Hello group-
About ten yrs ago I read an article about an old beaconing system that small planes used for landing.
The letters "A" and "N" were transmitted at about 5 wpm consistently at a few watts with the transmitter and antenna located near the runway.
Miles from a runway, the pilot (using the plane's rdf antenna?) would hear the letter A ( . _ ) and adjust coarse until it heard the letter N ( _ .) also.
Flying straight at the tx antenna the A and N would "mix" together to produce a single long " __ " and the pilot new he was on coarse.
I copied one of these stns on 28mhz a few times from N.Calif years ago. I think it was from the midwest according to the article. I can't find any info on this.. I believe Youtube had a clip on it at one time too.
Does anyone have info on this old 10m beacon system.
thanks, Eric