RE: What Do I have? Airtronics Champion Series Radio Control System
Unfortunately, there is no good news to pass on. Your Airtronics Championship system is completely obsolete and has little value.
It is an AM (Amplitude Modulation) system on 72 MHz (megahertz - frequency), both having been passed up by technology and also
by federal decree. You will not find anyone on that frequency and mode flying at any active model field.
All current 72 MHz equipment being sold is FM (Frequency Modulation) and it is actually being phased out in favor of newer
technology on 2.4 GHz (Gigahertz). Your equipment might be of interest to some collector somewhere, but it is not at all
rare. With luck, you might be offered 20 or so bucks, but then you will probably be asked to pay for shipping.
ME? I am an ex Airtronics technician and customer service person. Wish I had better news. Eloy