The K7ICU repeater system is situated about 500' above metro Tucson, at the base of the Catalina Mountains. It is an open system providing coverage to the greater Tucson area. Backup battery power is provided.

The system uses delayed receive audio, reverse burst CTCSS (Motorola 120 degree phase shift), and a CTCSS-free squelch tail hang timer to keep most receivers free of squelch "crash" noise. CTCSS is not encoded during IDs.

We're now linked full time with KC7CPB/R on 448.000 (-5 MHz offset; 100 Hz CTCSS) in Marana. This extends coverage to new areas of Marana, Avra Valley, and west of the Tucson Mountains.

Predicted Coverage

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A live 24/7 MP3 audio stream is available here.

MP3 audio recordings from the last 10 days are kept in the audio archives.

You may reach a control operator either on the air or by e-mail:

If you'd like to be notified of major system changes or downtime, e-mail k7icu-rptr-announce@k7icu.com to be added to the mailing list. Send the e-mail without modification and your request will be processed automatically.