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A quick, simple and inexpensive FM radio station for beginners or anyone else

Lights out! Guerrilla Radio! Low power radio, that is.
     If you would like to take the plunge and start making radio in a quick and easy, one afternoon project that keeps the spend under $30, you might like the Guerrilla radio project.
     In this case, Guerrilla means small, easily built, quick to set up and fun.
     Set up a civil defense transmitter (my current effort), promote a garage sale, relay NOAA weather radio on a more convenient frequency or play the hits your garage band created.
     Your adventure begins with the famous Scosche FMT4, a legendary and happily hackable little FM stereo transmitter with a delightful feature. More about that in a minute.
     The transmitter runs about $19.00 but is often on sale for as little as $12.00. Find the Scosche FMT4 on amazon here:
     Next, add an economy MP3 player with a few GB of storage, like this 8GB player from Amazon for less than $10.00
     Then, choose your transmitting frequency - low (88 and 90 MHz) frequency range or high (106 and 107 MHz) frequency range.
     Finally, cut a piece of small diameter wire for an external antenna - 6' 6" long for the low (88 and 90 MHz) range and 5' 6" long for the the high range (106 and 107 MHz) - this approximates a 5/8ths wave vertical radiator and will help us get the full range possible from the transmitter.
     Strip off about 1/4" of insulation from the wire and open the battery door on the back of the transmitter.
     Slide the wire through the relief slot on the battery door and tuck the striped end between the negative terminal on one of the batteries and the spring terminal on the transmitter battery holder.
     There are two negative terminals because there are two batteries wired in series.
     Choose the negative terminal closest to the input cable, as shown. Plug the input cable from the Scosche FMT4 into your MP3 player, power up the transmitter, turn on the MP3 player, press play and tune your frequency - you just made radio!     
     Some might say that adding a radiator to this certified transmitter would void the certification and that would be correct.
     It's important to remember that it's still permissible to use a transmitter that has lost certification, just not permitted to sell transmitters not certified by the FCC.
     As an experimenter or recreational broadcaster, we can modify transmitters and stay within Part 15 limitations.
     We can also be comforted by the fact that this transmitter runs on two AAA batteries so it's pretty easy to stay under 250 uV/M at 3 meters when we're not starting with very many uV to begin with!
     To be sure you're compliant, shorten the antenna until your range is 200 feet or less, the generally accepted outcome for a fully compliant transmitter, certified for sale or otherwise.
     A radius of 200 feet makes a pretty big circle, so just put your transmitter in the middle of a crowd and tell everyone where to tune on the FM dial.
     Please also to be enjoying our two earlier posts on the Scosche FMT4, Meet the Freedom Stik, the Scosche FMT4 and the follow up post Scosche FMT4 transmitter update.
     Lot's of fun radio adventures await, so grab a Scosche FMT4, plug it into your favorite audio source and make radio! 

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