It is perhaps not the most exciting of subjects but it is required viewing for anyone with an interest in build their own VHF and UHF antennas.
There are some good nuggets of info in there including how to feed a beam properly and what pitfalls to avoid.
It's interesting to note that GM3SEK does not recommend the use of the Gamma match which is used in a huge number of antenna designs.
Video below...
http://www.ifwtech.co.uk/g3sek/
https://gm3sek.com/
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