Tag Archives: qrp labs

Solar Powered WSPR Transmitter

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I wanted to see if you could cheaply power and run a WSPR transmitter from a battery and solar panel. The system was connected for 7 days, transmitting¬†around 80% of the time, day and night. The project is detailed online. … Continue reading

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Ultimate Labs construction (Part 2)

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I have added multi band options to the U3S recently. Part 2 of the project deals with the addition of the switched LPF relay board and additional LPF. You can read the story of the construction, thankfully without the addition … Continue reading

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