Walkie-talkie
Under walkie-talkie, handheld radio (usually with HFuG abbreviated ) or walkie- talkie understands radio devices that are equipped with a self-contained power supply and thereby constructed so that they can be transported by one person and operated in the hand. In amateur radio and professional radio services, they are the antithesis to the station radios that as a vehicle radio stations (see mobile device), land stations and relay stations are used. With the exception of the CB radio - - In addition, almost all wireless devices in the area of so-called everyman radio are usually also of pivotal legal reasons run as portable radios.
- 2.1 Field of application
BOS Walkie Talkies
The authorities and organizations with security tasks diverse Walkie talkies are used. This in particular allow for the use of radio sites and also requires the vehicle and the control center radio.
Area of application
In the area of public authorities and organizations with security tasks it is ( there usually in the 2 meter band ) mainly used by police patrol car and the fire brigade or the ambulance service ( at the 4- meter band ) when the work site further from the vehicle is removed or more units must be coordinated on site or a squad leader with the help of a control center.
Are used, the 2 -m hand-held radios (HFG ) for communication at the site, which means in a limited space. For communication with the control center 4- m tapes are used. The existing HFG be distributed in key positions such as fire: HFG when using a ladder, a HFG in the attack squad, a machinist at the HFG or respiratory protection monitoring, depending on the available and used Location: more troops. For other types of applications ( eg flood ) HFG be distributed to the various job sites.
The FuG 10 is a radio for the 2 m band, with ten programmed (or bequarzten ) channels. It is usually suitable only for the intercom mode (only from Bosch FuG 10 were also used for intercom and for mixed use suitable variants available ) and has 1 Watt transmit power. For the FuG10 there is a 40 cm long ( quarter-wave length) rod antenna and a 15 cm long inductive condensed by coiling the antenna. However, the latter has significantly poorer than the rod antenna radiation characteristics, but on the other hand is more manageable. The operating time is four hours.
The FuG 10a is a multi-channel radio for 92 channels in the 2- m range. On channels which, although adjustable, but locked, an acoustic warning signal is given. Both the band ply and the type of traffic can be switched. Are possible intercom and intercom related traffic. The radio has a transmit power of 1 watt and a service life of at least 4.5 hours.
The FuG 10b corresponds to the FuG10a but can also be operated at a higher power level and be equipped with FMS or other additional functions.
The FuG 11b is since 1994 a new generation of handheld radios for the 2 m band. As a multi-channel device all 117 channels of the 2 -m range can be switched in both upper as well as lower band. It can be operated alternately and in the conditional intercom traffic. By appropriate programming, the number of switchable channels can also be limited to a certain range. The unit has an output power of 1 watt and no fixed user interface more. Therefore, there are numerous, very different models of the FuG 11b, which are served completely different.
The FuG 13 has 10 programmed channels for the 4- m range and a transmit power of 1 watt. It is suitable for intercom and intercom related traffic and was mainly used for special purposes. Its construction is adapted to the FuG10.
The FuG 13a is a multi-channel 4-meter radio. For a transmit power of 1 watt it can be used both in the basement, as well as the upper band in the intercom and intercom related traffic. It is the FuG 10a adapted largely externally. In some states, the ownership and operation of the 4-meter handheld radios is the town or local fire chief and county fire inspectors reserved.
The FuG 13b corresponds to the FuG 13a but can also be operated at a higher power level and be equipped with alarms, FMS or other additional functions.
Digital radios
The BOS will be well used in Germany in the future digital radios such as TETRA, which much more complicated than above by the operator produces devices, but there are also more versatile.
Ham Radio Walkie Talkies
In amateur radio service many different handheld radios are used. Hand-held radios can usually on the 2- m and / or 70 -centimeter band, rarely work well in 23 -cm, 6-meter or 10 - meter band. Typically, the devices have to send only available through (narrow-band ) frequency modulation ( 10-meter devices often also on single-sideband modulation. ) For the reception often contains amplitude modulation and wideband frequency modulation ( radio reception ) are available. Common hand radios are standard and suitable for the use of repeaters. The operation is also possible via EchoLink, if a DTMF encoder is installed. There are also devices available that are equipped with an additional module for digital signal transmission according to the D- STAR standard.
Area of application
Hand-held radios are not only used on the bike, on field days or on walks, but also in the car or at the location of the registered Amateur radio station. Amateur radio equipment is rarely used even in bad radio units on BOS frequencies, although they do not have authorization for this radio service. Here use is made of, that the frequency ranges of modern hand-held radios can be extended. So the radios are not just for radio abroad ( there are more amateur bands available ) prepared, but also for emergency radio.