albert



       =20


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<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR></HEAD>
<BODY text=3D#000000 bgColor=3D#ffffff>
<DIV><FONT face=3DArial>Hi Albert</FONT></DIV>
<DIV><FONT face=3DArial>Although I can hear some genuine signals on MF =
it is=20
really bad with a large antenna. LF likewise is also vy =
poor.</FONT></DIV>
<DIV><FONT face=3DArial>More add on gadgets to make to overcome this =
problem and=20
then I wonder what it will sound like </FONT></DIV>
<DIV><FONT face=3DArial>73 de mal/g3kev</FONT></DIV>
<DIV>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dwestberg@xs4all.nl =
href=3D"mailto:westberg@xs4all.nl">Albert</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Drsgb_lf_group@blacksheep.org=20
  =
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, May 05, 2012 =
6:11=20
PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: LF: Flex 3000 sdr=20
radio</DIV>
  <DIV><BR></DIV>Op 5-5-2012 19:22, mal hamilton schreef:=20
  <BLOCKQUOTE cite=3Dmid:004e01cd2ae3$9a7eb3b0$0401a8c0@xphd97xgq27nyf=20
type=3D"cite">
    <META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
    <STYLE></STYLE>

    <DIV><FONT face=3DArial>MF/LF</FONT></DIV>
    <DIV><FONT face=3DArial>First observations indicate that the radio =
is a good=20
    performer on HF with appropriate antennas but on MF/LF with large =
antenna=20
    arrays there is cross modulation and overload. This could be =
overcome with a=20
    stepped ext attenuator or using smaller antennas on =
receive.</FONT></DIV>
    <DIV><FONT face=3DArial>Some other radios that I havd tried are =
useless on=20
    LF/MF with small antennas but very good with large antenna=20
    arrays.</FONT></DIV>
    <DIV><FONT face=3DArial>73 de mal/g3kev</FONT></DIV>
    <DIV>&nbsp;</DIV>
    <DIV>&nbsp;</DIV></BLOCKQUOTE>Mal,<BR><BR>FlexRadio info, valid for =
Flex 5K=20
  and 3 K (Flex 1k5 below 500 kHz)&nbsp; <BR><BR><B>Note 7: Customer =
provided=20
  pre-selector or appropriate low pass filter(s) required to eliminate =
images=20
  when used below 1.8 MHz</B><BR><BR>For a good performance of your SDR =
you need=20
  a band pass filter for 136 kHz and 500 kHz, an attenuator is not =
enough to get=20
  rid of all the ghost signals that show up on and around these=20
  bands.<BR><BR>Albert<BR><BR><BR><BR>&nbsp; &nbsp; &nbsp;=20
<BR></BLOCKQUOTE></BODY></HTML>

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