[TowerTalk] 80m loading coil for 18-HT

[Jim Brown]

On 5/20/2025 11:42 AM, n5xz at earthlink.net wrote:
> I'm looking to installed an 80m loading coil in my 18HT tower

If you can't find one, or info on one, you might want to try sweeping 
the antenna with a complex impedance analyzer (VIA) that can export a 
file to one of the versions of NEC, and design your own. The general 
approach would be to find the suitable inductance, then go to inductor 
design tools to come up with its physical design. SimSmith is also a 
useful tool for designing something like this.

73, Jim K9YC