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Old December 20th 18, 12:56 AM posted to,,,
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Default [VK2TPM] Minimal WSPR transmit with Arduino and Si5351

marxy's musing on technology

Minimal WSPR transmit with Arduino and Si5351

Posted: 18 Dec 2018 11:00 PM PST

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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