lf antenna

303 links - and 1 categories

K2YWE's Compact 160m Lazy-U Antenna - This compact 160m antenna is a half-wave dipole with a vertical section. It requires no radials and has worked well for me.
[ Hits: 17998 | Votes: 16 | Rating: 7.31 ]
Ground System on a 160M vertical - Ground system measurements on a 160 M vertical by Rudy Severns N6LF
[ Hits: 1913 | Votes: 1 | Rating: 10 ]

Attic 30 m dipole antenna - A full size half-wave 30m dipole installed in an attic
[ Hits: 6980 | Votes: 4 | Rating: 7.25 ]

K3KY's Short Beverage ^pop - Originally planned as an 80/160 Beverage, this antenna is a terrific performer on 40 and 30 meters
[ Hits: 25607 | Votes: 8 | Rating: 5.63 ]
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 ]

How to make an end-fed antenna work ^pop - Here is a sure fire way to make end-fed halfwave antennas fed with a 50 ohm coupler work - without long radials, grounds, chokes, voodoo.
[ Hits: 43964 | Votes: 30 | Rating: 6.71 ]

End-Fed Halfwave Antenna - The end-fed halfwave antenna is a resonant half wavelength long antenna like a dipole antenna except for it is fed at its end rather then in the center. This antenna is as old as radio and is probably best known as the Zepp Antenna
[ Hits: 24209 | Votes: 18 | Rating: 7.55 ]

Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.
[ Hits: 4567 | Votes: 2 | Rating: 5 ]

Thinking about Ideal Loops - Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
[ Hits: 2271 | Votes: 6 | Rating: 7.33 ]

Antennas for HF mobile operation ^pop - The following description should give you guidance on how to build a mobile antenna for HF bands yourself, using a very cheap CB-mobile whip antenna base. Antennas for mobile operation 7Mhz ,10Mhz, 14Mhz, 18Mhz, 21Mhz, 24Mhz,28-430Mhz
[ Hits: 90297 | Votes: 80 | Rating: 5.12 ]
A $20 HF mobile antenna - A few hours of fun with PVC and wire and you have got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
[ Hits: 10547 | Votes: 6 | Rating: 7.33 ]

Choosing wire for an antenna ^pop - One of the most asked questions when it comes to antennas is what kind of wire should I use
[ Hits: 32908 | Votes: 36 | Rating: 6.33 ]

Limited space antennas - more limited space antennas
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How create simple dipoles - How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas
[ Hits: 3339 | Votes: 4 | Rating: 6.5 ]

Antenna Noise and Signal Cancelling at LF - The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.
[ Hits: 629 | Votes: 0 | Rating: 0 ]

HF Antennas for restricted space - Arrl document about invisible antennas and indoor systems. It is important to consider that few compromise antennas are capable of delivering the performance one can expect from the full-size variety. But the patient and skillful operator can often do as well as some fellows who are equipped with high power and full-size antennas. The "cliff-dweller" may not be able to "bore a hole" in the band as often, and as easily, but DX can be worked successfully when band conditions are suitable.
[ Hits: 9199 | Votes: 7 | Rating: 5.28 ]

Blue's radio stuff - Site for radio, antenna, and scanner sales. There is also some useful information about mods and mic wiring.
[ Hits: 2999 | Votes: 1 | Rating: 1 ]

AMANDX - AMANDX is a site dedicated to the new listener. There are articles on antennas receivers etc.
[ Hits: 1932 | Votes: 7 | Rating: 8.57 ]

Antenna Noise and Signal Cancelling at LF - By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
[ Hits: 7909 | Votes: 6 | Rating: 4.5 ]
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 ]