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VHF Antenna with your own hands: homemade construction

A VHF Antenna is a device that is designed to receive radiation. These modifications can only work with short-wave signals. The models differ in frequency. An antenna for a VHF radio receiver is assembled by instruction. In this case, it is important to consider the type of receiver. In addition, it should be noted that there are different types of antennas, which differ in design and parameters.

Model for a simple receiver

The antenna for the VHF receiver is folded by the hands most often on a vertical rack. In this case, it is more expedient to use counterweights in small lengths. A welding inverter is used to fix the supports. First of all, a mast is being prepared, on which the supports will be supported. Its diameter should be at least 1.2 cm. To enhance the reception of the signal, reflectors are used. In many modifications, the racks are installed at a small angle.

The base of the antennas should be made with an overlay. In this case, the counterweights are allowed to be fixed on the insulating tape. Experts say that steel pipes for this will work well. For models with negative directivity, a reflector is used. The element is mounted on the edge of the mast.

Device with one rack

An antenna for a VHF radio receiver is made with different frequencies. The models differ in their conductivity and magnification. When assembling the device, it is important to prepare a strong mast. Experts advise to use hollow posts with low weights. The diameter should be at least 2.2 cm. If we consider models for low-frequency receivers, then the counterweights can be selected from stainless steel. It is not necessary to install the patches.

Reflectors for antennas are used at different frequencies. On the market often there are modifications with petals. They have a high gain. However, it should be noted that they are difficult to produce independently. The front stops can be soldered using a welding inverter. The edges of the antenna must be carefully ground. Racks should be used with a diameter of 0.3 cm. To combat resonance noise, special impulse reflectors with high conductivity are used. Models with horizontal stops are produced with only one mast.

Model with two racks

With two racks, the VHF antenna is assembled with its own hands on a wide mast. Models of this type are suitable for receivers of different series. As a rule, models have a high resistance parameter, they are able to operate at a frequency above 300 MHz. Many devices use several reflectors. During the assembly of the model you need to do the central mast. As a rule, specialists use small diameter tubes with sharpened ends. Also it should be noted that there are models with tips. In this case, the counterweights can be installed at different angles. The length of the rack for a simple antenna is 22 cm.

To increase the gain, steel pipes are used. There are also petal modifications. They operate at a frequency of 200 MHz. The direction of the action of the antennas may be different. The lower part of the rack of the device is isolated. The reflector should be well fixed. The counterweight can be installed in a horizontal position.

It should also be noted that to overcome phase interference it is worth using elongated reflectors. The mast must withstand large overloads. Antennas of this type do a remarkable job of negative polarization. However, in this case it is necessary to consider the type of receiver and its limiting frequency.

Horizontal antennas

Horizontal antennas can be assembled with counterweights of different shapes. Simple modifications are made on straight masts. There are also a number of high frequency devices that are manufactured with a linear reflector that is installed at the bottom of the rack. Horizontal antennas have a high impedance coefficient. They are capable of operating at a frequency of 200 MHz.

Many models are equipped with double counterweights. The masts are used in diameter from 1.2 cm. Some devices are suitable for working with domestic receivers. They have a high standing wave ratio. Racks are usually installed at a right angle. Counterweights are only in front of the device.

Vertical modifications

Vertical antennas are capable of operating at different frequencies. Modifications of this type have a high gain. It makes a vertical VHF antenna for the radio with their own hands quite simply. First of all, you need to pick up good racks, pre-prepare a welding inverter. To solve problems with negative polarization, it is recommended to use pulse reflectors. In this case, the counterweights need to be set to a long length, and the diameter of them should not be less than 0.3 cm. To strengthen the directivity, filters are used. Front racks may be mounted at an angle of 45 degrees. However, we must calculate the strength of the mast in advance.

To increase the stability of the structure, the base can be made with stops. A VHF antenna is being assembled for the radio with their own hands only with short posts that need to be installed at low altitude. Counterweights can be screwed onto the rack. Thus it is necessary to take care of overlays. Particular attention is paid to lateral surveys, which are fixed on the mast. It is recommended to use racks of 25 cm in length to increase the scattering area.

144 MHz device

A VHF antenna at 144 MHz with its hands is made with a straight or curved stand. The mast in this case is applied with oblique stops. In some cases, pulse reflectors are used. The VHF antenna 144 is assembling with its own hands with side racks. The optimum length of the supports is 15 cm. To increase the gain, the front holders are used. As a rule, they are mounted with overlays. A VHF antenna at 144 MHz with its own hands is made with one or two stops.

Modification to 145 MHz

VHF antenna 145 MHz with their hands is done with a short mast. The most common are the modifications with three racks. The gain in the models is quite high. The rails at the antennas are used with impulse reflectors. Front supports can only be installed with a welding inverter. Models have a high directivity factor. Experts say that antennas are allowed to be made with curved masts.

Model with copper mast

An antenna for the VHF band is folded by hand with reflectors of different frequencies. The front pillars may be installed with or without overlays. Some modifications are made on the side racks. The antennas are manufactured with a high dispersion factor. First of all, the mast is mounted. Counterweights can be mounted at a small angle.

The optimum diameter of the racks is 1.2 cm. It is more advisable to use the mast with a strong base. If we talk about the reflector, then it must be used impulse or wire type. To make a simple model, four counterweights are used. The lining is welded using a welding inverter. Next, to make the device yourself, the partitions are installed under the mast. The intensification of the dispersion area can be achieved with the help of side racks.

Devices with steel mast

On the steel mast, the VHF antenna is manufactured with the help of oblique supports. Counterweights are installed, as a rule, on one side. Some experts recommend the use of short racks with a diameter of 2.2 cm. To strengthen the direction of the device, a pulse reflector is used, which is mounted at the base of the antenna. To connect the model, a conductor from the mast is used. Also worth noting that there are devices with side lobes. They have high conductivity.

Devices for low sensitivity receivers

For receivers of low sensitivity, the VHF antenna is assembled with its own hands quite simply. The first step is to prepare the mast, to which the side racks are attached. Counterweights are often used with oblique guides. The match is established with a solid base. Models of this type should use a wire reflector. Counterweights can be installed in a horizontal position. To strengthen the gain, it is allowed to mount long struts with a diameter of 2.2 cm.

Models for high sensitivity receivers

For these receivers, a 430 MHz VHF antenna is made with a steel mast. Some experts strongly recommend the use of only curved racks. In this case, the counterweights must be fixed at the base of the frame. The usual VHF antenna is made with the help of reflectors of different types.

It is more expedient to start the assembly of the modification with the mast fastened and the wire for connecting. Next, to make a device yourself, you need to cut four racks with a diameter of 2.2 cm. For a 200 MHz model, you need three side racks. Counterweights can be installed at an angle of 45 degrees. The front pillars are mounted at the bottom of the mast.

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