I’ve recently built all three “beginners” antennas but I’m getting really poor performance from all of them. My reference antenna is just a cutoff whip from the nooelec bundle.
I’m getting about 1/3 of msg/s and about half of distance on any DIY antenna compared to the whip.
I’ve rebuilt the spider twice, used brand new coax, checked continuity and resistance using multimeter on all legs etc…
For SO239 spider, I’m using a short (20cm) UHF to male SMA adapter, for quick coax spider and cantenna, I’m using short RG6 with F connectors and F to SMA barrel adapter.
What I’m doing wrong? What else I can check/improve?
Example polar plots for quick coax spider and the whip: