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SimTX Wiki

SimTX is a shared radio simulation. Set up a virtual transmitter, send audio, and listen with a receiver. No physical radio or antenna is needed. Distance, antennas, and radio conditions affect what listeners hear.

Download SimTX and make your first transmission

The illustrated guide covers installation, account sign-in, server selection, a working example, listening, and saving your settings.

Learn in order

1. Download and transmit: follow one complete example from an empty desktop to your first TX session.
2. Find your way around: identify the controls and understand the meters.
3. Choose what to send: play a file, use a microphone, or send a stream.
4. Change frequency and coverage: choose and adjust an antenna, then learn why reception changes.
5. Add features: install modes, audio processors, tools, and themes without writing code.

The transmitter window. The guide explains each marked area.

Find a specific answer

• Nothing happens or no sound? Use Troubleshooting.
• Which radio mode should I choose? See Modulation Modes.
• How do I save or share my station setup? See Station Configuration and Extension catalog.
• What do SWR, bandwidth, and IQ mean? See Radio terms.
• Looking for formulas or an API? Open the complete documentation index, including antenna calculations and every Lua API reference.

Community and other ways to use SimTX

• Community radio stations: stations described by their operators.
• SDR Console, digital television reception, digital television transmission, How to receive and DRM transmission: additional community guides.
• Download the transmitter · SimTX website · SimTX Discord