Many hams find that their HF mobiles receive more noise than they do usable signals. Common noise sources include the ignition system and alternator. Spark plug noise is propagated through ungrounded body panels and the exhaust system, which is normally suspended from rubber vibration dampers. The rubberized supports insulate the exhaust from ground, essentially creating…
DetailsThe AxiDraw is a simple, modern, precise, and versatile pen plotter, capable of writing or drawing on almost any flat surface. It can write with your favorite fountain pens, permanent markers, and other writing implements to handle an endless variety of applications. Its unique design features a writing head that extends beyond the machine, making…
DetailsAmong its many tricks, the Raspberry Pi is capable of putting clock signals signal out on its GPIO pins, and that turns out to be just the thing for synthesizing RF signals in the amateur radio bands. What [Zoltan] realized, though, is that the resulting signals are pretty dirty, so he came up with a…
DetailsIntuitive remote control switching contains of two devices – controller and relay box – communicate via ethernet. Suitably for realtime remote devices control, such as receiving antennas, power on/off for any devices, PTT, … Photo by remoteqth.com Photo by remoteqth.com Photo by remoteqth.com Photo by remoteqth.com Photo by remoteqth.com Photo by remoteqth.com Photo by remoteqth.com…
DetailsThe almost ridiculous extents which government agencies go through to get otherwise private data is sometimes being matched by equally almost ridiculous extents to protect it. Since Tor and VPNs no longer seem to be enough to protect user privacy, for good or for ill, some have taken seemingly drastic countermeasures. Like this Proxyham for…
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