antenna for 30 m band
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Antennas : 15M- Build a Lightweight 15m Yagi Antenna: Simple Design for Impressive Performance
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- In this article, Steve G0UIH presents a straightforward guide for constructing a lightweight 15m 3 Element Yagi antenna with impressive performance metrics. With a focus on ease of construction and efficiency, the design boasts a nearly 8.2dbi forward gain and 30db front to back ratio. Utilizing readily available materials and a hairpin match for impedance matching, this Yagi offers broad bandwidth and simple tuning for optimal operation across the 15m band.
[ Hits: 47 | Votes: 0 | Rating: 0 ]
- End Fed Antenna for WARC Bands
- I used a FT 240-43 for much more power, not needed but beter safe than sorry.
150 Watt continious, 300 Watt PEP SSB, 90 Watt Digimodes 10 Mhz, 18 Mhz, 24 Mhz Very easy to build design and a good antenna for people who don't have much space for big towers or long wires This design is from Hans - PE1RNU
[ Hits: 184 | Votes: 1 | Rating: 3 ]
- TEFV Terminated End Fed Vee Antenna
- The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
[ Hits: 183 | Votes: 2 | Rating: 6.5 ]
- 40m QRO End Fed Half Wave Antenna Coupler
- A medium power End Fed Half Wave Antenna coupler, specifically tuned to the QRP frequency of 7030 kHz. Constructed from coil stock and capacitors, it achieves an impedance ratio of 64:1. The coupler has proven effective for power ranges from 2 to 100 Watts on the 40m band.
[ Hits: 102 | Votes: 0 | Rating: 0 ]
- Enhancing Performance with W8JK/MOXON Antenna Variant
- F5NPV introduces a variant of the W8JK antenna design, employing the MOXON principle. With extended monopoles, it outperforms the Open-Folded W8JK, yielding a 1dbd gain improvement, enhanced performance on 30m and 10m bands, bi-directionality, and lower side attenuation. The design's focus on higher radiation impedance results in increased antenna efficiency and reduced losses. Despite these improvements, the bill of materials remains unchanged.
[ Hits: 178 | Votes: 0 | Rating: 0 ]
- Open-Folded W8JK Antenna for HF
- Originally designed by John Kraus, W8JK in about 1940, this antenna has some interesting properties.
The W8JK antenna is 2 (Two) centre-fed double-dipole fed by a pair of anti-phase signals. Small size, simple antenna, offer nice performance but need a tuner. Tested in this project from 30m to 6m bands
[ Hits: 139 | Votes: 1 | Rating: 3 ]
- Active 3-30 MHz Hula-Loop Antenna for Shortwave
- This active antenna for the shortwave band provides surprising performance, even indoors. As the name implies, the main loop is made from a Hula-Hoop with the metallic paint stripped off and a single turn of 14AWG copper wire inserted inside the hoop.
[ Hits: 155 | Votes: 1 | Rating: 10 ]
- Mastering HF Communication: Decoding Space Weather Data
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- The article enlightens radio amateurs on utilizing real-time space weather data to optimize HF communication. Navigating through Hp30 index, MUF, f0F2, and eSFI metrics, it explains their significance in band selection and propagation forecasting. With essential links and practical insights, enthusiasts learn to discern optimal conditions for high-band DX, low-band DX, and NVIS operations. The author's observations and antenna optimization tips enrich understanding for effective HF operations.
[ Hits: 59 | Votes: 0 | Rating: 0 ]
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