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PLEASE NOTE: The antenna is the most important equipment of a radio station!

An antenna is an electrical device that converts electrical energy into radio waves, and vice versa. It is generally used with a radio transmitter or radio receiver. In the transmission, a radio transmitter provides an oscillating electrical current in "radio frequency" (i.e. high frequency alternating current (AC) at the terminals of the antenna, and the antenna radiates the current energy of electromagnetic waves (waves radio). In reception, an antenna intercepts some of the energy of an electromagnetic wave in order to produce a small voltage at its terminals, which is applied to a receiver to be amplified. An antenna (radiating system) is just an impedance transformer which couples the output of the transmitter with the impedance of space, known as "ether” which is 377 ohms.

The first antennas were built in 1888 by German physicist Heinrich Hertz in his pioneering experiments to prove the existence of electromagnetic waves predicted by the theory of James
Clerk Maxwell. He published his work in Annalen der Physik und Chemie ( 36 vol . , 1889).

Many hams do not observe carefully the fact that the antenna is the most important equipment of any radio station and, although they have excellent equipment cannot good contacts nor good signal reports, it is the antenna that guarantees total irradiation transmitted signals.

Is always a doubt, even for the more experienced, decide which antenna will operate. We believe that the more simple and efficient is without doubt the Dipole antenna. More dipoles antennas used are the "1/2 wave", i.e. those which have half the length of the track on which we operate. For example, an antenna for the 80 meter band will have approximately 40 meters in total length. An antenna for 40 meters tera 20 meters long. Dipole antennas can also be fitted in the position of an inverted V. The way to calculate the Dipole is extremely simple:

Antenna length = 142,5
f (
KHz)

If we want to build a dipole antenna for 40 meters band, we should define what is the frequency of "middle of the track". If the goal is to operate preferably in telegraphy (CW), the central frequency is 7,025 kHz, that's because the Telegraph range from 7,000 to 7,050 kHz. Just now replacing in formula (f = 7,025) and the result will be: 20.28 (twenty metres and thirty-six centimeters), i.e. 10.14 (ten meters and 14 inches) to each side of the antenna (leave about 10 inches, the more, in each side for easy adjustment.

DIPOLE and INVERTED V = > Calculate your antenna for frequencies below 30 MHz

Enter the desired Frequency: Khz (ex: 7.025 - Use the point)

The total length of the DIPOLE will be meters.  Each side of the dipole is meters.

The total length of the INVERTED "V" will be meters.
Each side of the dipole en "V" inverted will be
meters.

Use common cable diameter 10, 12 or 14 AWG. Use good quality coaxial cable with impedance of 50 Ohm RG 58 type (fine) or RG-213 (thick) to feed the antenna (how many yards are needed to reach the transceiver). The time has come for adjustments that must be made with R.O.E meter (stationary were in), initially in the frequency of our example (7,025 Khz) where we should have the best income (falling gradually when we move away from 7,025 Khz, up or down). The adjustment should be made (if required) by reducing its length on both sides of 1 and 1 cm. Avoid cutting the cord, shorten the antenna and wrap the tips. After each reduction, make new measurement of R.O.E., (with a lot of patience) repeat as many times as you need, until the stationary were in reach at minimum. Need very careful not to turn on the transmitter when the cold stretch antenna being cut! Whenever possible, mount the antenna as high as possible in relation to the soil. Good QSOS and many DX 's.

• With the adjusted antenna you can already check the conditions of propagation and, if desired, access the beacons - list to assess the performance of your antenna!

•

Build a broadband balun (shock type)

See below how simple it is to build a balun using own coaxial cable that feeds the antenna. It must be installed as close to the antenna.

The balun is formed by a coil which is made with the cable itself. Its diameter should be 10 cm for thin as RG58 cable 15 cm and for thick cables and RG213. For use in frequencies from 3.5 to 30 MHz, it only takes 10 turns.

Antenna portable / mobile 6 and 10 meters - Dual Band ( by VK5ZCB )

This antenna was built using the "remnants" of an old vertical antenna 5/8 for the band of 2 meters. During the years 2013 and 2014 could use it getting great results. Simplicity and ease of construction: for example, coil L2 can be wound in a length of PVC 20mm.

See below for all the details for its assembly:

The length of the coaxial cable

The importance of coaxial cable length is based on the concept that the resonant frequency in a transmission line when its length is a half - wave or multiple thereof, will be required to "deliver" the same impedance on both sides of this transmission line.

Among the precautions that you must take with the antennas, the measure of coaxial cables is one of the most important. Coaxial cables of descent of the antennas used by radio amateurs in their equipment, Transceivers must always be cut in frequently, so we guarantee a relationship of Wave Park (ROE) low in the equipment.

Adopt as a general rule the use of multiple of 1/2 wave (non-fractionated). The calculation to find the multiple of 1/2 wave for any frequency is as follows:

Where:   Multiple multiple of 1/2 wave = Result in meters

Speed of light = 300,000 Km/second

Frequency = frequency in Khz

Coaxial cable velocity factor (choose the corresponding factor):

RG-58 e RG-213  =  0,67              RGC-213  =  0,82

Calculation example: Let's say you go to install an antenna to the VHF 2 Meter band (144 to 148 MHz). Let's say that you need 20 feet of cable RGC 213-the radio antenna. The cable chosen was the RGC-213 because it is an excellent, low-loss cable. The speed factor of RF in cable RGC-213 is 0.82.

The frequency that we use is 146,000 Khz

Multiple 1/2 wave = (300,000/(2 x 146,000)) X 0.82

Multiple 1/2 wave = 0.84 meters = (20 ft/0.84) = multiple 23.8

How should not have multiple fractionated round to 23 or 24 multiple ... In our example we chose 24 multiple meaning a coaxial cable with multiple 24 x 0.84 m = 20.16 (twenty meters and sixteen centimeters) in length.

 Multiple of 1/2 Wave for each of the bands of operation Coaxial cable RG-58 e RG-231 Coaxial cable RGC-231 Operating range Multiple (in meters) Operating range Multiple (in meters) 80 meters 27,16 80 meters 33,24 40 meters 14,06 40 meters 17,32 20 meters 7,10 20 meters 8,69 15 meters 4,73 15 meters 5,79 10 meters 3,54 10 meters 4,33 2 meters 0,69 2 meters 0,84

Note: for applications in HF multiband, where we have a variety of frequencies, we can still use a coupler to compensate possible rates of ROE.

STORM-27

EXCELLENT-Vertical Antenna for 10 and 11 metres-500W

Reduced dimensions and large antenna efficiency. The STORM is designed to work in any weather condition. To improve its functioning should be installed at highest point of your home, boat, car or truck.

Specifiche Tecniche:

• Vertical antenna-need ground plan
• Rain resistant
• No need to adjust for ROE.
• Supplied complete with all necessary accessories
• Black color
 Working frequency 27 a 29 MHz Power applicable 500 W Minimum ROE 1 ,1:1 Gain 0.9 dB Size (height) 1000 mm

Beware of Welding!

All inevitably amateur ventures to make use of iron welds and use our known "welding wire" made ​​up of 60 % tin and 40 % lead.

Great care is required in handling the "welding wire", which may cause poisoning due to lead can cause anemia, damage to the central and peripheral nervous system, the glands , kidneys, intestines and the circulatory system.

Vapors and solder fumes can induce asthma or its aggravation. It is noteworthy that this toxic smoke may contain PVC due to the high temperatures of contact with the iron welds.

Smell is the most reliable indicator of the existence of these smoke - who smells at the same time are inhaling the smoke.

And how can we defend ourselves against the risks of welding?

1 ) Every time , after welding and also prior to subsequent meals , we should wash their hands with abundant water;

2 ) Always keep well ventilated places where we make welding;

3 ) Maintain the lowest possible contact with the "wire welds" and the solder paste;

4) Avoid inhalation of vapors and smoke materials, heated wires and components during soldering.

