reduced

21 links - and 1 categories

A Reduced Half- sloper for 160 meters - A half sloper antenna for 160 meter band Italian translation of a WD8DSB article appeared in a QST issue during 1998.
[ Hits: 6373 | Votes: 4 | Rating: 8.75 ]

17 Meter Coaxial Moxon Antenna - 17 m reduced size coaxial moxon rectangle, an exercise with an MFJ 259B plans by N0KHQ
[ Hits: 13048 | Votes: 18 | Rating: 5.66 ]

80 meters wire antenna ^pop - A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP
[ Hits: 45430 | Votes: 23 | Rating: 4.43 ]
80m L Antenna. RSBEV's - Reduced Size Broad Elevation Verticals
[ Hits: 4130 | Votes: 5 | Rating: 4.8 ]

Phased Array Antennas - Phased array antennas are composed of multiple individual antenna elements that can have their phase and amplitude controlled to steer the main beam direction in real-time. They are used in radar, communications, and electronic warfare, and offer improved gain and reduced side lobes. A comprehensive document on Phased Arrays include techniques to increase the Antenna Gain and change the Radiation Pattern
[ Hits: 82 | Votes: 0 | Rating: 0 ]

Half Size G5RV - Also known as G5RV junior the half size G5RV feature reduced dimension and multiband coverage
[ Hits: 5324 | Votes: 8 | Rating: 5.75 ]

What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
[ Hits: 74 | Votes: 0 | Rating: 0 ]

The Mini-K9AY Antenna - A reduced size of the popular K9AY receiving loop antenna
[ Hits: 793 | Votes: 3 | Rating: 1.67 ]

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: 182 | Votes: 0 | Rating: 0 ]

I5TGC Antennas - Reduced size longwave antennas by Cesare Tagliabue I5TGC and his experience on 136 kHz band.
[ Hits: 5606 | Votes: 10 | Rating: 8.57 ]
Isotron Antennas - Isotron antennas are antennas of reduced size, without tuning. On 40 and 80m band, it is made of two plates into v whose angles are connected by a coil. In this article the description of a home made realization for the 40m band.
[ Hits: 397 | Votes: 6 | Rating: 8 ]
KGD - Reduced size antenna - A reduced size antenna made of two series resonant circuits with a radiant tube condenser in German
[ Hits: 1034 | Votes: 4 | Rating: 9.5 ]

G8JNJ Broadband HF Vertical Antenna - G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance
[ Hits: 4680 | Votes: 4 | Rating: 7 ]

IC706 MKIIg Cooling Fans Mod - With this simple modification,it will be possible to keep the internal cooling fan on,running at reduced speed,when in receive mode.
[ Hits: 133 | Votes: 0 | Rating: 0 ]

Challenger DX Antenna Review by NK7Z - A review of the GAP Challenger DX Antenna that is not a traditional 1/4 wave vertical, but is a vertical dipole, this gives it several advantages over a standard 1/4 wave vertical, mainly the reduced number of radials, with excellent performances.
[ Hits: 221 | Votes: 2 | Rating: 10 ]

100 Watt RF Power Amplifier for 2 GHz - Modification to an old cellular phone base station modules, with a fairly reduced output power (10 watts or so), the stock power amplifier modules will cover the 2.3 GHz and 2.4 GHz amateur radio bands.
[ Hits: 162 | Votes: 0 | Rating: 0 ]

Homebrew 1 Watt 2.4 GHz Power Amplifier - This will show you how to add a RF power amplifier to your Proxim Symphony for under $50. The cost is reduced by using the existing components on the Symphony, such as the PIN diode switch, and just inserting a higher power final amplifier. Increase the RF output power of your wireless network card to 1 Watt.
[ Hits: 159 | Votes: 4 | Rating: 6.5 ]

Ham Radio TVI in the 21st Century - Ham radio transmissions can interfere with television reception. This is called television interference, or ham radio TVI. Consumer adoption of cable television has significantly reduced ham radio TVI. But the introduction of IPTV, or television over phone systems, has brought ham radio TVI back, often with a vengeance. Here's why
[ Hits: 322 | Votes: 0 | Rating: 0 ]

Common-mode chokes Measurements - Common-mode chokes are useful solutions for RFI reduction. Winding a few turns of coaxial cable on the FT 240-31 toroid can reduced the noise below the received noise floor. In this article author measure different chokes
[ Hits: 156 | Votes: 1 | Rating: 8 ]

Antuino - Antenna Test Equipment - Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).
[ Hits: 305 | Votes: 0 | Rating: 0 ]