Way back in the late 90's I monitored a airphone patch after the Michigan 400 race in Brooklyn had ended.It was between an airplane and a person on a land line phone.
The person talking was Dale Earnhardt still have the audio tape of it.
Don't know if these frequencies are still active but you might want to give them a try.
454.900 Airphone Repeater
454.775 Airphone Repeater
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