Use the Antenna Tuner Kenwood AT- 250 with any Radio

1) Localize o conector ACC na parte traseira do AT-250;

2 ) Connect pin 3 to ground (watch the pin identification 3 - see drawing above)

3) Connect the AT- 250 to your radio through the INPUT cable;

4 ) Connect the antenna cable to the AT- 250 in ANT-1

5 ) Place the RX switch to OUT;

6 ) Finally connect the AT- 250 to the power outlet;

Steps to tuning :

a) Place the AT- 250 in POWER ON

b) Place the AT- 250 TUNER ON

c) Place the AT- 250 TUNE ON

d) Place the AT- 250 ANTENNA in ANT-1

e) Place the AT- 250 METER in SWR

f) Place the AT- 250 BAND the desired range

g) Turn on your radio and place it on AM or FM to tune

h) Press the PTT and wait for the AT- 250 automatically tune

i) Note that the stationary will lowering until the light turns off TUNE

k) For new tune, repeat the above steps

High-gain Loop antenna

Many radio amateurs seek and find in your daily life, various designs of antennas. Some practices, others do not. Mostly all the antennas work, but unlike the manner for which they were designed. Loop antennas work basically like resonant magnetic fields that feed electrically our receivers. For diverse experiences, it is understood that the loops must cover perfectly the radio spectrum from very long Wave (VLF) to Tropical Waves.

In order not to shoot down very technical segment, we propose here a loop antenna resonant high-gain, not only by the height of your frame, but because it is rotating through a single axle and also be mounted as vertical crosshead. This increases, and the sensitivity of its vertices and pretty, and very low noise levels, because the tangents of radio wave, usually horizontal, not reflected in their turns. The Assembly is self-explanatory, not fitting here too much details, but some considerations must be made:

-Give preference to mount this antenna with wooden frame. An experimenter mounted system with PVC pipes and curiously the physical instability of the system showed signs of background noise. The balance of the system produces small variations of tension, which the receiver, it becomes noise;

-Place the variable capacitor on the outside of the magnetic field, i.e. outside of the coil. The "Q" factor of windings in resonance with the variable is vastly more stable and electrically speaking, the antenna becomes resonant with much higher accuracy;

-use a plastic button to operate in variable. The electric charge of our bodies makes the very sensitive variable, what instabiliza the antenna;

-make sure that the shaft and rotating base support are free to rotate. If necessary, place a little oil between backups;

Let's go to the Assembly:

Materials:

2 pieces of wood, cut to the extent of 61 cm long by 4 wide and 2 cm in height.

1 variable capacitor of 1 or 2 sections, whose total capacity exceeds 420 PF. Experiences must be made with other variables.

PS: miniature type capacitors, of American origin were tested, but not presented good yields.

Wood for the base and a second piece, thinner, as swivel base

1 potentiometer that will be broken, where will be used only the shaft and base

4 small screws (2 mm)

37.80 meters of enameled wire, copper or transformer winding, whose section is next to or greater than 1 mm.

The Loop Antenna itself consists in mounting a cross with pieces of wood. The differential of this proposal is that at the base of the vertical frame, there will be a second base, transfixed by the potentiometer shaft, supported by a wooden base. Electrically, this antenna has 17 turns thirty, consuming 37.80 feet of wire on average. Full Coverage of track between 520 to 1710 Khz.

The crosses have 61 cm long by 4 cm wide and 2 cm in height, can be cut directly into a lumberyard or home construction materials to, but if not possible, lower court measures are: 2 cm to the Center crease, which can be found through cross-cutting risks (see illustration). The spacing of the cuts of the adjacent Sciences is 29.5 cm. The depth is 2 cm, as the height (vertical thickness) of wood.

Base:

The base of the antenna is composed of a piece of wood with at least 20x15 cm area, minimum to support the weight of the set. The height (thickness) of this wood should be about, it's possible to drill the base to secure the shaft of the potentiometer. In the same way that this axis must be drilled and screwed on this same basis.

The winding must be initiated by the swivel base, where already will set the variable capacitor. will be made, 17 wire ties very well stowed, where to complete the 17 will be made another half, where in any of the points, this wire will be taken to the other end of the variable to facilitate the start of winding can be fixed together with the base of the variable and its end, after the soldier isolated polo.

The final design was with 17 turns thirty, but there is a very important point to be seen during the entire Assembly: the real capacity of the variable.

If there are too many turns, the resonance of the antenna won't get much more than 1500 Khz, and if there are turns of less, the antenna will cover after the 800 Khz, on average and follow until the 2100 Khz, which can be a prejudice only.

To avoid this, do as was done in the prototype: wrap a few turns 19 (40 feet of wire) and several rolling out every 1/4 of the frame. Turn on and test. With the enclosed variable, you must tune in the beginning of the track and with him wide open, the end. To continue hitting, just go down the wire that the value will be found.

In the final version, was installed a variable Douglas (Windsor, UK) with 2 interconnected sections, whose capacity should be next of the 680 pf, more or less. Experiences must be made with several variables and various sizes of wire. Always among the 17 and 19 turns.

Rotating Base:

The rotating base is an adaptation of a piece of wood no more than 10 mm thick for 35 in length which must be cut in the proportion of 2/3 of length for setting the variable capacitor and the support to the recipient. The holes of the bottom can be given in the graph. At this point, it is not crucial to the clearance of 2 mm between each coil. As the base, this factor does not interfere so fatally in the proper functioning of the system.

During the winding of coils, variable shaft and screws should be placed in their holes, to prevent breaking the wire into your retrofitting. In the prototype, the variable shaft has 6 inches of length. To make the holes was used a drill for wood number 8. The screws have 2 mm thick by 115 mm overall length. A proportional view of bindings can be seen in the illustration:

 Partial view of a proposed location of the receiver after the Assembly. The variable and their bindings are on one side and the other, a base is placed to support the receiver.

