I don't make these 7 turn #helix antennas to sell via my website any more (sold around 50 of them through covid), but all the details on how to build them are on my GitHub.
I run each through the #NanoVNA and then take them outside to do the real world testing on 98w.
Each helix gives a solid +20db SNR and off the go to all parts of the world.
#Jaero #SDR #Antenna #satcom #ACARS #airframes #aircraft