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Antennas : 20M : 20 meter Vertical Antennas- 4m Tall Vertical Dipole for 20m
- Constructed in May 2008, this innovative 4m tall electrically full-size halfwave vertical dipole, tunable to multiple bands, offers HF coverage despite its space-saving design. Inspired by cost-effective DIY alternatives, the antenna design departs from conventional center-fed approaches, utilizing asymmetrical dimensions. Despite resonance challenges, the antenna's performance remains viable, boasting broad bandwidth and adaptability, as demonstrated through SWR measurements and EZNEC predictions.
[ Hits: 65 | Votes: 0 | Rating: 0 ]
- Make your own 40/80 Dipole
- Make your own dipole for 40 and 80 meters band, assembling standard product parts like 40 meter traps, the 1:1 balun and insulators
[ Hits: 123 | Votes: 0 | Rating: 0 ]
- Build the K1FM-Loop
- The latest version of the K1FM-Loop is electrically similar to the previous one, but it is designed around off-the-shelf parts or, more generically, items you can readily order online. This antenna relies heavily on 3D printing.
[ Hits: 100 | Votes: 0 | Rating: 0 ]
- HF Receive Antenna
- This page describes a couple of parts box medicine bottle antennas that you can build. The ground side of the capacitor is soldered to the ground of the BNC connector. The positive side of the capacitor takes 5 turns around the toroid and is soldered back to itself. The center pin of the BNC connector takes 5 turns around the toroid and then continues on to the wire wound inductor. From there the antenna continues with an attached piece of wire.
[ Hits: 189 | Votes: 2 | Rating: 3 ]
- Low-Viz Rain Gutter Antenna Mount
- A concept to use common, low-cost parts to mount a VHF/UHF dual-band antenna to help people who have HOA restrictions, are renters, or desire low-visibility characteristics get on the air.
[ Hits: 134 | Votes: 1 | Rating: 10 ]
- CubeSatKit.com
- This website provides kits, parts, and resources for building and launching CubeSats for amateur radio use.
[ Hits: 31 | Votes: 0 | Rating: 0 ]
- Arduino Nano and si5351 Digital VFO/BFO
- A kit Digital VFO with pre-soldered surface mount parts and burned-in firmware, a scratch build with Arduino Nano, C code with modifications, and a Silicon Labs si5351 PLL clock generator on a breakout board.
[ Hits: 369 | Votes: 2 | Rating: 6 ]
- Adapting Standard Headset Mic for Yaesu FT-8900
- Explore the process of creating a custom adapter for the Yaesu FT-8900 radio with a non-standard mic port. The article guides users through understanding the reversed pin-out of the RJ-12 connector on the 8900, providing a detailed circuit for adapting the voltage for electret-based mics. With a list of required parts and construction tips, this DIY project ensures seamless compatibility with standard electric headset mics.
[ Hits: 27 | Votes: 1 | Rating: 1 ]
- Morse key and buzzer project for Scouts
- This morse key and buzzer design only requires parts that one may already have or are easy to find on the web. There is nothing critical except that the contacts must meet when the key is depressed.
[ Hits: 148 | Votes: 1 | Rating: 9 ]
- VHF UHF Low noise Amplifiers
- 2m 70cm 23cm Low noise Amplifiers, 3 Low noise amplifiers Outdoor unit with DB6NT parts
completed.
[ Hits: 128 | Votes: 2 | Rating: 5 ]
- Fldigi on the Cheap
- An FLdigi computer interface from spare parts made with a mic modification
[ Hits: 151 | Votes: 0 | Rating: 0 ]
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