TABLE OF COAXIAL CABLES

 Referência Ohms Velocidade pF/m 30 MHz perdas dB 100 MHz perdas  dB 400 MHz perdas dB Diâmetro Dielétrico RG-5/U 52,5 0.66 93,5 6,20 8,8 19,4 8,4 PE RG-5B/U 50,0 0.66 96,8 6,20 7.9 19,4 8,4 PE RG-6A/U 75,0 67,0 6,20 8,9 19,4 8,4 PE RG-7/U 95,0 41,0 7,8 17,0 RG-8/U 50,0 5,0 6,3 13,8 10,3 RG-8/U 52,0 0.66 97,0 4,70 6,3 13,4 10,3 PE RG-8/U 50,0 0.80 83,3 10,3 PEF RG-8A/U 50,0 0.66 100,0 4,70 6,2 13,4 10,3 PE RG-8A/U 52,0 0.66 97,0 5,8 13,5 RG-8mini 80,0 0.67 80,0 0,98 3,3 7,5 6,1 PEF RG-8 XX 50,0 0.80 7,04 6,2 PEF RG-9/U 51,0 0.66 98,4 4,90 6,5 16,4 10,8 PE RG-9A/U 51,0 0.66 98,4 4,90 6,5 16,4 10,8 PE RG-9B/U 50,0 0.66 100,0 4,90 7,6 16,4 10,8 PE RG-10A/U 50,0 0.66 100,0 4,30 6,2 13,4 12,1 PE RG-11/U 75,0 0.66 67,2 5,30 7,5 15,8 10,3 PE RG-11/U 75,0 0.80 55,4 10,3 PEF RG-11A/U 75,0 0.66 67,5 4,00 7,5 15,7 10,3 PE RG-11A/U 75,0 0.66 68,0 4,00 7,5 15,7 10,3 PE RG-12/U 75,0 0.66 67,5 5,20 7,5 15,7 12,0 PE RG-12A/U 75,0 0.66 67,5 5,20 7,5 15,7 12,0 PE RG-13/U 74,0 0.66 67,5 5,30 7,6 15,8 RG-13A/U 75,0 0.66 67,5 5,20 7,5 15,7 10,8 PE RG-14A/U 50,0 0.66 100,0 3,30 4,6 10,2 13,8 PE RG-16/U 52,0 0.67 96,8 4,0 16,0 RG-17/U 52,0 0.66 96,7 2,03 3,1 7,9 22,1 PE RG-17A/U 52,0 0.66 98,4 2,03 3,1 7,9 22,1 PE RG-18/U 52,0 0.66 98,4 2,03 3,1 7,9 22,1 PE RG-18A/U 50,0 0.66 100,0 2,03 3,1 7,9 24,0 PE RG-19/U 52,0 0.66 100,0 1,59 2,3 6,1 PE RG-19A/U 50,0 0.66 100,0 1,50 2,3 6,1 28,4 PE RG-20/U 52,0 0.66 100,0 1,50 2,3 6,1 30,4 PE RG-20A/U 50,0 0.66 100,0 1,50 2,3 6,1 30,4 PE RG-21A/U 50,0 0.66 100,0 30,50 42,7 85,3 8,4 PE RG-29/U 53,5 0.66 93,5 14,4 31,5 4,7 PE RG-34A/U 75,0 0.66 67,2 2,79 4,6 10,9 16,0 PE RG-34B/U 75,0 0.66 67,0 2,79 4,6 10,9 16,0 PE RG-35A/U 75,0 0.66 67,3 1,90 2,8 6,4 24,0 PE RG-35B/U 75,0 0.66 67,0 1,90 2,8 6,4 24,0 PE RG-54A/U 58,0 0.66 87,0 10,5 22,3 6,4 PE RG-55/U 53,5 0.66 93,5 10,50 15,8 32,8 5,3 PE RG-55A/U 50,0 0.66 97,0 10,50 15,8 32,8 5,5 PE RG-55B/U 53,5 0.66 94,0 10,50 15,8 32,8 5,5 PE RG-58/U 50,0 0.66 95,0 16,1 39,5 5,0 PE RG-58/U 53,5 0.66 93,3 15,3 34,5 5,0 PE RG-58/U 75,0 0.79 55,5 15,1 34,5 6,2 PEF RG-58A/U 53,5 0.66 93,5 10,90 16,0 39,4 5,0 PE RG-58B/U 53,5 0.66 93,5 15,1 34,4 5,0 PE RG-58C/U 50,0 0.66 100,0 10,90 16,1 39,4 5,0 PE RG-58XX 50,0 0.80 6,60 6,2 RG-59/U 73,0 0.66 68,6 7,90 11,2 23,0 6,2 PE RG-59/U 75,0 0.79 55,5 6,2 PEF RG-59A/U 75,0 0.66 67,3 7,90 11,2 23,0 6,2 PE RG-59B/U 75,0 0.66 67,0 7,90 11,2 23,0 6,2 PE RG-62/U 93,0 0.84 44,3 5,70 8,9 17,4 6,2 PEA RG-62/U 95,0 0.79 44,0 6,2 PEF RG-62A/U 93,0 0.84 44,3 5,70 8,9 17,4 6,2 PEA RG-62B/U 93,0 0.86 46,0 9,5 20,3 6,2 PEA RG-63B/U 125,0 0.76 36,0 4,9 11,2 10,3 PE RG-67B/U 93,0 0.70 PE RG-71B/U 93,0 0.66 46,0 5,70 8,9 17,4 6,2 PEA RG-74A/U 50,0 0.66 100,0 3,30 4,6 10,2 15,7 PE RG-79B/U 125,0 0.74 36,0 16,0 11,5 PE RG-83/U 35,0 0.66 144,4 9,2 10,3 PE RG-84A/U 75,0 RG-112 /U 50,0 0.66 100,0 45,0 4,1 PE RG-114A/ 185,0 0.66 22,0 42,0 10,3 PE RG-122/U 50,0 0.66 100,0 14,80 23,0 54,2 RG-133A/U 95,0 0.66 53,0 10,3 PE RG-141/U 50,0 0.70 96,5 10,8 22,6 4,9 T RG-141A/U 50,0 0.69 96,5 10,8 22,6 4,9 T RG-142/U 50,0 0.70 96,5 12,8 26,3 5,3 T RG-142A/U 50,0 0.70 95,0 9,00 12,8 26,3 5,0 T RG-142B/U 50,0 0.70 96,5 12,8 26,3 5,0 T RG-164/U 75,0 0.66 67,0 2,00 2,8 6,4 22,1 PE RG-174/U 50,0 0.66 101,0 17,00 29,2 57,4 2,6 PE RG-174A/U 50,0 0.66 100,0 21,70 29,2 57,4 2,5 PE RG-177/U 50,0 0.66 100,0 2,03 3,1 7,9 22,7 PE RG-179B/U 75,0 0.70 2,5 T RG-180B/U 95,0 0.70 3,7 T RG-187A/U 75,0 0.70 52,5 2,8 T RG-188A/U 50,0 0.70 95,0 17,00 37,4 54,8 2,8 T RG-195A/U 95,0 0.70 3,9 T RG-196A/U 50,0 0.70 95,0 27,00 43,0 95,0 2,0 T RG-212/U 50,0 0.66 100,0 6,20 8,9 19,4 8,4 PE RG-213/U 50,0 0.66 97,0 3,20 6,3 13,5 10,3 PE RG-213/U 50,0 0.66 97,0 3,20 6,0 13,0 10,3 PE RG-213/U 50,0 0.66 101,0 3,20 7,0 13,5 10,3 PE RG-213/U 52,0 0.66 101,0 4,30 6,2 13,5 10,3 PE RG-213foam 50,0 0.772 73,0 1,95 11,6 10,3 PEF RG-213 50,0 0.66 101,0 2,45 10,3 PE RG-214/U 50,0 0.66 100,0 4,90 7,6 16,4 10,8 PE RG-214 US 50,0 0.66 101,0 3,20 5,7 13,0 2,1 PE RG-215/U 50,0 0.66 101,0 4,30 6,2 13,5 2,1 PE RG-216/U 75,0 0.66 67,0 5,30 7,6 15,8 10,8 PE RG-217/U 50,0 0.66 100,0 3,90 4,6 10,2 13,8 PE RG-218/U 50,0 0.66 100,0 2,03 3,1 7,9 22,1 PE RG-219/U 50,0 0.66 100,0 2,03 3,1 7,9 PE RG-220/U 50,0 0.66 96,8 1,50 2,3 6,1 28,5 PE RG-221/U 50,0 0.66 100,0 1,50 2,3 6,1 30,0 PE RG-222/U 50,0 0.66 100,0 30,50 42.7 85,3 5,5 PE RG-223/U 50,0 0.66 101,0 10,50 15,8 32,8 5,3 PE RG-224/U 50,0 0.66 100,0 3,30 4,6 10,2 15,6 PE RG-225/U 50,0 RG-302/U 75,0 0.70 69,0 5,2 T RG-303/U 50,0 RG-316/U 50,0 0.70 95,0 17,00 28,0 2,6 T RG-331/U 50,0 0.78 RG-332/U 50,0 0.78 RG-7612 25,0 0.696 Aircom + 50,0 0.84 84,0 1,80 3,3 7,4 10,3 PEA Aircell-7 50,0 0.83 74,0 3,70 6,9 7,3 PEA Bamboo 3 75,0 0.89 1,9 17,5 PEA Bamboo 6 75,0 0.88 3,7 10,5 PEA CAF1,1/5,3 75,0 0.82 54,0 2,90 5,3 7,4 PEF CAF1,6/7,3 75,0 0.82 54,0 2,10 3,9 9,8 PEF CAF1,9/8,8 75,0 0.82 54,0 1,70 3,2 11,3 PEF CAF2,5/11,4 75,0 0.82 54,0 1,40 2,6 13,9 PEF CAF3,7/17,3 75,0 0.82 54,0 0,91 1,7 20,3 PEF CF1/2" 50,0 0.82 82,0 1,28 2,4 16,0 PEF CF1/2" 60,0 0.82 68,0 5,80 3,1 16,0 PEF CF1/2" 75,0 0.82 54,0 4,90 2,6 16,0 PEF CF1/4" 50,0 0.82 82,0 2,40 4,5 10,0 PEF CF1/4" 60,0 0.82 68,0 2,30 4,3 10,0 PEF CF1/4" 75,0 0.82 54,0 2,30 4,3 10,0 PEF CF3/8" 50,0 0.82 82,0 1.9 3.5 12.1 PEF CF5/8" 75,0 0.82 54,0 1,00 1,9 19,6 PEF CF7/8" 50,0 0.82 81,0 0,71 1,4 28,0 PEF CF7/8" 60,0 0.82 68,0 0,69 1,3 28,0 PEF CF7/8" 75,0 0.82 54,0 0,69 1,3 28,0 PEF CT 50/20foam 50,0 0.80 2,33 10,3 CX2/6 50,0 0.63 97,0 2,80 5,3 PE CX4/12 50,0 0.63 97,0 1,52 2,9 PE HCF1/2 50,0 0.75 85,0 2,00 3,7 13,5 PEF Heliax 1/2 50,0 0.88 75,0 1,24 16,7 HFE1,5/6,5 60,0 0.66 84,0 3,50 6,6 8,8 PE H100 50,0 0.84 80,0 2,10 8,4 9,8 PEA H155 50,0 0.79 100,0 3,40 9,4 5,4 PEF H500 50,0 0.81 82,0 4,10 8,7 9,8 7,0 PEF H1000 50,0 0.83 10,3 H2000 50,0 0.80 81,6 2,20 10,3 PEF LCF1/2" 50,0 0.87 76,0 1,23 2.3 16,0 PEF LCF7/8 50,0 0.87 76,0 0,66 1,3 28,0 PEF LDF4/50A 50,0 0.88 77,1 5,0 16,0 3/8" 50,0 0.79 3,9 8,1 10,3 TU-165 50,0 0.70 95,0 41,0 2,2 T TU-300 50,0 0.70 95,0 25,0 3,6 T TU-545 50,0 0.70 95,0 14,0 6,4 T

