These AM Transmitters operates between 540KHz and 1650KHz in the Medium Waveband (AM Band) and is designed to be reliable and stable.

It is available as a 1-watt output version. It 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, although the power drops off at lower frequencies -see details further down.

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 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.

This model is housed in an ABS box, with the view of keep cost and weight to an absolute minimum.