4m Slim Jim Antenna
- This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m ham radio FM band with a simple adjustment.
Loading Coils for 136 kHz
- This page starts by showing how to make loading coils for LF, and goes on to describe two of the loading coil assemblies used to resonate the experimental vertical antenna used at GW4ALG.