http://https://youtu.be/Pgn6RQGkcXg
Bob Bruninga, WB4APR will be speaking at HacDC Amateur Radio Club. Bob is the inventor of APRS (Automatic packet reporting system). Visit qrz.com for more information about Bob Bruninga. Contact us at w3hac.hacdc@gmail.com if you would like to join us for dinner @ 6 pm (b4 the meeting).