References: <510A94C5.2000001@psk31.plus.com>
From: Roger Lapthorn <rogerlapthorn@gmail.com>
In-Reply-To: <510A94C5.2000001@psk31.plus.com>
Message-Id: <DAD5F5F5-A48C-4A22-A883-B44F3B01BF57@gmail.com>
Date: Thu, 31 Jan 2013 21:14:34 +0000
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Mime-Version: 1.0 (1.0)
Subject: Re: LF: QRPpp on 474KHz
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Good work Eddie!

73s
Roger G3XBM=20

On 31 Jan 2013, at 15:59, g3zjo <g3zjo@psk31.plus.com> wrote:

> LF
>=20
> The change from 500KHz to 472KHz rendered a few mini Xtal controlled TX mo=
dules once used on 500 redundant so I have changed them to DDS control.
>=20
> I have run the 200uW TX again which gave me my first spot on 500kHz in 200=
09 :-
>=20
> 2009-11-22 00:48 G3ZJO 0.503814 -30 0 IO92ng +17 0.050 M0BMU IO91vr 76 47
>=20
> Since that first report I have made antenna improvements so assuming no ch=
anges at M0BMU these should be reflected in the report from that rig.
>=20
> 2013-01-28 00:50 G3ZJO 0.475790  -18  0 IO92ng +0  0.001 M0BMU  IO91vr 76 4=
7
>=20
> Last night I ran a different mixer/driver to the same PA still 200uW EIRP w=
ith very much the same results.
>=20
> 2013-01-30 00:30 G3ZJO 0.475612   -21  0 IO92ng +0  0.001 M0BMU  IO91vr 76=
 47=20
>=20
> Today I completed the change of my very first test TX into a buffer, this T=
X could never produce enough signal into my first antenna experiments for a d=
ecode. I measured the power into a 50R load it is 10dB down on the above TX s=
o 20uW EIRP. I tried it as the PA.
>=20
> 2013-01-31 14:46 G3ZJO 0.475601    -30  0 IO92ng  +0  0.001 M0BMU IO91vr 7=
6  47=20
>=20
> After 4 transmissions (only 8 minutes on air) my best DX is 100Km.
>=20
> 2013-01-31 14:56 G3ZJO 0.475602    -29  0 IO92ng +0  0.001  G3SZS  IO81vv 1=
00 62
>=20
> If I was calling CQ on the key I estimate 8000 Years before I got any repo=
rt AT ALL then it would most likely be meaningless 599 :-)=20
>=20
> Unfortunately the power levels shown by the WSPR reports are not correct a=
nd must be disregarded. Tests will continue at 20 micro Watts EIRP for this e=
vening.
>=20
> 73 Eddie
>=20

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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Good work Eddie!</div><div><br></div><div>73s</div><div>Roger G3XBM&nbsp;<br><br>On 31 Jan 2013, at 15:59, g3zjo &lt;<a href="mailto:g3zjo@psk31.plus.com">g3zjo@psk31.plus.com</a>&gt; wrote:<br><br></div><blockquote type="cite"><div>
  

    <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
  
  
    LF<br>
    <br>
    The change from 500KHz to 472KHz rendered a few mini Xtal controlled
    TX modules once used on 500 redundant so I have changed them to DDS
    control.<br>
    <br>
    I have run the 200uW TX again which gave me my first spot on 500kHz
    in 20009 :-<br>
    <br>
    <b>2009-11-22 00:48 G3ZJO 0.503814 -30 0 IO92ng +17 0.050 M0BMU
      IO91vr 76 47</b><br>
    <br>
    Since that first report I have made antenna improvements so assuming
    no changes at M0BMU these should be reflected in the report from
    that rig.<br>
    <br>
    <b>2013-01-28 00:50 G3ZJO 0.475790&nbsp; -18&nbsp; 0 IO92ng +0&nbsp; 0.001 M0BMU&nbsp;
      IO91vr 76 47<br>
      <br>
    </b>Last night I ran a different mixer/driver to the same PA still
    200uW EIRP with very much the same results.<br>
    <br>
    <b>2013-01-30 00:30 G3ZJO 0.475612 &nbsp; -21&nbsp; 0 IO92ng +0&nbsp; 0.001 M0BMU&nbsp;
      IO91vr 76 47</b> <br>
    <br>
    Today I completed the change of my very first test TX into a buffer,
    this TX could never produce enough signal into my first antenna
    experiments for a decode. I measured the power into a 50R load it is
    10dB down on the above TX so 20uW EIRP. I tried it as the PA.<br>
    <br>
    <b>2013-01-31 14:46 G3ZJO 0.475601 &nbsp;&nbsp; -30&nbsp; 0 IO92ng&nbsp; +0&nbsp; 0.001 M0BMU
      IO91vr 76&nbsp; 47 <br>
      <br>
    </b>After 4 transmissions (only 8 minutes on air) my best DX is
    100Km.<br>
    <br>
    <b>2013-01-31 14:56 G3ZJO 0.475602 &nbsp;&nbsp; -29&nbsp; 0 IO92ng +0&nbsp; 0.001&nbsp;
      G3SZS&nbsp; IO81vv 100 62<br>
      <br>
    </b>If I was calling CQ on the key I estimate <b>8000 Years</b>
    before I got any report AT ALL<b> </b>then it would most likely be
    meaningless<b> 599<span class="moz-smiley-s1"><span> :-) </span></span><br>
    </b><br>
    Unfortunately<b> </b>the power levels shown by the WSPR reports are
    not correct and must be disregarded. Tests will continue at 20 micro
    Watts EIRP for this evening.<br>
    <br>
    73 Eddie<br>
    <br>
  

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