HamMixer

HamMixer is a complete ham radio station control suite developed by CT7BAC. It includes a Windows desktop client with a dual-source audio mixer, full radio control via CAT, DSP processing, waterfall display, and CW keyer. Combined with the HamMixer Server and Mobile App, it enables secure remote operation of your station from anywhere in the world.

HamMixer currently supports all Icom transceivers using the CI-V protocol, including IC-705, IC-7100, IC-7300, IC-7610, IC-7760, IC-7851, IC-9700, and any other CI-V compatible model. Support for Kenwood, Elecraft, and Yaesu radios is in development and will be released soon.

The free trial lasts 14 days and includes full functionality — no features are locked. No credit card is required. Simply download and install HamMixer to start your trial. After the trial period expires, you'll need to purchase a license to continue using the software.

After the 14-day trial expires, you must purchase a license to continue using HamMixer. The software will prompt you to enter a license key. All your settings and configurations are preserved — just activate your key and you're back in business.

The Desktop license allows activation on 2 machines. The Full Bundle license allows 1 server activation + 2 client activations (3 machines total). This covers typical setups where you have the server at home and use the desktop client from different locations.

We do not offer refunds. The 14-day free trial with full functionality serves as your evaluation period. This gives you ample time to test every feature and ensure HamMixer meets your needs before purchasing.

Yes. The mobile app connects to HamMixer Server running at your home station. The server provides the bridge between your radio and the mobile app over the internet. You'll need the Full Bundle license which includes both the Server and the mobile app (the mobile app itself is free).

Yes, for local operation. Connect your radio directly to your PC via serial/USB and use HamMixer Desktop without any internet connection. Internet is only needed for remote operation, WebSDR audio mixing, and periodic license validation (with a 45-day grace period if offline).

Absolutely. Remote connections use TLS 1.2+ encryption for the control channel and AES-128-CTR encryption for the audio stream. The encryption key is exchanged securely over the TLS channel. Additionally, the server supports IP whitelisting and has built-in brute-force protection.

HamMixer Desktop and Server currently run on Windows 10+ only. The mobile app is available on both Android (Google Play) and iOS (App Store). Linux and macOS versions are under consideration for future releases.

Your license key is delivered automatically via email within seconds of payment. Check your inbox (and spam folder) for an email from HamMixer containing your key and activation instructions. If you don't receive it, contact us at ct7bac@gmail.com.

Yes. Deactivate the license on your old machine (Help > License > Deactivate), then activate it on the new one. The system also automatically tolerates one hardware component change (like replacing a motherboard), so minor upgrades won't require deactivation.

The WebSDR mixer combines live audio from your transceiver with audio from internet-based WebSDR or KiwiSDR receivers. HamMixer automatically synchronizes the two audio streams (compensating for internet delay) so you can hear both sources mixed together in real-time. This is particularly useful for monitoring your own signal or for dual-diversity reception.

Yes, the mobile app is free to download and use. However, it requires HamMixer Server running at your home station to function — the mobile app connects to the server for remote radio control. HamMixer Server is included in the Full Bundle license.

No. The waterfall display requires a radio with a built-in spectrum scope that outputs data over its CAT connection. HamMixer reads this real-time spectrum data directly from the transceiver — it does not use an external SDR dongle or sound card FFT. Compatible models include the Icom IC-7300, IC-7610, IC-7760, IC-7851, IC-9700, and IC-705, all of which stream scope data via the CI-V protocol. Radios without a built-in spectrum scope output will work with every other HamMixer feature, but the waterfall will not be available.

No. HamMixer Server enforces a single-client exclusive lock by design. Only one client — whether the desktop app or the mobile app — can be connected at any given time. This is intentional for two reasons: first, for security, so that only one authenticated operator has control of the radio; and second, to prevent command collisions that would occur if two clients tried to send CAT commands to the same transceiver simultaneously. If a second client attempts to connect while one is already active, the connection will be rejected. To switch clients, simply disconnect the current session first.

Yes! If you have HamMixer Server running at your station, you can let a fellow ham operate your radio remotely. Simply share your server's IP address (or domain name), port, and login credentials with them. They can connect using either the HamMixer desktop client or the mobile app — the same way you would. Just keep in mind that only one client can be connected at a time, so you'll need to take turns. It's a great way to let a friend try a radio they don't own or give someone access to your antennas from a different location.

Your radio is protected. HamMixer Server has multiple safety mechanisms: a heartbeat timeout that releases PTT within 10 seconds if the client stops responding, instant TCP disconnect detection that releases PTT within milliseconds on a clean socket drop, a PTT watchdog timer that automatically stops any transmission after 2 minutes as an ultimate safety net, and an emergency PTT release that both the desktop and mobile clients send as their last action before closing the connection. In the worst case, your radio stops transmitting within 10 seconds.