This might be a good time to learn antenna modeling. EZNEC, the very popular antenna-modeling software written by Roy Lewallen, W7EL, is now FREE! The EZNEC website notes:
EZNEC IS NO LONGER FOR SALE. IT IS FREE (see below)
THERE WILL BE NO SUPPORT OR REFUNDS
The introduction of EZNEC Pro/2+ v. 7.0 has been unavoidably delayed. The estimated time of introduction is Jan. 14, 2022, but I’ll do my very best to have it ready before then. It is now undergoing extensive testing and updating of the manual.
EZNEC Pro/2+ v. 7.0 will have all the features of EZNEC Pro/2 v. 6.0, plus extra features including wire loss for individual wires and the ability to run external NEC-4.2 and NEC-5 programs for calculation.
Until EZNEC Pro/2+ v. 7.0 is available, you can download EZNEC Pro/2 v. 6.0 by clicking here:
Roy also notes:
I want to thank the many people who have sent encouraging and complimentary messages about my retirement. I’m very sorry I haven’t been able to respond because my time has been intensely taken up in getting the new EZNEC Pro+ programs ready. I’ll attempt to respond individually after the programs have been released.
Watch this page for the EZNEC Pro/2+ and EZNEC Pro/4+ announcement and other updates!
A fellow on Reddit writes, “For those of you that have never modeled before, I highly recommend reading the four part introduction to antenna modeling written by L. B. Cebik (W4RNL). It appeared in QST a number of years ago and is available on the ARRL web site.
http://www.arrl.org/antenna-modeling.” Also, the help file for EZNEC contains a decent tutorial as well.
I downloaded EZNEC a few days ago and was looking for some good reference material, so thanks for passing along that info from Reddit.
Nice