Make a gift for yourself! VHF/UHF J-Pole antenna DIY of a ribbon cable.
Тәжірибелік нұсқаулар және стиль
An antenna is the most important part of the Ham Radio station. The more effective HF, VHF or UHF antenna, the longer distance contacts could be achieved.
In this video, I build and test a VHF/UHF antenna for mostly FM communications known as a J-Pole antenna. I was inspired by the article in the QST Magazine February 2003 by Edison Fong, Amateur Radio operator callsign WB6IQN. I adopted this antenna for my needs and frequencies I use most on 2m and 70cm amateur radio bands.
I have also designed few 3-D printed parts for this antenna, which STL files could be available for free at printables.com here:
www.printables.com/model/6917...
Enjoy building and using this antenna!
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73! @Linas_LY2H
Пікірлер: 11
I really like the performance of DeFong antennas. I use mine for several operations including bike events for APRS and coms.
Excellent explanation ! It looks quite complicated but I am sure then end results are good.
I just got some surplus 300 Ohm twinlead (for free!) at a ham swap, and I already have a lot of RG-174. So now I can make several of the Ed Fong DBJ-2's to hand out as gifts to other hams. I'll make some roll-up versions and some 'stick in a plastic tube' type. It's nice to finally be retired. :)
@Linas_LY2H
7 ай бұрын
Excellent Xmas idea! HNY and 73! Linas LY2H
Nice Video! Just an Idea, for another video: Show your Ham Radio Van. I'm very interested to see the interior.
@Linas_LY2H
7 ай бұрын
Thanks! My Radio Van is covered with snow at the moment :) But I will make a tour-de-table video when the weather permits… 73! Merry Xmas! Linas LY2H
Very detailed, thanks for sharing! Davey --KU9L
Profesionaliai.
I have and use a commercially made roll-up J-pole antenna for 2 meters. It works well, and I keep it in my pack for portable use. You have inspired me to make your design mounted in a pipe for use with my van when parked. There is always more satisfaction with something you build yourself. DE WA1KLI
How did you check (step x step) the swr on the 705? Where are you contacts at; how far away where they? I'm inpressed!
@Linas_LY2H
7 күн бұрын
@@99Victor Hello, thanks for watching! The IC-705 provides for a plot-SWR measurement, i.e. you can analyse the antenna SWR response over the entire range of set frequencies, so I used this great feature. All the detailed steps on how to use this feature are very well desribed in the Advanced User Manual, chapter 9.4 , I wouldn't do it better :) This antenna is a FM VHF /UHF workhorse, working equally nice as portable and as a fixed antenna. It performs better, in my opinion, than a 1/4 wl ground plane vertical, but surely not better than, for instance, a colinear array of multiple vertical dipoles :). As it comes to the contacts, I easily take part in local 2m/70cm nets, open local digital repeaters , all the daily routine on the FM mode may demand. In case I take part in some dx activities in CW or SSB modes, like contests or activity days, I mostly use my horizontal polarization stacked 2x9EL Yagies. But I also always have my J-pole with me for local FM communications. HTH, 73! Linas LY2H