We actually use 2 different methods of controlling Freq's, depending upon which field we are flying at.

East field (Private Field, members and guests only) We have a pole made of pvc with a peg mounted in the pvc for each freq. If we want to fly, we go and check the peg to see if it is clear. If it is, then we take our name badge and clip it on the freq.

West Field (City Property But only Club Members and guests can fly) We have a carousal with Freq's Pins. all we do is Take the Freq Pin, place it on our Tx, Take our Name badge and leave it on the carousal. That way if we should forget to return the pin ( or hogs the freq ) the other club members knows who has that pin.

So far these systems have worked very well for our club.

below is a picture of the carousal. The yellow pins have visiting pilots names and the Red pins is the Freq pin for the Transmitters.