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Antennas : 40M : 40 meter Vertical Antennas- Vertical bazooka antenna for the 40m
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- A quarter wave vertical omni-directional antenna for 7 MHz. Formulas for dimensions in feet and meters are provided. Ideal radial angle is between 35° and 45°. Velocity factor (Vf) varies based on coax type.
[ Hits: 128 | Votes: 7 | Rating: 6.85 ]
- 70MHz Quarter Wave GP Antenna
- A homemade quarter wave ground plane anntenna for 4 meters band.
[ Hits: 105 | Votes: 0 | Rating: 0 ]
- Double BiQuad Antenna Calculator
- Online antenna calculator for homemade double biquad antenna for UMTS 3G 4G WiMAX WiFi frequencies. Article includes also a simple biquad antenna for 4g
[ Hits: 152 | Votes: 2 | Rating: 5.5 ]
- 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 ]
- G4WIF End Fed Half Wave Antenna
- Opting for a visually appealing inverted L configuration, G4WIF anchors the End Fed Half Wave antenna to an old clothes line pole, seeking cost-effectiveness in their endeavor. Despite initial misconceptions about transformer components, a £7.95 investment in a T240-43 toroid and DIY mounting container resolves the issue. Reflecting on commercial alternatives, G4WIF's homemade solution proves both economical and sufficient for their amateur radio needs.
[ Hits: 77 | Votes: 0 | Rating: 0 ]
- Double BiQuad Antenna for 2.6 GHz
- This is basic instructions for homemade 4G Antenna working on 2600 MHz UMTS featuring 13 14 dBi gain.
This antenna is desigend to resonate on microwave frequencies in two segments from 2500 to 2570 MHz for Uplink, and from 2620 to 2690 MHz for Downlink.
[ Hits: 84 | Votes: 0 | Rating: 0 ]
- 20m 30m 40m Bandpass Filters
- Homemade LC Bandpass Filters for 20M, 30M, 40M In multi-station environments like special events, field day, portable operating, is very important to protect receivers from excessively strong signals. Bandpass filters help to protect your transceivers.
[ Hits: 376 | Votes: 1 | Rating: 10 ]
- Computer headset adapted for Ham Radio Usage
- Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram
[ Hits: 178 | Votes: 0 | Rating: 0 ]
- Decoder CW
- A homemade morse code decoder project, providing a detailed schematic and pictures
[ Hits: 198 | Votes: 3 | Rating: 6.33 ]
- Portable 40m CW Transceiver
- Homemade portable transceiver for the 40 meters band.
[ Hits: 65 | Votes: 1 | Rating: 1 ]
- 70MHz transverter
- Homemade 4 meter transverter project
[ Hits: 67 | Votes: 0 | Rating: 0 ]
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