 Approximate loss in decibels per meter coaxial cable (cable quality can change the values) Type Loss  (dB/m) External diameter (mm) Impedance  (Ohms) RG8 0.39 10.29 50 RG8X 0.6(?) 6.15 50 RG58C 0.90 4.95 50 RG59 0.51 6.15 75 RG142/RG400 0.59 4.95 50 RG174 1.39 2.8 50 RG188 1.26 2.74 50 RG316 1.28 2.49 50 Belden 9913  (RG8/U) 0.20 10.29 50

G5RV ANTENNA

The G5RV is today a very popular dish in the HF bands. Despite widespread use in these tracks, there are some myths and erroneos concepts relating to her. This seems to be a part of your own existence. To light the text "Antenna Compendium, Volume 1, I would like to clarify a few topics about this versatile antenna, tipping, even some myths erroneously created.

Starting let's hear Louis, G5RV, (the AUTHOR of the project) of West Sussex, England, recently deceased with 90 years of age: "the G5RV antenna, with its arrangement of special food, is a multiband antenna fed in the central part, and can operate efficiently in HF, 3.5 to 28 MHz. Its dimensions are specifically designed to operate in areas of limited space (inverted V)but you can "stretch" for reasonably priced 31 metres when fully operated stretched. Additionally, Louis States that, "Unlike multiband antennas, in General, the G5RV drawn in full length version was not designed as a half-wave dipole on frequency lower power operation, but rather as a long-wire with 3/2 wave fed in downtown 14 MHz, where the 10.36 m of open line work as an impedance transformer 1 : 1. This causes the feed, with open lines of 75 Ohm coaxial cables or 50/75 Ohms can lead us to a perfect food in this band, with a consequent very low SWR.

However, in all other HF bands, this section the marrying kind serves as a makeup, accommodating part of stationary were (components of current and voltage), which, in certain instances, operating frequency cannot be completely accommodated in version fully stretched or even V-inverted. The frequency of the central design of the full-sized version is 14.15 Mhz. and the dimension of 31.27 is derived from mathematical expression for the calculation of long-wire antennas, that is:

LENGTH = 149,95(n -0 ,05)/f(MHz)

= (149,95 x 2,95)/14,15

= 31,27 m

where n = the number of half wavelengths of wire (stretched version)

Considering that the entire system will be taken to the resonance frequency by use of an antenna coupler, in practice, the antenna is cut with 31 metres. As the antenna does not makes use of "traps" or the dipole part of the ferrites, same becomes progressively more long (electrically) with increasing frequency. This effect gives certain advantages over the use of "traps" or because the ferrites, addition of electrical length, the largest blood cells wool vertical polar diagram component tend to decrease as the frequency rises. Thus, from 14 Mhz upwards, good part of the energy radiated in the vertical plane is made interesting angles on DX.

In addition, changes of polar diagram with increasing frequently tend to a half-wave dipole typical in 3.5 MHz,a two-phase half-wave on 7 and 10 MHz and for a long-pattern wire in 14, 18, 21, 24 and 28 MHz. Although the perfect impedance adjustment with open line 75 ohm or 75 Ohm coaxial at the entrance to the section the perfect fit is good at 14 MHz, and may also result in an SWR of 1: 1.8, with 50 Ohm coaxial cable, in this band, the use of a coupler of impedance instances is required in all other bands, because the antenna over the section of perfect fit had a reactive load to feeder, in these other tracks. Thus, the use of the correct impedance adjuster type instances is essential in order to ensure the transfer of maximum power to the antenna, from a typical transceiver that has impedance of 50 ohms (unbalanced) output. Where as the modern transceivers use protection against high SWR, starting his action from relations of 2: 1, the coupler will help, too, to release all its power. Most of these transceivers already possess internally, these automatic couplers, that lend themselves perfectly for this purpose.

THEORY OF OPERATION

Here follows the general theory of operation. As I cannot attach the file transmission diagrams, I follow the text of the ARRL "Antenna Compendium, Volume 1, which is an excellent literature for the fans of antennas (THIS is NOT an ADVERTISEMENT, JUST a NOTE to the ...) Remember that these information are part of the theory and the operation itself will depend upon the installation height over the ground, metal restraints, power lines, trees, etc.

3.5 MHz

In this range, the antenna acts as a half-wave dipole type shortened, with roughly 5.18 m. total length. The remainder of section of impedance matching instance introduces a reactance inevitable for the antenna, from the point of feed and feed the antenna diagram is effectively equal to a half-wave dipole in this band.

7 Mhz

The total length, plus the 4.87 m adapter section transform G5RV in a collinear with 2-phase half-wave, partially folded up. The diagram of antenna irradiation is higher now than a dipole because of its characteristics of collinear. The coupling is slightly degraded due to inevitable reactance level, introduced by the extra length in the adapter section. This reactance can easily be eliminated with an antenna tuner (ATU).

10 MHz

In this range, the antenna works like a collinear 2 half-wave. Is very effective, but the reactance presented to the point of food requires a good antenna tuner (ATU). The diagram of irradiation is basically identical to the standard 7 MHz.

14 MHZ

This track is where the G5RV really shines. The antenna is operating as an antenna 3/2 wavelength, fueled by the Center with a diagram of irradiation with many wool blood cells, low irradiation angle, around 14 degrees of elevation, which is very efficient for DX, the most popular of the DX bands. The antenna features a load resistance of 90 ohms, basically not showing reactance. The feed with 50 ohm coax cable will introduce a SWR of 1.8: 1, easily engaged by an antenna tuner.

18 MHz

The antenna works as 2 full waves in phase, by combining a lower angle of irradiation with high bandwidth of a collinear. The load is high impedance, with fairly low reactance.

21 MHz

In this range, the antenna works as a long-wire with 5/2 wavelength, fueled by the Centre. This leads to many wool blood cells, low angle of radiation with high impedance load resistive instance. When properly attuned to the ATU, becomes a highly effective antenna for Dx 's.

24 MHz

The antenna works, again, as a long-wire with 5/2 waves, but due to the reversal in the direction of the current, the load is resistive, approximately equal to load on 14 MHz. Again, the diagram of irradiation is composed of many blood cells, wool with low irradiation angle.

28 MHz

In this band, the antenna works as a long-wire, 3 wavelengths, Center-fed. The diagram of irradiation is similar to 21 or 24 MHZ, but with some advantage, due to the effect of collinear obtained by power of two 3/2 wave antennas in phase. The load is high impedance, with low reactance. In part 3, it will be discussed the construction of the G5RV.

Are specified the dimensions of the G5RV fully extended in part 1. The antenna does not need to be necessarily fully extended, but can be installed as a V-inverted. The center of the antenna should be as high as possible, obviously, and the adapter section should get off at right angle to the antenna. It is recommended that the lower section used for the antenna is copper wire of 2.5 mm², although there are antennas constructed with copper wire 1.5 mm² that are operating very well. If the antenna is mounted as V-inverted, the highest angle (inclusive) must not be less than 120 degrees.

It is recommended that the section's adapter built feeder line open, for minimum loss, because it always will in presence of SWR. Faced with the constant presence of stationary were waves, the impedance of the same is not important. A technique of building satisfying memory to the adapter section of line open would make their own acrylic separators, plastic or similar, with low-loss dieletrico. Plastic strips would be cut approximately 5 inches long and 12 mm. wide, notched to fit the threads of 2.5 mm². Pierce the ends of the tabs in a distance of 1 cm from each end, to then be able to tie the wires in your position the spacers should be mounted to each 30 inches.

