Announcement About Solar Cycle 25

I am not a solar scientist so I will keep it short and not make any scientific comment about it. On the other day, I read an article about solar cycle 25 here, and it appears to be The Solar Cycle 25 has begun. That article briefly talks about the first sunspot and solar flare of…

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…

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…

Exciting Experience of CQ WPX CW 2017

Sebelum melanjutkan kembali seri tulisan mengenai perancangan antena vertikal 80 m band, saya ingin terlebih dahulu berbagi pengalaman mengiktui kontes CQ WPX CW 2017. Alasan saya untuk membagikan pengalaman ini bukanlah karena saya telah mahir Morse/CW, melainkan karena tanpa saya duga, walaupun kondisi propagasi yang tidak begitu baik, saya berhasil mendapatkan raw score yang cukup baik untuk seorang YD/YG (raw…

Running 4NEC2 in Linux Ubuntu

In the antenna modeling activity, I use two software, MMANA-GAL and 4NEC2. I use MMANA-GAL for quick and easy modeling because the interface is very intuitive, while I use 4NEC2 for in-depth modeling because the tool is more complete than MMANA-GAL. One of 4NEC2’s most useful tools is integration with VOACAP so users can see antenna performance under certain…

Running MMANA-GAL in Linux Ubuntu

There are two ways to run MMANA-GAL software on Ubuntu Linux. First, use a Virtual Machine that runs the Windows operating system, and the second is to use windows emulator. For reasons of ease and amount of computation to be run, I chose to use windows emulator that is Wine. I’ve tried installing MMANA-GAL in VMWare running…