Radios are often equipped with sockets marked with a letter A or a sign similar to the letter Y but with an additional third vertical line in the middle. It is into this socket and connect the antenna. If it is external, it must be supplied with a thunderswitch and ground before the thunderstorm.
Some receivers have nests for grounding as well. Such devices cannot be connected to receivers powered by a network without a transformer. Their rear walls bear the inscription “Earth not to include”. If the receiver does not have a socket for an antenna, but there is a telescopic antenna, it can be connected to it by clamp a “crocodile” room antenna – an isolated wire several meters long. The reception will get better.
To improve reception at low frequency ranges, it is possible to wind several turns of wire directly onto the housing of a small receiver such so that the axis of the resulting coil is parallel to the axis of the magnetic antenna. One of the coil findings connect to a similar room antenna.
TVs used to have clamps for a flat 300-room antenna cable. All TVs now supply coaxial jacks to connect the 75-room cable. To connect this cable to the machine, use a standard antenna plug. Room antennas with 300-ohm flat cable are available so far. Their kit includes an adapter with a matching transformer. The plug built into the adapter can be incorporated into the coaxial socket.
Modern TV has one socket for a broadband antenna running across all ranges. The old TV can have separate nests for meter and decimeter antennas, as well as an additional socket with 10 voltage divider, which is advisable for strong signal. The antenna socket can be fitted with the inscription Antenna In, Aerial or similar, or stylized letter T, however consisting of two letters G – mirror and plain.
Music centers are equipped with nests for looping antenna of low frequency bands and antenna dipole of high frequency bands. If the first antenna is lost, wind ten turns of insulated wire on a 10-centimeter diameter frame and connect to the appropriate nests. If there is no second antenna, take a TV room antenna with a 300-ohm flat cable, remove the transformer adapter from it and connect to the music center nests designed for dipoles. Denote clips for antennas with Antenna, Aerial, AM loop (for loop antenna), FM dipole (for dipole), etc.
Many cell phones have small coaxial nests for the outer antenna. If there is no such socket right on the back wall, it may be under the cover of the battery compartment, and there may not be holes in the lid. But then you can use the external antenna only when the lid is removed, which is uncomfortable – the battery can fall out.
Plug and disconnect the antenna you need very carefully, so as not to spoil the miniature socket. The plug must necessarily be factory-made designed for use with cell phones. There are usually no inscriptions near the antenna socket. It is cylindrical, has a diameter of several millimeters and is gilded. Sometimes it’s not at all, even under the lid.
To C-B (27 MHz) radios, external antennas are connected not by 75-, but by 50-ohm coaxial cable. The antenna socket and the plug of the BNC standard have a design that eliminates drop-out due to the application of the latch. It is not possible to turn the radio on transmission without an antenna – the transmitter amplifier may deteriorate. The same can happen from using an unsuitable antenna, as well as a 75-room cable instead of a 50-room and even just when scrapping in the cable. At the portable walkie-talkie, the antenna socket is located on top, at stationary or automotive – on the back wall.
Satellite dishes connect to receivers not directly, but through converters fortified directly on the “Plates”. Special sockets, plugs and cables with low attenuation at significant frequencies are used for this purpose. The same cable is supplied power and control voltages to the converter. The connector socket is located on the back wall of the receiver.