My Ham Radio Repeater Design (Main Controller) 

I wanted to design a repeater controller which would have Echolink, Crossband and Auxiliary functions all in one unit. This design incorporates a 440MHZ full duplex repeater, 2 Meter link, Echolink and HF radio link. All can be accessed from the 440 repeater via DTMF. The total project took about a year to complete including some special functions I developed on plug in sub assemblies.

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