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…

Inverted-Vee Versus Vertical Antenna for DX Contact

“…We, engineer, are really easy to believe, just show us the data…” -part 1 When it comes to inexpensive, easy, all around, resonant wire antenna, inverted-Vee configuration become the gold standard for the low-bander amateur radio operator. It provides good gain (we will see that later), good coverage (at least medium distance, up to 5000 km), and the-best-bang-for-your-money.…

New GRC Flowgraph Collection

Saya baru saja membuat laman baru yang menampilkan sedikit “koleksi” flowgraph GRC (GNU Radio / GNU Radio Companion) terkait dengan kegiatan di bidang Software Defined Radio. Pada beberapa post yang akan datang, akan dibahas beberapa flowgraph secara mendetail, stay tuned ! I just created a new page featuring a few “collection” of GRC (GNU Radio…

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…

Grounded Tower As A TX Antenna for 160 m Band

Kira – kira 2 minggu lalu Mr. Igor Khrustalev (VR2ZQZ) kembali mengirim e-mail pada saya, yang kali ini memberi kabar bahwa beliau akan QRV pada CQ WPX CW 2017 bersama YB2TJV (Om Dani) dari Kebumen, Jawa Tengah. Selain kabar tersebut, Mr. Igor kembali meminta saya untuk merancangkan (dan simulasi) antena 160 m band dengan spesifikasi berikut : Radiator…