These AM Transmitters operates between 540KHz and 1800KHz in the Medium Waveband (AM Band) and is a reliable and stable design. 

Two units are available in 1 watt and a 4 watt output version. The 1-watt version is capable of delivering over 1 watt of RMS power into a short length aerial. It can usually deliver 1.5 watts cleanly driven to 100% modulation. The 4 watt version can deliver in excess of the specified output. (Power drops off at lower frequencies -see spec below for details on the other versions)

The Transmitter circuit design employs a CMOS Phase Locked Loop oscillator circuit for accuracy and ease of frequency selection.  A binary code is created by the 8 position DIP switch. It is also very stable and therefore does not drift off frequency. The Phase Lock circuit provides selection in either 9KHz steps for UK/European Union or 10KHz steps for USA. A suitable Crystal is used for either selection and is selected at time of ordering. A rugged Power MOSFET is also used on the RF output stage, which drives the output toroid and variable tuning capacitor. High voltage rated components are used in the output section.

Audio modulation is series-derived using a pair of Darlington Power Transistors. These are in turn driven by an audio level control chip which allows the transmitter to achieve maximum modulation at all times, whatever the audio source and nominal level is, within reason. (CD player, mixer, PC etc)

It also acts as an audio expander, so low audio levels are increased.

Housed in a Steel box with ABS front and rear panels. Ventilation holes to improve air flow for component cooling. A fan is used on the higher 4 watt output models.  

This EBAY sale is for the ONE WATT unit.

For further information please visit   sjvbroadcastservices.com