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Old December 20th 18, 12:56 AM posted to rec.radio.amateur.moderated,aus.radio.amateur.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment
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Default [VK2TPM] Minimal WSPR transmit with Arduino and Si5351


marxy's musing on technology

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Minimal WSPR transmit with Arduino and Si5351

Posted: 18 Dec 2018 11:00 PM PST
http://blog.marxy.org/2018/12/minima...duino-and.html

Intrigued by the ZachTek pocket WSPR transmitter Peter, VK3YE, has
reviewed, I wondered if I could get a simple beacon going using just an
Arduino, an Si5351 clock generator and (you'll be pleased to hear) a low
pass filter.

Here's the rig. The low pass filter is from the VK3YE Beach 40 design which
I like because it uses off the shelf inductors.






The waveform isn't perfect but it's


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