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thestone.zone | ||
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tbspace.de
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| | | | | QO-100, also known as Es'hail-2 is a geostationary amateur radio satellite. It can be used by large parts of the world, including Europe, Africa, (parts of) South America and Asia. The satellite works as a linear transponder. It receives a specific range in the 2.4 GHz (13cm) band and sends it back to earth on 10 GHz (3cm). In order to generate such a 2.4 GHz signal and transmit it to the satellite conventional radio technology with transverters could be used. I chose a different route and planned a fully software-defined setup. This has many advantages: - Cost (PlutoSDRs can be bought for ~120?) - Low power consumption (laptop, SDR, amplifiers), ideal for portable usage - No SSB transceiver needed - Software DSP processing for very clean signals - I/Q sampl... | |
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mklimenko.github.io
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| | | | | In this series of articles I'd like to share my experience in GNSS receiver design over the last 10+ years. Writing down the knowledge on various topics is an excellent way to share the information, as well as structuring and preparing this kind of educational material allows one to find the missing pieces in one's knowledge. | |
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acidbourbon.wordpress.com
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| | | | | Video Appetizer https://youtu.be/XsFSDM1pgMA TLDR I built a shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio parts - no coils, no variable capacitors, no exotic diodes. This project is easy to build and gives you a hands-on experience with radio technology... | |
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www.realtime.com.au
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| | | [AI summary] A detailed technical guide documenting the diagnosis, repair, and upgrade of a vintage TRS-80 Model 3 computer, including fixing power supply capacitors, swapping RAM chips, and installing a FreHD drive. | ||
