Comments on: Radio Hacking Made Easy: the Aircraft Band Receiver http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/ DIY projects, how-tos, and inspiration from geeks, makers, and hackers Tue, 21 May 2013 13:51:06 +0000 hourly 1 http://wordpress.com/ By: cnd http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-910221 Sun, 03 Mar 2013 02:42:56 +0000 http://blog.makezine.com/?p=109352#comment-910221 I did the Mars/Cap mod to my Yaesu VX7r, which allows me to transmit on air-band (I’m a pilot), before I realized that the vx7r modulates that in FM. For those who are interested, my AM airband transceiver *can* hear and understand my FM transmissions, albeit only in a very reduced range, and it comes out very quiet. The vx7r receives in AM on that band (even though it xmits in FM), so I wasn’t able to check if an FM receiver can hear AM modulated signals, but at least now you know that the other way around kind-of does work, *just*.

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222254 Thu, 08 Sep 2011 15:29:00 +0000 http://blog.makezine.com/?p=109352#comment-222254 Of course that’s not true. And in fact in countries like England, post-9/11, Airplane Spotters are relied upon to report suspicious activities of aircraft. And spotters have also been responsible for bringing awareness of “extraordinary rendition” to the press in various countries.

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222253 Thu, 08 Sep 2011 15:16:00 +0000 http://blog.makezine.com/?p=109352#comment-222253 standing in front of an airport with a video camera and a device that has an antenna.

man you are brave.  I hear the TSA shoots people on site for stuff like that.

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222252 Thu, 08 Sep 2011 12:02:00 +0000 http://blog.makezine.com/?p=109352#comment-222252 Your point is correct. It actually should work tho: older super-simple transistor FM-band bugs were actually AM-modulated with some tradeof with espect to quality and bandwidth. Only with varicap diodes those bugs became really Freq Modulated.

]]> By: Peter Simpson http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222251 Thu, 08 Sep 2011 11:47:00 +0000 http://blog.makezine.com/?p=109352#comment-222251 AM is fairly easy to demodulate, easier than FM.  Assuming the cheap transistor radio is using something like slope detection for the FM, it would demodulate AM as well…except it would be noisy, because the FM signal is much wider (200 KHz vs 20 KHz) than an AM signal.

All you really need to demodulate AM is a tuner, a diode and an amplifier. This type of receiver has the advantage of not using a local oscillator (LO), which could interfere with aircraft systems. There are several designs along these lines: http://www.techlib.com/electronics/aircraft.htm

//de KA1AXY

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222249 Thu, 08 Sep 2011 02:19:00 +0000 http://blog.makezine.com/?p=109352#comment-222249 Great! Take a picture and send it to us, and let me know what chatter you hear!

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222250 Thu, 08 Sep 2011 02:19:00 +0000 http://blog.makezine.com/?p=109352#comment-222250 Great! Take a picture and send it to us, and let me know what chatter you hear!

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222248 Thu, 08 Sep 2011 02:16:00 +0000 http://blog.makezine.com/?p=109352#comment-222248 thanks for the update Roy! I was already researching the phenomenon before your comment, but that’s a good forum you found there.

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222246 Thu, 08 Sep 2011 01:30:00 +0000 http://blog.makezine.com/?p=109352#comment-222246 Damn, I just can not get away from REO Speedwagon.

]]> By: Anonymous http://blog.makezine.com/2011/09/07/radio-hacking-made-easy-the-aircraft-band-receiver/#comment-222247 Thu, 08 Sep 2011 01:30:00 +0000 http://blog.makezine.com/?p=109352#comment-222247 Damn, I just can not get away from REO Speedwagon.

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