Another way to do the adapter section would be using tapes to feed the TV antenna, industrial-grade (not manufactured in Brazil ...) of 300 or 450 ohms, whose section of the wires is, at minimum, AWG20 to AWG16. Open Windows on the plastic part, avoiding the tapes if twist am, by occasion of strong winds. Lastly, and less desirable, (although work), is the commercial television tape. The main disadvantage of this type is the durability. Drivers of this tape are typically in diameter 22 to 28, and the quality of the plastic used for the isolation is very low, deteriorating more quickly in the Sun and rain. The biggest advantage is that is readily available in electronic stores, grocery and hardware store. The quality is proportional to the price, if several types are available. Do not use the "heavy" type (2 isolations), because the additional protection is not achieved the desired result, especially in 3.5 or 7 MHz.

LENGTH OF THE SECTION IS THE ADAPTOR

The length of the adapter section is half-wave ELECTRICAL OUTLET on 14 MHz. the physical length to use is determined by the following formula:

L = (149,95 x FV)/f(MHz)

where FV is the speed factor of the adapter section. The result is obtained in meters.

The speed factor is determined by the type of line and dielectrics properties of their isolation. For the three types of line discussed above, the FV (speed factor) is:

 OPEN LINE 0,97 LINE TYPE INDUSTRIAL TV 0,90 PARALLEL TAPE TV 0,82

Replacing the FV on formula and calculate to a frequency of 14.15 MHz, you Gets the following lengths for the impedance adapter instances.

 OPEN LINE 10,28 m LINE TYPE INDUSTRIAL TV 9,53 m PARALLEL TAPE TV 8,69 m

The impedance adapter instances is connected to the center of the antenna, and descend vertically at least 6 meters or more, if possible. From there, he can be tied or folded, connecting to the same coaxial cable, taking until the antenna coupler or straight to the equipment if the even own internal Coupler.

THE POWER LINE

In the original article that described the G5RV antenna, published in "RSGB BULLETIN", November 1966, it was suggested that, if a coaxial cable was used to feed the antenna, a balun could be employed to do the required balancing, right at the base of the adapter section. However, more recent experiences and a better understanding of the theory of operation of baluns indicated that such a device was inadequate due to high load reatance, presented at the base of the adapter section. Consequently, We Dont USE A BALUN On G5RV.

If a balun is connected to a line with SWR not less than 2:1, their internal increase losses. the result of this is the heating of ferrite Toroid, with eventually ¼ ente saturation. Operating saturated, the Toroid can distort the RF waves, generating harmonic, and, in extreme cases, with high power, literally destroy the Toroid. An antenna tuner may quietly accommodate variable loads, cancelling the reatance present, reducing the energy of harmonic gifts, which, by the nature of multiband G5RV, could be irradiated. Generally speaking, the existing equipment in modern couplers engage easily all the bands of the G5RV, with exception of 10 Mhz.

THE ALTERNATIVE POWER SYSTEM

Doug DeMaw, W1FB, W1FB's ANTENNA BOOK "of his own, puts the G5RV can be fed with open line, straight to the ATU. If this is done, the antenna will load on all tracks without problems. In this case, the ATU should have an exit to open line, in such a way that make the wedding in all bands. This would assist in operations, laptops where the operator could use an open line and a small tuner designed for this kind of lines, carrying on all HF bands. is an intelligent solution, that would decrease the weight of equipment to be transported in operations laptops. An interesting open line length would be 21.9 metres, allowing whole antenna and the open line were wrapped in a small bucket or spool empty thread, making it easier to transport.

Finally, if you need a good multiband antenna and discrete for your station, give a chance to the G5RV.

ARRL "ANTENNA COMPENDIUM", VOLUME 1 / ARRL "W1FB'S ANTENNA NOTEBOOK" / " W1FB'S ANTENNA NOTEBOOK " / ARRL "W1FB'S NOVICE ANTENNA NOTEBOOK" / TAB PUBLICATIONS "73 WIRE AND DIPOLE ANTENNA" / EDITORS AND ENGINEERS "RADIO HANDBOOK"

Using the G5RV 160-10 meters as V-Inverted

The G5RV 160-10 meters, which is a double G5RV (G5RV) x 2, may be used with better performance at the end of the HF spectrum, configuring it as a V-inverted. Electrically, the (G5RV) x 2 is a dipole with 3/2 wave dipole 40 meters, or wave 0.75 per side. In this configuration, it will be bi-directional sharper qualities, with wool directional blood cells more pronounced. To use a V-Inverted as a multiband HF antenna, the user should design it to the middle of the desired range. For example, if you want to use it from 20 to 10 feet, then the angle of pice is computed for the 15-meter band. Using this logic, the length of each side is 2.25 wavelengths, requiring an angle included around 70 degrees.

Using an angle of 70 degrees, will result in an antenna supported by top with two side Joiners, forming a triangle of 3 equal sides (not the Rectangle) with "legs" of 3 supports, forming a triangle, with sides of 31.1 metres and base of 50.9 metres. Is a large triangle with height (highest point) of 17.83 metres. The directivity is along the plane formed by the sides and height, being bi-directional. Approximate gain, is shown in the table below, where they are tabulated winnings for top bands from HF.

 FREQUENCY (Mhz) LENGTH (wave length) GAIN dBd 7,0 0,75 1,5 10,1 1,1 2,5 14,0 1,5 4,5 18,1 1,8 5,3 21,0 2,25 6,0 24,9 2,6 6,5 28,0 3,0 7,0

This table of winnings is optimistic, based on the angle of the pice is correct for the given side length, which does not occur in practice. The gain will be closer on the 15-meter band, being in the band of 40 m the least approximate, but at most 1 dBd of difference. the values of this table are approaching very a small gain directional antenna and the opening angle could cover, with all certainty, the Brazil, from North to South. (if mounted in direction East-West).

SOME EXAMPLES Of G5RV

Multiband G5RV antenna is a very popular project in the HF bands. The most popular of them is configured as a 3/2 wave dipole on 20 meters, and works as both a shortened dipole or a long-wire fed as collinear, in other bands. In this configuration, the total length is 31.1 meters, with an adapter section ranging from 8.53 m to 10.36 m. in some cases, it may be too long to adapt is their land and are not all that can convince your neighbors to accept one of his "legs" on your property. In these cases, a version equivalent to half of the previous one, covering 7 to 28 MHz can be used. The reciprocal is true: some amateurs would operate at 1.8 MHz, living on land that accommodate the 62.18 meters required for this version of the G5RV. Here are some dimensions already calculated, which may be useful:

 BAND    (MHZ) 1.8 - 28 3.5 - 28 7.0 – 28 NORMAL VERSION 62,18 m 31,1 m 15,54 m FEED OPEN LINE 20,56 m 10,28 m 5,14 m INDUSTRIAL TV TAPE 19,06 m 9,53 m 4,76 m NORMAL TV TAPE 17,38 m 8,69 m 4,34 m

INDUSTRIAL TV TAPE is not found in Brazil. If adopted the option NORMAL TV TAPE (300 OHM TV Ribbon) search for material of good quality. Preferably adopting the first option, which although a little more cumbersome, presents great results, especially when working with higher powers (above 200 watts).

The aforementioned antennas working in 6 meters, often without the aid of antenna tuner!

The antennas listed above, there is a note made by Louis, G5RV, in his article on "ARRL ANTENNA COMPENDIUM, Volume 1, on the version 7-28 Mhz: it refers to the city of Evhan, residence of WB2ELB, which supplies it with a single line, directly built-in coupler your Kenwood and other amateur radio sites, using the 3.5 version-28 Mhzunder the same conditions.

You can build the power line the open line type in many ways. I suggest, personally, that you can use the celeron processor as an insulator, because in addition to their excellent mechanical rigidity has dieletric very good and great durability, even exposed to lightning storms. I've been using the same, in some antennas, for years, without any kind of problems. In case of any doubt, please contact us.

Build a filter and avoid interference in Televisions references (TVI)

Schema for the construction of a simple but effective filter that effectively help to suppress the interference of RF armonics in television receivers.

