To: | [email protected], Chris Osborn <[email protected]>, G6ALB <[email protected]>, James Cowburn <[email protected]>, Chris Dillon <[email protected]>, James Moritz <[email protected]>, [email protected] |
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Subject: | LF: 137.5kHz WSPR Tuesday evening - reports appreciated |
From: | Roger Lapthorn <[email protected]> |
Date: | Tue, 7 Sep 2010 17:34:39 +0100 |
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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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