Message-ID: <4D39E210.302@telus.net>
Date: Fri, 21 Jan 2011 11:44:16 -0800
From: Scott Tilley <sthed475@telus.net>
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Subject: Re: LF: Alpha benchmark
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Hi Mal

I find the Alphas vary in strength throughout the day.  Are you saying 
that at your location they're fairly stable and do not have diurnal 
variation ?

I guess this may be due to the distances involved if you see fairly 
stable signals...

Would be curious to know if you have made a long term observation...

73 Scott
VE7TIL

On 1/21/2011 11:12 AM, mal hamilton wrote:
> vlf
> As a guide for those interested in VLF 9 Khz it would be useful if 
> each station could use the Alpha station on 11905 Khz as a benchmark 
> for quality of reception.
> and let us all know hown efficient their RX system is.
> In my case using an inv L 150 metres total length not resonated the 
> report is minus 60 dB with a sig over noise of 25 dB. This seems an 
> acceptable system for 9 Khz reception.
> I can do better by resonating the antenna,  or using my 136 antenna 
> system re-resonated for 9 Khz
> I get the impression that at some locations receiving is a problem, 
> for various reasons including noise from being in the middle of a 
> Urban environment.
> Can we have some data.
> de mal/g3kev


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    Hi Mal<br>
    <br>
    I find the Alphas vary in strength throughout the day.&nbsp; Are you
    saying that at your location they're fairly stable and do not have
    diurnal variation ?<br>
    <br>
    I guess this may be due to the distances involved if you see fairly
    stable signals...<br>
    <br>
    Would be curious to know if you have made a long term observation...<br>
    <br>
    73 Scott<br>
    VE7TIL<br>
    <br>
    On 1/21/2011 11:12 AM, mal hamilton wrote:
    <blockquote cite="mid:004a01cbb99f$182a38f0$0401a8c0@xphd97xgq27nyf"        type="cite">
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      <div><font size="2" face="Arial">vlf</font></div>
      <div><font size="2" face="Arial">As a guide for those interested
          in VLF 9 Khz it would be useful if each station could use the
          Alpha station on 11905 Khz as a benchmark for quality of
          reception.</font></div>
      <div><font size="2" face="Arial">and let us all know hown
          efficient their RX system is.</font></div>
      <div><font size="2" face="Arial">In my case using an inv L 150
          metres total length not&nbsp;resonated&nbsp;the report is minus 60 dB
          with a sig over noise of 25 dB. This seems an acceptable
          system for 9 Khz reception.</font></div>
      <div><font size="2" face="Arial">I can do better by resonating the
          antenna, &nbsp;or using my 136 antenna system re-resonated
          for&nbsp;9&nbsp;Khz </font></div>
      <div><font size="2" face="Arial">I get the impression that at some
          locations receiving is a problem, for various reasons
          including noise from being in the middle of a Urban
          environment.</font></div>
      <div><font size="2" face="Arial">Can we have some data.</font></div>
      <div><font size="2" face="Arial">de mal/g3kev</font></div>
      <div>&nbsp;</div>
      <div>&nbsp;</div>
    </blockquote>
    <br>
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