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Aircraft band receiver written by steve hobley

Aircraft Band Receiver Aircraft Band Receiver Written By Steve Hobley TOOLS Small phillips and at bladed screwdriver PARTS Analog AM FM receiver from RadioShack Make sure to get yourself a receiver with an analog dial not an LCD tuning display SUMMARY The FM radio band - MHz lies just below the Civil Aviation Band - MHz which is used for air tra ?c control air shows and other ground-to-air communications This means that it's easy to modify an ordinary analog AM FM radio to receive these transmissions Check out more Weekend Projects ? Make Projects www makeprojects com Page of CAircraft Band Receiver Step ?? Get Yourself an Analog Portable Radio Pick an older style AM FM radio with a traditional tuning dial not one with a synthesized tuner For our project here we're using the venerable RadioShack AM FM Pocket Radio As of the RadioShack Pocket Radio no longer uses analog tuning It has the tradional dial but now uses digital tuning The copper loops referenced in the rest of the project no longer apply Step ?? Remove the Back Panel Remove the screws from the back of your radio and gently pry open the casing Case screws to consumer electronics can frequently be found inside of the battery compartment so make sure to look there if your case isn't coming apart when you think you've removed all of the screws ? Make Projects www makeprojects com Page of CAircraft Band Receiver Step ?? Locate the Coils Step ?? Adjust the coils Identify the three copper-colored coils circled here in red and the two tuning transformers shown in the blue boxes FYI That clear plastic box to the left of the coils is the radio's tuning capacitor Move the dial around on the front of the radio and you'll see its parts move inside the clear case Switch the radio on and set it to FM reception Tune to a station high on the dial as close as you can to MHz Using a at screwdriver slowly expand the coil windings on all three coils You should notice the tuned radio station is moving slowly down the dial This is good as we are expanding the reception range of the radio in the band above MHz ? Make Projects www makeprojects com Page of CAircraft Band Receiver Step ?? Test it Out This document was last generated on - - PM Retune the radio and check that the original station is still available but lower down on the dial In the picture you can see that the station around MHz has now moved down to the location marked MHz on the dial The ?nal step is to turn the radio dial in-between stations so that all you hear is hiss Now adjust the tuning transformers so that this hiss is at the loudest possible level Congratulations The modi ?cations are complete Put the case back on and let's pay a visit to the local airport to try it out