The reproduction of the text above is authorized as long as the authorship is preserved and mentioned - All rights reserved designed by PY4SM - PY2DD

BASIC THEORIES ANTENNAS

-- WOW -- See this One -- From Navy Training Series
Antenna Basics and Theory -- From Ian C. Purdie, VK2TIP
Antenna Basics and Theory -- Excellent Tutorial From Scott's Pages
Antenna Basics and Theory -- Excellent From Integrated Publishing
Antenna Tutorial -- From AeroCom
Antenna Basic Radiation Theory-- From The ARRL
Antenna Basics and Theory -- Excellent - From VK2DQ
Antenna Construction Tips -- Metals to use. From Bob Hejl - W2IK
Antenna Dimension Calculators -- From The Antenna Elmer - Click On Antenna Type
Antenna Dimensions Calculator-- Dipoles From AMANDX
Antenna Dimensions Calculator - Dipoles From KWARC
Antenna Height? -- How High Should They Be? -- By Mike Banz, AA3RL
Antenna Tuner Theory -- From The ARRL
Antenna Tuners and SWR -- From The ARRL
-- IZ7ATH
Baluns and Choke Baluns -- From Ian C. Purdie, VK2TIP
Baluns - W8JI Antenna Articles Toroid Balun Winding * Balun and Transformer Core Selection * Transmitting Baluns
Choosing Wire For An Antenna
Coaxial Cable Trap Building -- BY Greg Ordy W8WWV
Electromagnetic Waves and Antennas - By Sophocles J. Orfanidis - Lots Of Math! MATLAB library of same
Feed-Lines & Impedance Matching - From "Your Remote S-Meter" Pages
-- From Butternut
Ground and Radial Systems -- From SteppIR Antennas
Ground Characteristics, Lightning Protection Grounds, Radio Frequency Grounds, and Practical Grounding Systems
Ground Systems -- From W8JI

Height Of Dipoles - Patterns By AA3RL
Lightning Protection -- Four Articles
- From Tom W8JI
Noise -- Technical article about noise and receiving/ receiving antennas From Tom W8JI
QuarterWave Antenna installation notes -- includes ground/raised radial info -- From Butternut
-- From Tom W8JI
-- From Tom W8JI
-- From the ARRL
-- Same band and different bands -- From G3SEK
-- From Grantronics
- From Astron Wireless
-- Excellent From Tom W8JI
Tuner, Antenna - How to use. Also shows basic station interconnections - From Hamuniverse.com
- Dirty Little Secrets, Ground/Radial Systems - Click On Tech Notes
-- Trap and Loading Coil Losses With Vertical Antennas By W0DN --By James G. Lee, W6VAT
Simple Z Match Tuner - Via Lloyd Butler VK5BR

has nearly 600 Antenna Articles
ARRL Antenna Projects Web Page -- Includes Beams/Yagis, Dipoles, J-Poles, Quads, Slopers, Verticals, Other HF Antennas, VHF Antennas

Antennas A Bunch -- From Ham Radio Spectrum

Dr. Ace's Antennas -- From WH2T -- Inverted L, Mini Super Loop, Full Wave Loop, Double Bazooka Coaxial Dipole, Homebrew 4:1 Balun

-- Loaded with ideas -- dB, dBi, and dBd, -- Invisible and Hidden Antennas -- About SWR

Antenna Application Notes -- Antenna and Feedline Measurements, Return Loss Bridge Basics, Duplexer Tuning using Bridge

Antenna Design and Software From G4FGQ -- Loaded -- many antenna design programs, coax rating, ferrites and toroids, Groundwave propagation

N4UJW Antenna Design Lab --- Loaded

N0LX Antenna Page - Lots of Mobile Antennas

W8JI Antenna Articles -- Receiving * Crossfire Phasing * Transmitting * Combiner and Splitters * Toroid Balun Winding * Balun and Transfomer

Massive Antenna Page -- From "Your Remote S-Meter" Pages

Antennas from QRZ Shareware -- over 40 antenna files
ARRL Antenna Projects Loaded With Many Antenna Projects
AA3PX Antenna Page -- Conversations with Dr. Harold H. Beverage
Antenna Analyzers -- Manufacturers
Antenna Discussions -- Lots Of Antenna Info From the CQ Contest Archives
Antenna Discussions -- Tons of Antenna & Tower Info From the Tower Talk Archives
Antennas for Portable Use
-- Comparisons
Antenna Height? -- How High Should They Be? -- By Mike Banz, AA3RL
Antenna Projects From The YCCC -- Double-L For 80/160, Two Wire Beverage,160 Meter 4-Square, Using a 4 square Vertical
Antenna System Evaluator
-- From KD6DKS
Antennex -- The Ham Antenna Magazine -- all about antennas -- on line
All-band Wire Antenna - From Joe Tyburczy, WB1GFH

BackPack Antennas
-- From HFpack, The HF Portable Group.
Balloon and Kite Antennas On The Top Band -- From G4VGO
Balloon Antennas -- From HCDX
Baluns From IZ7ATH
Battle Creek Special -- Info From PI4CC Contest Club
Battle Creek Special -- Info From OK1RR -- Under Antennas
Bazooka Antennas
-- From WE6W
-- From The ARRL
Beverage Antennas -- From The DX Zone
Broadside Arrays -- From Integrated publications
Broomstick Special -- A compact, easy-to-build shortwave antenna
BuddiPole HomeBrew -- From W3FF

- W2BLC
Coax Connector Installation
Coaxial Monopole -- From OE1MWW
Top Loading, Matching Networks, SWR, Open Wire Line -- Tons More From G4FGQ
Collinear Arrays -- From Integrated publications
Corner Reflector Antennas -- From By VE3RGW
Cross Field Antennas
-- by Maurice C. Hately GM3HAT & Ted Hart W5QJR
--- From The ARRL
Cubical Quads 10-12-15 Meters From IZ7ATH
Cubical Quad - Multiband - By EI7BA
Cushcraft R5 Vertical Maintenance and Repair -- Click on ANT, then the little colored circle next to the word Cushcraft. Nice article well done
Cushcraft R5 Matching Unit Rebuild -- by G0WCW using EI7BA method
Cushcraft R7 Vertical...Maintenance and Repair
Cushcraft Trap - Coaxial Capacitor Repair - R5, R7, etc,

-- From The ARRL
Dipole Antenna Calculator and construction details -- From AMANDX
Center-Fed Half-Wave Dipole - Nice Illustration From K7MEM
Discone Antenna Design -- From QRZ
Discone Antenna Project - From William Sheets K2MQJ and Rudolf F Graf KA2CWL
Discone - Parabolic - by Mike Lake KD8CIK - Highest gain discone antenna ever!
Dipole Height
-- How High??
Double Extended Zepp Dipole -- Cut for 15 Meters
Duplexer (Diplexer) 2m / 70cm AND Duplexer (Diplexer) HF + 6m / 2m + 70 cm HB9ABX
DXpedition Antennas for Salt Water Locations - Vertical Or Yagi ??

EH Antenna Forum -- Yahoo
EH Antennas
- How They Really Work From Tom W8JI
EggBeater Antenna - VHF/UHF From Jerry, K5OE
EggBeater Antenna - Commercial Product From M squared -- See EB-144 "Eggbeater"
EME Antennas -- Loaded With Big Antennas
End Fed Half Wavelength Antenna -- From AA5TB
Tuner Design for Half-Wave Vertical & Similar-Length End-Fed Antennas From R.J.Edwards G4FGQ ©

-- From Integrated publications

-- From M0WYM
Ferrite Loop Antenna -- for BC band -- From Oceanstate Electronics
Fiber Glass Rods And Tubes -- From Max Gain Systems
Four Square Vertical Phased Array -- From The Yankee Clipper Contest Club
Flags and Pennants
-- Receive antennas for limited space with good noise rejection.
-- From Joe Tyburczy, WB1GFH
-- From The Yankee Clipper Contest Club

G5RV Design and length Considerations -- From AA1LL
Grounding Is Key To Good Reception -- From John Doty
GRASSWIRE -- By K3MT

Hair-Pin MonoPole -- A shorty From
Wilfred Caron
-- From K3KY
, No Radials Antenna -- From OE3MZC
2M-- From N2KBK
2M Square -- From N4UJW
6M -- From W3DHJ
-- From The N4UJW Antenna Design Lab
construction of small HF antennas to provide the same efficiency as large antennas.
- Various -- From The ARRL
- HomeBrew -- From DK7ZB
- Patterns By AA3RL
- via EI7BA
-- From K7HC
HT Extension Antenna - The Tiger Tail

-- multi-band vertical dipole antenna used for quick set-up and quick band change -- From W2IK
vertical, all band, antenna, 25 feet tall, under 5 pounds! With a tuner covers the amateur radio HF bands from 40 - 10 Meters.
Inverted L Antennas By Arnie Coro(CO2KK)
Inverted Vee Antenna
-- From The N4UJW Antenna Design Lab
Inverted Vee Antenna Design -- Nice Illustrations - From K7MEM

-- From The ARRL
Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M
J-Poles Antennas -- Dimensions, matching, everything -- from Bux CommCo -- Be sure to read importance of a decoupling loop.

