WSPR Transmitter Construction

By AK3Y

This document details the construction, programming, and operation of a modular WSPR transmitter. The transmitter utilizes an ESP8266 NodeMCU, an SI5351 synthesizer with a TCXO for stability, and selectable low pass filters. Construction involves soldering headers, components, and assembling filter module. The ESP8266 is programmed via the Arduino IDE, requiring library installations and code modifications, including network credentials, callsign, and frequency . The transmitter is powered by USB or Vin terminals and its frequency is selected by jumpers and software settings. The document also covers FCC restrictions and how to use the WSPR network

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Technical Reference/Beacon keyers

The title of the main category is Beacon keyers and it deals mainly with Beacon Keyers. The link to this resource has been on our site since Thursday Feb 6 2025, and it has been followed 56 times. So far no one has rated it yet. Be the first to rate it!
Last updated: 2025-02-06

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