How to improve the radio reception

How to improve the radio reception – Problems that arise when working radio. Ways to address them . Tips on making antennas for radios.

Simple listeners and radio amateurs often faced with several problems: noise and inaccurate reception. And with one, and the other can be controlled . Here only at different wavelengths are applied in different ways.

To solve the problems, you will need: enameled wire (diameter 0.3-0.5 mm) aluminum or copper wire (diameter 5.3 mm ) , wood or cardboard . On all bands to radio operates one rule : you have to receiver antenna as high as possible above ground level.

If an antenna is not present, it must be manufactured. Uninsulated long aluminum or copper wire may serve as an antenna for LW , SW and NE . The length of this antenna can reach about 40 m.

 

You should not have problems with the connection of the antenna if the receiver has the antenna jack . If not, then you need to make a frame or box out of scrap materials ( wood or cardboard ) to which you want to place the receiver .

Wrap a box of about 10 turns of enameled wire . Ground one end ( for example, a central heating radiator ), and the other end to connect to the antenna. In this case , a box with an internal antenna provides inductive coupling . Pick empirically position of the receiver relative to the box.

On VHF is also possible to use an external antenna , which is suitable as a TV aerial ” Wave channel .” Previously, these antennas are used for collective TV reception . Sometimes they are now found on the roofs of houses .

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Connected with such an antenna using a coaxial cable, the antenna should be sent to the transmitting stations . Under any circumstances, even the most powerful FM station reception area sure does not exceed 50 km .

There are three ways to combat noise. The first method – a directional antenna . The method is applicable for all bands . In receivers with ferrite antenna for medium and long waves , finding the best reception with the least amount of interference can be achieved by turning the receiver itself or loop antenna .

To combat the noise in the middle and short wavelengths require a loop antenna , which is a square wooden box or a rhombic shape with a side length – 50 cm

Wrap on the frame about 10 turns of copper enameled wire ( diameter 0.3-0.5 mm). This frame is included in the aerial socket on the receiver and the land , or if only one antenna socket, and a second outlet connected to the frame metal chassis of the receiver or grounded. Next you need to set up a radio station by turning the knob and tune out noise.

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Also allowed the use of the outer ” anti-noise ” antenna. It is a concentrated capacity , which is connected to the vertical wire ( decrease) , leading to the aerial socket on the receiver.

As lumped capacitance may use a metal rim of a spoked bicycle wheel hub and which is fixed to an isolated mast vertical . The signal quality is determined by the relative interference signal to noise ratio . The more powerful is the received signal , the easier it will tune out the noise , just turn down the volume .

As a rule, directional antenna for VHF looks like TV . Try to tune out noise in the receiver , narrowing the bandwidth. Some receivers provide for the availability of special switch. This method is suitable for radio and is not suitable for the reception of artistic programs .