137 mhz antenna

Quadrafilar Helix Antenna - Quadrafilar Helix antenna for 137 Mhz

137 MHZ QHF Quadrafilar APT Antenna - This version of the 135mHz quadrafilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey's article Taming the QFH which appeared in the March 1997 RIG magazine.

Helix Antenna for 137 MHz - A Quadrifilar Helix Antenna for 137 MHz By George Goodroe, KF4CPJ

Building a Lindenblad Antenna for 137MHz

ATPDEC - Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series. These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz. These transmissions could be easily received with an inexpensive antenna and dedicated receiver. For more information about receiving POES satellite images consult the rig site.