New Helix Antenna Design
- Reflector Loop Dia: 10.66" The reflector is positioned 0.375" ahead of the start point of the first helix turn, first 4 Turns: 10.32", Next 7 Turns: 8.68", Last 12 Turns: 8.40
Hits
post 30 Oct 2026
Helix Antennas Links →

Quadrifilar helix antenna for 137 Mhz

Quadrifilar Helix Antennas QHA

Quadrafilar Helix antenna for 436 Mhz
32

Quadrifilar helix antenna for 137 Mhz
- I had always wanted to try and receive a signal from a satellite using my scanner

Quadrifilar Helix Antennas QHA
- The Quadrifilar Helical Antenna, it ideal for a number of uses. Satellite reception and transmission may be number one among them

Quadrafilar Helix antenna for 436 Mhz
- This is an antenna that I just built. I intend on using for receiving the AO-27 downlink at 436.800 +/- doppler. It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB


