NMO34 vs NMO40 for low band 39.4MHz RX only.
Both antennas are cut to the same frequency. The NMO34 was being used because at the same "tune" for 39.4MHz it is significantly shorter on top of a large SUV.
Some at home testing on a desk no groundplane, the longer whip on the NMO40 produces improved bars and RSSI on RX.
Can someone explain how the groundplane and the base coil work on these low band antennas, and if the tuning is mostly for TX SWR.
How can I at home tune or optimize an antenna on a desk no groundplane on a mag mount to account for such?
Wondering at what point a tuned "antenna" becomes basically a dummy load lol.
Paul
Both antennas are cut to the same frequency. The NMO34 was being used because at the same "tune" for 39.4MHz it is significantly shorter on top of a large SUV.
Some at home testing on a desk no groundplane, the longer whip on the NMO40 produces improved bars and RSSI on RX.
Can someone explain how the groundplane and the base coil work on these low band antennas, and if the tuning is mostly for TX SWR.
How can I at home tune or optimize an antenna on a desk no groundplane on a mag mount to account for such?
Wondering at what point a tuned "antenna" becomes basically a dummy load lol.
Paul
