I am a falconer that uses telemetry to track my birds. A friend uses a Yaesu V500 hand held scanner to track with. Our telemetry tag frequency is 173MHZ. I know one of the functions the scanner must have is CW whatever that is. Could anyone tell me if any other hand held scanners would do the same job? Plus where is the best place to look for a cheap second hand scanner to do this job.I have a larger normal telemetry receiver but would like a hand held scanner to carry with me all the time I am flying my birds. Thanks George.