Shortwave radio. Grundig, Roberts Radio, Philips and Sony Shortwave Radios Entry level short wave radios under £100 for mail order anywhere

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AM Used to describe the Medium, Long and Short wave bands
Bandwidth control Bandwidth control on a short-wave radio receiver allows you to control the selectivity of the receiver so that interference can be reduced considerably.
EON-traffic system By utilising the RDS service "Enhanced Other Network"  (EON) Listen to an RDS programme without missing news even from other networks.
FM Used to describe the VHF wave band
Ionosphere shortwave travel around the earth by bouncing between the earth and the ionosphere (The part of the earth's atmosphere that reflects shortwave back to the earth)
LCD (Liquid Crystal Display) all of our digital radio's  have LCD displays
Local DX Switch DX stands for distance. This   switch adjusts the sensitivity  of  the radio to improve  reception   of  distant  stations or  prevent  over loading of the radio by a very strong local transmitter.
Notch Filter A notch filter removes a very narrow slice from a received signal. either from the radio frequency itself (RF notch) or from the audio output (audio notch) of the receiver
Narrow, Wide With so many stations broadcast on adjacent frequencies, its is possible to adjust the signal bandwidth and sharpen the tuning to reduce unwanted noise
Pre-sets This allows you to programme your favourite stations on you radio
PLL (Phase Lock Loop) an Electronic circuit in  digital radios that locks onto your chosen station to give clear drift free reception.
RDS (Radio Data System) The LCD display on the radio will display the radio  station  name  and  depending on the model of radio, some program information as well
RF Gain A Control that permits the sensitivity of the reciver to be continuously  varied
SSB (Single Sideband) Only essential if you want to listen to ham radio and  utility  stations. Single side band operation makes it possible to concentrate the full transmission energywith suppressed carrier noise
Scanning This feature allows the receiver to   automatically  tune  through a desired frequency range, stopping on all frequencies where a signal is present.
Selectivity The ability of the receiver to select the station it is tuned to, from all the others close to it on the dial/display.
Sensitivity The ability of a shortwave radio to repond to weak signals. It is measured in microvolts. The lower the measurement in microvolts, the fainter the signal the radio can receive.
Squelch This  quiets  the   receiver  audio  until  the  strength of  the signal exceeds a desired level.
Synchronous detection This feature is found on the Sony  SW7600  SW100E and Grundig Satellite 800. It is a circuit that replaces the carrier in a received AM signal with with an internally generated replacement to reduce the effects of fading.
Varible Bandwidth Tuning This is a circuit that allows the selectivity of a receiver to be continuously varied.
World Band Another name for short wave

Bd14580_.gif (185 bytes) What is Shortwave   Bd14580_.gif (185 bytes) Choosing A Shortwave Radio  Bd14580_.gif (185 bytes) Radio Glossary

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