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Date: Tue, 18 Feb 2014 13:15:14 +0000
From: g3zjo <g3zjo@psk31.plus.com>
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References: <PAEFLMFGBDKKCONLMLBIEEDGEFAA.ganymede444@btinternet.com> <PAEFLMFGBDKKCONLMLBIKEDGEFAA.ganymede444@btopenworld.com> <CAHAQVWN=i1Y=8gbrKSfX=ZWfqsoUpuEMn1H3_eojhv5rCqfNeQ@mail.gmail.com>
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Subject: Re: LF: WSPR Reports - G3XBM, G3ZJO, G4KPX...
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Dave
That will be an interesting test. I have a couple of similar loops and 
they just do not work here due to induced noise from the mains, I have 
tried ground level and bottom of the garden test to no avail. As I get 
away from one source of noise I start to approach another.
I also have a small 'window sill' loop which I took mobile / portable 
and it performs really well, away from home.

Roger
I will put an RX on and run the Grabber to check if I see you. May I 
suggest that you TX at other than the 6 an 8 minute slots. I TX at 06 
etc. and also ruin a little of 08 etc. slots.

73 Eddie


On 18/02/2014 12:51, Roger Lapthorn wrote:
> Thanks Dave,
>
> Your reports have been very useful to me. Going to try an 
> auto-transformer to see if I can match the earth-electrode "loop" any 
> better later. Added a series inductor yesterday (about 200uH?) which 
> increased antenna current about 20%
>
> 73s
> Roger G3XBM
>
>
> On 18 February 2014 12:23, Dave G3WCB. <ganymede444@btopenworld.com 
> <mailto:ganymede444@btopenworld.com>> wrote:
>
>
>
>     Chaps,
>
>     I'm aware that you've been using my WSPR reports to gauge the
>     effectiveness
>     of your various QRP WSPR transmissions. I'm using a 80cm square
>     tuned loop
>     at ground level with a fet pre-amp, feeding my trusty ICOM
>     IC-PCR1000. I've
>     tried to keep the RX set up unchanged, but the loop is inclined to
>     "weathercock" around a bit, especially with the storms recently.
>
>     Also, my WSPR RX doesn't run 24x7, as I use the PC for other duties.
>
>     I went out this morning, and found that the loop is aligned along
>     an axis
>     running 60 - 240 deg, which means that stations in the IO92
>     direction are
>     pretty much in the null direction. As an experiment, from 1214 UTC
>     today I
>     have aligned the loop antenna in a 165 - 345 deg direction. To
>     remove any
>     interaction with the main station "Tee" antenna, which is in the same
>     general area, I have disconnected this and moved my WSPR TX on to
>     the short
>     vertical antenna, which is 30m away from the loop.
>
>     I'll swap the loop back to it's 60 - 240 deg orientation later on
>     - I'll
>     announce when I've done this.
>
>     73, Dave G3WCB IO91RM
>
>
>
>
>
> -- 
> http://g3xbm-qrp.blogspot.com/
> http://www.g3xbm.co.uk
> https://sites.google.com/site/sub9khz/
> http://qss2.blogspot.com/
> http://www.youtube.com/user/g3xbm <http://www..youtube.com/user/G3XBM>
>
>
>
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    Dave<br>
    That will be an interesting test. I have a couple of similar loops
    and they just do not work here due to induced noise from the mains,
    I have tried ground level and bottom of the garden test to no avail.
    As I get away from one source of noise I start to approach another.<br>
    I also have a small 'window sill' loop which I took mobile /
    portable and it performs really well, away from home.<br>
    <br>
    Roger<br>
    I will put an RX on and run the Grabber to check if I see you. May I
    suggest that you TX at other than the 6 an 8 minute slots. I TX at
    06 etc. and also ruin a little of 08 etc. slots. <br>
    <br>
    73 Eddie<br>
    <br>
    <br>
    On 18/02/2014 12:51, Roger Lapthorn wrote:
    <blockquote
cite="mid:CAHAQVWN=i1Y=8gbrKSfX=ZWfqsoUpuEMn1H3_eojhv5rCqfNeQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div>Thanks Dave, <br>
          <br>
          Your reports have been very useful to me. Going to try an
          auto-transformer to see if I can match the earth-electrode
          "loop" any better later. Added a series inductor yesterday
          (about 200uH?) which increased antenna current about 20%<br>
          <br>
        </div>
        73s<br>
        Roger G3XBM<br>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On 18 February 2014 12:23, Dave G3WCB.
          <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:ganymede444@btopenworld.com" target="_blank">ganymede444@btopenworld.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
            <br>
            Chaps,<br>
            <br>
            I'm aware that you've been using my WSPR reports to gauge
            the effectiveness<br>
            of your various QRP WSPR transmissions. I'm using a 80cm
            square tuned loop<br>
            at ground level with a fet pre-amp, feeding my trusty ICOM
            IC-PCR1000. I've<br>
            tried to keep the RX set up unchanged, but the loop is
            inclined to<br>
            "weathercock" around a bit, especially with the storms
            recently.<br>
            <br>
            Also, my WSPR RX doesn't run 24x7, as I use the PC for other
            duties.<br>
            <br>
            I went out this morning, and found that the loop is aligned
            along an axis<br>
            running 60 - 240 deg, which means that stations in the IO92
            direction are<br>
            pretty much in the null direction. As an experiment, from
            1214 UTC today I<br>
            have aligned the loop antenna in a 165 - 345 deg direction.
            To remove any<br>
            interaction with the main station "Tee" antenna, which is in
            the same<br>
            general area, I have disconnected this and moved my WSPR TX
            on to the short<br>
            vertical antenna, which is 30m away from the loop.<br>
            <br>
            I'll swap the loop back to it's 60 - 240 deg orientation
            later on - I'll<br>
            announce when I've done this.<br>
            <br>
            73, Dave G3WCB IO91RM<br>
            <br>
            <br>
          </blockquote>
        </div>
        <br>
        <br clear="all">
        <br>
        -- <br>
        <div dir="ltr"><a moz-do-not-send="true"
            href="http://g3xbm-qrp.blogspot.com/" target="_blank">http://g3xbm-qrp.blogspot.com/</a><br>
          <a moz-do-not-send="true" href="http://www.g3xbm.co.uk"
            target="_blank">http://www.g3xbm.co.uk</a><br>
          <a moz-do-not-send="true"
            href="https://sites.google.com/site/sub9khz/"
            target="_blank">https://sites.google.com/site/sub9khz/</a><br>
          <a moz-do-not-send="true" href="http://qss2.blogspot.com/"
            target="_blank">http://qss2.blogspot.com/</a><br>
          <a moz-do-not-send="true"
            href="http://www..youtube.com/user/G3XBM" target="_blank">http://www.youtube.com/user/g3xbm</a><br>
          <br>
        </div>
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