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Date: Fri, 30 Jan 2009 22:19:38 +0000
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From: Andy Talbot <andy.g4jnt@googlemail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: LF: QRP WSPR
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I've been somewhat erratically lowering Tx power level during the evening,
and have now reached 0dBm ERP (ish).  The power setting within the Tx
message has been adjusted at each change, apart from three transmissions at
14dBm when it was still reporting 17dBm as the WSPR software wouldn't accept
a setting that wasn't already in its table.

The figures won't go below 0dBm  so they will no longer be a true
representation of tx power.   WSPRnet is still reporting several listeners
copying my sigs, now at -28dB S/N,  so will continue decreasing power a bit
longer.

The current 0dBm ERP is generated from 250mW being delivered to the
antenna.   I've just constructed a 100mW PA, so tomorrow will try that that
for some real QRP instead of the 200 Watt job backed off.


Andy  G4JNT
www.g4jnt.com

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<div>I&#39;ve been somewhat erratically lowering Tx power level during the e=
vening, and have now reached 0dBm ERP (ish).&nbsp; The power setting within=20=
the Tx message has been adjusted at each change, apart from three transmissi=
ons at 14dBm when it was still reporting 17dBm as the WSPR software wouldn&#=
39;t accept a setting that wasn&#39;t already in its table.</div>

<div>&nbsp;</div>
<div>The figures won&#39;t&nbsp;go&nbsp;below 0dBm &nbsp;so they will no lon=
ger be a true representation of tx power.&nbsp;&nbsp; WSPRnet is still repor=
ting several listeners copying my sigs, now at -28dB S/N,&nbsp; so will cont=
inue decreasing power a bit longer.&nbsp; </div>

<div>&nbsp;</div>
<div>The current 0dBm ERP is generated&nbsp;from 250mW being delivered to th=
e antenna.&nbsp;&nbsp; I&#39;ve just constructed a 100mW PA, so tomorrow wil=
l&nbsp;try that&nbsp;that for some real QRP instead of the 200 Watt job back=
ed off.</div>
<div>&nbsp;</div>
<div><br clear=3D"all">Andy &nbsp;G4JNT<br><a href=3D"http://www.g4jnt.com">=
www.g4jnt.com</a><br><br><br></div>

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