40 m Band Vertical on Steroids

-part 4 Being the last part of about vertical antenna above sea water (see part 2 & part 3), we will discuss 40 m band vertical antenna which configured as 2 x 2 parasitic array. As shown in part 2, a vertical antenna with 2 elevated radials situated above seawater has a peak gain of…

Resizing Your Antenna for Another Band

-part 3- In the previous part, we talked about vertical antenna for 15 m band, while in the first part, we talked about 40 m band. Not so consistent isn’t it ? Well, let’s convert our 15 m band vertical antenna for 40 m band operation. Actually, converting/resizing an antenna for another band is pretty straightforward, especially if…

Overload Your Vertical Antenna

“…It’s a neat trick !…” -Fred Harris- -part 2 In the last article, we’ve seen that under typical ‘newcomer’ installation conditions, vertical antenna potentially perform better than the inverted-Vee antenna. But, there are two weaknesses of the vertical antenna; 1. The vertical antenna needs a very good ground system installation (not trivial) and 2. The vertical antenna that…

Designing a Top-Loaded Vertical Antenna for 80 m Band – Part 1: Radiator

Peringatan :  Proses perancangan dan perhitungan pada tulisan ini menggunakan angka yang diambil dari asumsi penulis. Tujuan dari tulisan ini adalah sebagai perkiraan kasar (“ballpark estimation / quick and dirty calculation”). Angka hasil perhitungan yang sebenarnya sangat bergantung pada kondisi lingkungan dan karakter ground di tempat pemasangan antena. Disclaimer : The design process and calculations…