KQ6XA
-- HF Antenna for the Micro-Light Backpacking Enthusiast
K6STI Receiving Loop
K9AY Receiving Loop
- From G3CWI
Kites For Lifting Antennas From The Hawaii Ham Radio Information Pages
Kites For Antenna Lifting - From G6LFT / M0CUQ

Ladder-Line Back Pack Special -- From W2IK
Liquid Antennas -- Not April 1 stuff
Log Periodic Antenna Calculator
Full Wave Loop Antenna 10M thru 80M -- From Western Canada's Ham Radio YL Site
Loops -- From The ARRL
Loop Antennas
-- Plans for each Amateur Band
Loop Antenna Forum -- Yahoo -- Needs subscribing but lots of info here
Low Band Antennas -- From K3KY
-- From W2BRI
HF Magnetic Loop Antennas -- By Glenn C Sperry, KI6GD
Magnetic Loops -- By Wolfgang DJ3TZ
Magnetic Loop Antenna -- From HB9ABX
Magnetic Loop Design -- From QRZ
Magnetic Loop Antenna's
Magnetic Loop Antenna 10-30 Mhz -- From Matthew G0VBC
-- From W1GHZ
Mobile Antennas -- From The ARRL
Mobile Dual Band VHF/UHF Antenna -- Homebrew Project from VE3RGW
Mobile HF Antenna By HB9ABX
ANTENNA PROJECT - From Mark D. Lowell, N1LO
Moxon Antenna Projects -- 17M and 20M Via KD6WD

- Near Vertical Incident Skywave Antennas -- By Patricia Gibbons - WA6UBE
NVIS II - Near Vertical Incident Skywave Antennas Via WB5UDE
-- For Emergency EmComm folks -- From
Bob, W2IK

Parabolic Discone by Mike Lake KD8CIK - Highest gain discone antenna ever!
Petlowany Three-Band Burner Antenna -- Short vertical antenna - Resonant on 20, 15 and 10 meters, without traps, 12 and 17M with a tuner.
Phasing Arrays - Vertical Antennas -- From Butternut
Portable Antennas -- From The Ham Club At University of Hawaii at Manoa
Portable Antennas -- From HFPack for 20 and 10 meters. - The Flower Pot Antenna from IZØFYL
-- over 40 antenna files
Quad Antennas --- From The ARRL
Quad - Multiband - By EI7BA
Rhombic Antennas 30M - 6M -- From KC0FVV
Rhombic Antennas -- From Integrated publications
Rhombic Antennas -- From Ian Cummings
Feedback Rhombic
-- -- From Ross W1HBQ
Roof Top Tower -- By KB0YKI
Rotary Dipole For 17 And 20

Satellite Antennas
Shortwave Receiving Antennas
Skywire Loop Antenna -- From The ARRL
Skywire Loop -- From Matthew G0VBC
Slinky Antennas -- From Antennas and More
Slinky Antenna for \$10 -- From KG6IIR
Sloper Antennas -- From The ARRL
St Louis Vertical -- From The American QRP Club
Stealth Antennas
Sterba Curtain Antennas
Sterba Curtain Antennas -- From Ham Universe
Sterba Curtain 40M -- from KB8PGW

T2FD Antenna
T-Hunt Antennas
-- From N6KI
HT Extension Antenna
-- From AA3RL
From VE3GK
-- From The ARRL
-- From Integrated publications
-- Photos From W5AJ
-- See how KO4BB did it
-- From Dr. Dave

Vee Antennas -- From Integrated publications Vertical Antennas -- From The ARRL
Vertical Wide Band 7-21 MHz -- The RXO Unitenna -- from G3RXO
Vertical Antennas - Dirty Little Secrets, Ground/Radial Systems, Phased Arrays of Short
Vertical Antennas, Why Radials?- A MUST READ - From Butternut antennas Click On Tech Notes
Vertical Antenna Phasing Arrays - From Butternut Antennas
Vertical Antennas & Ground Screens -- By N6RK
VHF Antennas - Various -- From The ARRL
W5QJR Antenna Via Antennex
W5GI Mystery Antenna Kit -- Kit is at the bottom of the FAQ page, or homebrew info on main page
Water Antennas -- Not April 1 stuff
WaveGuide Tin Can Antennas -- From Gregory Rehm
Windom - 6 Bands - From K3MT and daughter KF4LGR
Yagi -- OWA -- Optimized Wideband Antenna -- Follow On Page By NW3Z
Yagi Optimized Wideband Antennas By NW3Z
Yagi/Beams -- From The ARRL
Yagi Designs
- Lots and Lots -- From TEARA - Click on Knowledge Quest, then topic.
Stacking Yagis -- From The ARRL
Wire Yagis -- from VE7CA

As Transmission Lines and Radiators -- From The ARRL -- Click On Other HF Antennas
-- From The ARRL -- Click On Other HF Antennas

-- By KC2TX
On The Top Band -- From G4VGO
-- Info From PI4CC Contest Club
-- HF Antennas 40/80/160 55 ft Vertical
-- From K3KY
-- Short Dipoles and Verticals for 160m & 80m -- From DJ9RB
-- From The ARRL
-- Double-L For 80/160, Two Wire Beverage, A Poor Man's 160 Meter 4-Square, Using a 4 square Vertical
-- Short Dipoles and Verticals for 160m & 80m -- From DJ9RB
From K5OE
-- 80M Rotating 2 element Quad
-- Short Dipoles and Verticals for 160m & 80m -- From DJ9RB
-- From Ross W1HBQ
-- From QRZ
From EI7BA
80 Metre Slinky Dipole For QRP - From M0WYM
80 Meter Inverted Vee From GERRY VE3GK
80 Meter Antenna
-- Reduced Size For Small Lots
2 EL SHORT BOOM 80M YAGI From VE6WZ.
Short Dipole for 80M -- From 4S7NR
-- From Harry Lythall - SM0VPO
-- By Ben Smith, W4KSY Via Antennex
By Bob W2IK
WB0NNI 40 Meter Linear Loaded Vertical
K5OE Antennas -- HF Antennas 40/80/160 55 ft Vertical
-- By Dave Gauding, NF0R
- for 40M -- Directional Discontinuity Ring Radiator Antenna
-- From W5DXP
-- From QRZ
By PY4VE Via K4TX
-- By W5VM Via K7MEM
-- From FlashWebHost
-- from KB8PGW
-- From W5DXP
-- From KG6IIR
End fed 20/30 Meter Antenna -- From W0VLZ
-- From The ARRL
-- HF Antennas - 10/15/20 m Dipoles
-- 7Element 20M Yagi 63ft Boom
-- 17M and 20M Via KD6WD -- From The ARRL
-- 17M and 20M Via KD6WD

15 Meter Beam -- From The ARRL
-- HF Antennas - 10/15/20 m Dipoles
15M Delta Loop
15M Yagi Optimized Wideband Antenna
From KB4XJ

12M Beam Antennas -- From The ARRL
Two element 10-Meter beam -- From The ARRL
-- From The Antenna Elmer
10M Yagi Optimized Wideband Antenna

No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna -- From W5DXP
-- From VE7CA
Serge, ON4AA
-Band Semi-Vertical Trap Antenna - From Bob Rice, VE3HKY
12- and 17-meter lightweight Yagi -- From The ARRL
All-band Wire Antenna - From Joe Tyburczy, WB1GFH
-- From Ross W1HBQ
One Element Beam 20 Thru 6
Eight Bands On One Coax - The Windom Antenna -- From KH2D
CobWeb Antennas -- 5 Band From G3PJE
-- Via The YCCC

Full Wave Loop Antenna 10M thru 80M
G5RV Multi-Band Antenna by Louis Varney
-- From K4KIO
IK-STIC -- multi-band vertical dipole antenna used for quick set-up and quick band change -- From W2IK
vertical, all band, antenna, 25 feet tall, under 5 pounds! With a tuner covers the amateur radio HF bands from 40 - 10 Meters.

