j antenna

1382 links - and 21 categories

80M Vertical antenna with capacitance hat - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
[ Hits: 25088 | Votes: 23 | Rating: 7.05 ]

Active HF antenna - An active HF receiving antenna circuit by G7BCJ
[ Hits: 3690 | Votes: 1 | Rating: 7 ]

P J Grimshaw : Antenna books - Netspace of PJ Grimshaw author of books and websites on antennas for ham radio
[ Hits: 1641 | Votes: 1 | Rating: 9 ]

The Beverage Antenna Memorandum - Memorandum on the Beverage Wave Antenna for Reception of Frequencies in the 550 - 1500 Kilocycle Band", FCC Report 9.2.1, by Benjamin Wolf and Adolph Andersen
[ Hits: 1251 | Votes: 0 | Rating: 0 ]
Comparison of Beverage antenna - A ranking of receiving antennas based on noise being evenly distributed in all directions. These rankings are most accurate in the frequency range of AM broadcast, 160 or 80 meter bands
[ Hits: 2855 | Votes: 2 | Rating: 6.5 ]

Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
[ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

Copper J-Pole Antennas - Conejo Valley Amateur Radio Club, article edited by Rory Eikland, KG6HCU and Ken Larson, KJ6RZ, they have had excellent experience building and using J-Pole antennas, and share their experience on planning VHF and UHF Jpole antennas.
[ Hits: 14128 | Votes: 15 | Rating: 7.07 ]

The Lindenblad Antenna: The Ultimate Satellite Omni Directional Aerial - This Antenna project is a bit more complex than other omni antennas for satellite use, but it is much easier and cheaper than a standard tower mounted circular polarized azimuth and elevation rotating beam system.
[ Hits: 442 | Votes: 5 | Rating: 6.8 ]

Magnetic loop by F5SWN - The magnetic loop, thus named by the use of the magnetic component of the electromagnetic field, is a parallel circuit LC. In this article a sample project to home made a custom antenna. The circular form is often met on the commercial models but this antenna can be hexagonal, octagonal or square.
[ Hits: 253 | Votes: 4 | Rating: 5.25 ]

A Magnetic Loop antenna for 7-21 mhz - If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter
[ Hits: 3827 | Votes: 2 | Rating: 5.5 ]

Modified Buddipole for 40 to 10 Meters - This is modified version of buddipole antenna, using vertical wires instead of telescopic ends by ks7j
[ Hits: 6250 | Votes: 7 | Rating: 6.57 ]

KS7J 5-band Cubex Quad - KS7J's Cubex 5-Band Quad, tests, pictures and modification of this five bands quad antenna
[ Hits: 2740 | Votes: 12 | Rating: 4.75 ]

VHF/UHF Yagi Antenna Design ^pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
[ Hits: 147433 | Votes: 1105 | Rating: 6.95 ]

40m Short Antenna ^pop - GM4JMU shortened dipole for 40 meters band
[ Hits: 27705 | Votes: 32 | Rating: 5 ]

45SD105 Vlada - Personal web site of a freebander, info on 11m digital modes, pictures of antenna projects
[ Hits: 730 | Votes: 2 | Rating: 7.5 ]

Digital Smart Antennas DiSA - Digital Smart antenna (DiSA) Automatically Adjusts over a wide band of frequencies.
[ Hits: 926 | Votes: 2 | Rating: 5.5 ]

K0BG's ham radio mobile operator web site - This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, I trust the information presented will increase your enjoyment of our great hobby. With safety as a byword, there are articles on amplifiers, antennas, bonding, impedance matching, installing hardware, mobile equipment, noise and RFI abatement, wiring, and much more. I do my best to keep these articles up to date, and easy to follow.
[ Hits: 4856 | Votes: 10 | Rating: 8.7 ]

GI Joe's radio electronics - Dealer for Cb radios, Cb antenna & accessories Galaxy radio, Cobra cb radio, Ranger, Texas Star, Palomar. Police scanner, radar detector, GPS, GMRS, FRS, Wilson cellular amplifier & antennas. Owners manuals, schematics and links.
[ Hits: 12752 | Votes: 83 | Rating: 7.95 ]

About Lightning Protection - What You Should Know About Lightning Protection by Joseph H. Reisert
[ Hits: 3121 | Votes: 1 | Rating: 8 ]

QRM and noise reduction - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
[ Hits: 5086 | Votes: 6 | Rating: 7 ]