JPSKMail v1.5 Released

Introduction How much bandwidth does the mobile ham really need? Like most questions, there are several answers to this. The best one probably being “it depends on your lifestyle”. If you are used to broadband internet access and don’t want to give that up when you are en route, you are a potential candidate for…

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JUMA 500 kHz Transmitter

Overview JUMA TX500 is a digitally controlled CW transmitter for the 500 kHz amateur radio band (600 m). The transmitter is available as a component kit which inludes all the electrical and mechanical componets. JUMA TX500 is using ultra high efficiency CMCD amplifier (Current Mode Class D) topology in the final RF amplifier. The final…

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WSPR Receiver 20M KIT RK-20

Advances in communications in recent years have come at a startling pace. In the old days, tocommunicate via radio one needed a good antenna, a selective receiver, and a powerful transmitter.While those items are still useful, today there is one more item required: good software. The “weaksignal propagation reporter” software or WSPR (pronounced “whisper”) is…

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