Re: Si5351 reception reports
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Mikael, was your friend using the modified U3S firmware from QRP labs? It seems like many balloon builders use this firmware. I tried to obtain it one before, but the author is no longer releasing it and it have never been open source.?
To my experience there is no need for an amplifier, even at the moste remote areas of the world Im getting a lots of spots runnig the 5351 barebone, Im using 20m band and cut the antenna to regular formula with the 95% shortening of the legs, longest spots heard is 19000km, and I have got a couple of +17000km spots whitch says some of the benefits of wspr :)??
A friend of mine that flow on the south hemisphere (mostly water) used a simple bs170 as a an amp to get a few more db:s out, se attached pic of one of his earliest trackers.
/Mikael
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