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Date: Tue, 7 Sep 2010 17:34:39 +0100
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From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org, Chris Osborn <g3xiz@yahoo.co.uk>, 
	G6ALB <andrew@tetrode.co.uk>, James Cowburn <james.cowburn@virgin.net>, 
	Chris Dillon <c.r.dillon@dsl.pipex.com>, James Moritz <james.moritz@btopenworld.com>, 
	mike.dennison@ntlworld.com
DomainKey-Status: good (testing) 
Subject: LF: 137.5kHz WSPR Tuesday evening - reports appreciated
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My 137.5kHz WSPR TX transverter is now working fine, so I'll be *on-air with
WSPR tonight (Sept 7th) from 5.30pm - 11pm UK time*.

After my success on QRSS3 with G3XIZ I'm hopeful he'll now decode my WSPR
signal tonight, assuming Chris can take a listen. If anyone else within,
say, 100km of Burwell, Cambs JO02dg cares to take a look for the WSPR beacon
(running around 35% TX time) I'd be *most* grateful.

Not sure if anyone else has had this problem, but I *was* using the small
16mm 3C90 cores (cream colour) as the PA bifilar output transformer and I
had all sorts of issues with the darn thing overheating and even one
cracking. I replaced this with a choke wound on a T106-2 core and made the
output network work in class D/E and now everything is working very
predictably. The larger diameter 3C90 cores seem fine in the step-down
transformer matching the "in the air" loop.

The WSPR beacon is now going ON.....

73s
Roger G3XBM


-- 
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM   GQRP 1678    ISWL G11088

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My 137.5kHz WSPR TX transverter is now working fine, so I&#39;ll be <u><b>=
on-air with WSPR tonight (Sept 7th) from 5.30pm - 11pm UK time</b></u>. <b=
r><br>After my success on QRSS3 with G3XIZ I&#39;m hopeful he&#39;ll now=
 decode my WSPR signal tonight, assuming Chris can take a listen. If anyon=
e else within, say, 100km of Burwell, Cambs JO02dg cares to take a look fo=
r the WSPR beacon (running around 35% TX time) I&#39;d be <i>most</i> grat=
eful. <br>
<br>Not sure if anyone else has had this problem, but I <i>was</i> using=
 the small 16mm 3C90 cores (cream colour) as the PA bifilar output transfo=
rmer and I had all sorts of issues with the darn thing overheating and eve=
n one cracking. I replaced this with a choke wound on a T106-2 core and ma=
de the output network work in class D/E and now everything is working very=
 predictably. The larger diameter 3C90 cores seem fine in the step-down tr=
ansformer matching the &quot;in the air&quot; loop.<br>
<br>The WSPR beacon is now going ON.....<br><br>73s<br>Roger G3XBM<br><br=
 clear=3D"all"><br>-- <br><a href=3D"http://g3xbm-qrp.blogspot.com/" targe=
t=3D"_blank">http://g3xbm-qrp.blogspot.com/</a><br><a href=3D"http://www.g=
3xbm.co.uk" target=3D"_blank">http://www.g3xbm.co.uk</a><br>
<a href=3D"http://www.youtube.com/user/g3xbm" target=3D"_blank">http://www=
.youtube.com/user/g3xbm</a><br>G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088<=
br>

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