10-80m MOBILE HF MULTIBAND ANTENNA PROJECT - From Mark D. Lowell, N1LO
Multiband Antennas -- From The ARRL
Multiband Dipole Antenna -- From The N4UJW Antenna Design Lab
MultiBand Vee Beam -- Six Band One Element Beam 20 meters thru 6 From LA0HV
Mystery Antenna 80M thru 6M - John P Basilotto, W5GI

Pedestrian 5-Band Mobile Antenna - From W3FF
Petlowany Three-Band Burner Antenna -- Trapless short vertical antenna - Resonant on 20, 15 and 10 meters, without traps, 12 and 17M
Portable All Band Antenna -- A multi-band vertical dipole antenna which can be used in the field for quick set-up and quick band change.
Rotary Dipole FOR 17 AND 20
Spider Beam Portable Triband Yagi -- 10/15/20M
By KR1ST
St. Louis Vertical -- From Dave Gauding, NF0R

Tri-Band 2 Element Portable Yagi -- From Markus Hansen, VE7CA
Two Element Beam I for 10-, 15-, or 20-meters -- From The ARRL
Two Element Beam II for 10-, 15-, or 20-meters -- From The ARRL
Vertical Wide Band 7-21 MHz -- The RXO Unitenna -- from G3RXO
Windom - 6 Bands - From K3MT and daughter KF4LGR
Wonder-Whip AutoTransformer Antenna - 3.5 To 432 MHz !!!! From John M1IOS
W5DXP's No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna

Six Meter Antenna Potpurri By Brian D. Williams, GW0GHF
5/8 Six Meter Vertical -- by G3JVL
50 Mhz Antennas By ON4ANT
Six Meter Antennas A Bunch -- From The UKSMG News
Six Meter J-Pole -- By K4ABT
Super J-Pole Antenna (Collinear Design) - By KB0YKI
Six Meter Halo -- From Steve KB1DIG
Six Meter Halo -- From W3DHJ
Six Metre Portable Dipole For QRP - From M0WYM
-- three elements with a turning radius of 54 inches
Six Meter Sloop By K0FF
Six Metre Long-wire Aerial -- By Brian D. Williams, GW0GHF
Six Metre Indoor Loop
-- By Colen Harlow, G8BTK
Six Metre Antenna
-- By Maurius - ZR6YY
Six Meter Long Wire Antenna - From GW0GHF
Long-wire Aerial for Six Metres By Brian D. Williams, GW0GHF
6M and 2M Yagi -- From The Antenna Elmer
6M Yagis a Bunch -- From The Antenna Elmer
Six Meter Yagi -- From The ARRL
-- From The ARRL
Six Meter Tri-Yagi -- From The ARRL
Six Meter Monster Beam -- 8 element, 41 foot boom, 14.0 dBi gain, By N6CA
Optimised Six-Metre Yagi by Brian Beezley, K6STI
Two portable 6 meters antennas - two-element quad and a three-element yagi with telescoping elements -- From VE7CA

2M/440 MHz Dual Band Copper J-Pole From N7QVC
2M Fan Antenna (Yes From an Electrical fan)
2 M 1/2-Wave J-Pole -- VHF-FM (Stealth) Antenna Made From 450-Ohm Ladder Line -- From KB1GTR & KB1DIG
2M Self Supporting J-Pole for Emergency Use -- From Bob Hejl W2IK
2M Log-Periodic Dipole Array -- From The ARRL
2m 8db collinear for portable use.From M3FVB
2 METER SSB SQUARE LOOP From N4UJW
2m Quagi By W5UN
2M Yagis a Bunch -- From The Antenna Elmer
2M Quadix -- from Ross W1HBQ
2m 8db collinear for portable use.M3FVB
3 element 2-meter Yagi -- From The ARRL
5 element 2-meter Yagi -- From The ARRL
2M 9 Element Yagi
5/8-WAVE COLINEAR "OUTSIDE PVC" 2-METER 146 MHz FM J-POLE Via KB1DIG & KB1GTR
6dB COLINEAR VHF ANTENNA -- From Harry Lythall - SM0VPO
BiQuad For 2m/440 - FROM KE4UYP
Building A 2-meter J-Pole Antenna By Jaden
Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB
The Simplest Collinear -- From Ross W1HBQ
Cycloid Collinear, a CP Omni for 2M from Ross W1HBQ
Desk Buddy 2M Antenna - From Bob W2IK
DDRR - for 2M -- Directional Discontinuity Ring Radiator Antenna
Grid Yagi -- From Ross W1HBQ
Halo Antenna 2M-- From N2KBK
Halo Antenna 2M Square -- From N4UJW
HO Collinear, a Horizontal Omni for 2M from Ross W1HBQ
PacketRadio Operator's Antenna Handbook -- Antenna Basics, 2M & 6M Antennas
SlimJim 2M Antenna
Sperrtof 2M Antenna -- aka Sleeve Dipole or Sleeve J-Pole. By ON4CFC Via Antennex
Super J-Pole Antenna (Collinear Design) - By KB0YKI
VHF/UHF Antennas -- By KB0YKI -- J-Poles, Super J-Pole, Omnidirectional, Quads, Yagis
VHF EggBeater Antenna - From ON6WG / F5VIF
Quick and Simple 2 Meter Ground Plane Project Via HamUniverse

W2IK Quick Stik Emergency Field Antenna For VHF/UHF -- stored in a PVC sewer tube (which also acts as it's lower base)
Cheap Yagi Antennas for VHF/UHF
-- From Kent WA5VJB
Quarter Wave Antenna -- From Artsci
-- From N6ZAV
- By KB0YKI

Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB
-- 432 MHz -- From Via N9ZIA
-- From The ARRL
-- Version I -- From N1HFX
2M/440 MHz Dual Band Copper J-Pole From N7QVC
By N2KBK
- From The Antenna Elmer
- By KB0YKI
HF EggBeater Antenna - From ON6WG / F5VIF
-- By IK1HGE
Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB
Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB
Microwave Antennas and Greg's Wireless Networking Info Page
Curtain Quad for 1296MHz -- From Ross W1HBQ
-- From Ross W1HBQ
2.4 GHz Sardine Can Antenna -- A Double Quad Bow Tie
Shortened 3D Corner Reflector Antenna - For 2.4 GHz - From Dragoslav Dobri YU1AW

CC&R INFO
CC&R's? (You Got) -- Info from the ARRL
K3QK's Legal Resources -- For hams can use it for that "tower project"
eHam.net CC&R Survival Series
FCC Fact Sheet - Over-the-Air Reception Devices Rule Preemption of Restrictions on Placement of Direct Broadcast Satellite
Antenna Restrictions - How To Chart - From The ARRL
Antenna Zoning for the Radio Amateur - ARRL Book On legal aspects of antenna restrictions

HOMEBREW STEALTH ANTENNAS

Balcony Antenna -- From Harry Lythall - SM0VPO
Hidden, Stealth, HF Antennas -- From K3MT -- The GRASSWIRE -- You read it correctly!!
Hidden, Stealth & Invisible Antennas -- Smartuners for Stealth Antennas From SGC, Inc.
Hidden, Stealth, and Secret Antennas from AC6TS
Stealth Amateur Radio - Book From The ARRL -- (ISBN: 0-87259-757-1) #7571
Stealth Antenna Experiences - From Clif's ham radio connection.
10M Bent Attic Antenna - A Yagi No Less
2 M 1/2-Wave J-Pole -- VHF-FM (Stealth) Antenna Made From 450-Ohm Ladder Line --
Small Gauge Wire Makes an "Invisible Antenna
BuddiPole -- W3FF Products
B&W Balcony
/Window Antenna - AP-10A
CliffDweller II antenna
End-Fedz -- full length half wave dipoles, but with an important difference. The coax connector is at one end of the dipole, where it is most needed. From Universal Radio
EZ HANG -- SlingShot & Reel Device for installing wire antennas
Force 12- 9 Foot Vertical
Force 12 Aluminum Flag Poles & Antennas
HamSticks
MFJ Apartment Antenna 40 Meters to 2 Meters MFJ-1622
MinuteMan™ HF Portable Antennas
Stealth Antennas -- HF Mobile Antennas By VE7BOC
Texas BugCatcher - GLA Antennas
Texas Twister - GLA Antennas
Ventennas -- The Forbes Group
Ventanna HFP-2 10 Foot HF Antenna -- 6.5 to 30 MHz !!!
Vern Wright's HF Mobile Antennas, MP1

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