hi q construction detail
11 links
- 2m VHF antennas with high gain
- 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth.
These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.
[ Hits: 8261 | Votes: 12 | Rating: 7.75 ]
- The 2-Element-HB9CV-Beam
updated
- The HB9CV-Beam is a 2-Element-Yagi with two driven elements and was introduced by Rudolf Baumgartner, HB9CV in the 1950ies. This beam antenna is a coax-feeded version of the ZL-Special
construction by DK7ZB for 2m, 6m and 10m
[ Hits: 19703 | Votes: 407 | Rating: 7.56 ]
- 6 meter quarter wave antenna
- 6 Meter 1/4 Wave Antenna by Mike Fedler N6TWW. A detailed article with pictures of construction details of this 50 Mhz antenna
[ Hits: 1001 | Votes: 1 | Rating: 1 ]
- QRO No-Tuner Multiband Dipole
- Construction details of a multiband dipole that can can operate at high power levels, and match its 50-ohm coax feedline without a tuner
[ Hits: 1502 | Votes: 2 | Rating: 4.5 ]
- 160-80-40 Metre Trapped V-Dipole
- A Trapped dipole inverted V antenna for lower HF Bands. Construction details are for temporary installation. Permanent installations will require additional ruggedising and waterproofing however the basic electronics concepts remain the same. This project includes SWR plots for the three bands and pictures details of the homemade traps.
[ Hits: 108 | Votes: 0 | Rating: 0 ]
- J-Pole Construction Drawings
- Complete plan for making a 2-meter J-Pole antenna.
This drawing in PDF File includes a detailed list of the parts needed to assemble the Jpole antenna for 144 MHz.
[ Hits: 256 | Votes: 3 | Rating: 4 ]
- Build a twin-lead Lindenblad Antenna for 70cm and 2m
- This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands
[ Hits: 1268 | Votes: 3 | Rating: 8.67 ]
- Magnetic Loop Antenna Builds and Autotuning Advancements
- Explore two magnetic loop antenna constructions, utilizing a 6-foot and a 12-foot square loop. Accompanied by a detailed description, the 6-foot loop features a built-in stepper motor control circuit, while the 12-foot loop incorporates a separate loop controller. Efficiency, tuning ranges, and the innovative autotuning solution using a microcontroller are discussed, offering insights into overcoming the antenna's narrowband limitations.
[ Hits: 66 | Votes: 0 | Rating: 0 ]
- DK7ZB 144 mhz Yagis
- High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
[ Hits: 1908 | Votes: 7 | Rating: 6.86 ]
- Biquad Antenna Construction
- This page details the construction of a biquad antenna. The biquad antenna is easy to build, and provides a reliable 11dBi gain, with a fairly wide beamwidth.
[ Hits: 9317 | Votes: 19 | Rating: 7.57 ]
- 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 ]
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