How to build a simple speaker wire antenna for 10m and use it to make a contact with the IC-705
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- เผยแพร่เมื่อ 2 มิ.ย. 2024
- In this short video I demonstrate how easy it is to make a 10m dipole antenna using speaker wire. After building the antenna, I use it to make a QRP contact from my home in Atlanta to a station in Wyoming!
The formula to calculate the dipole length is L (ft) = 468 / f (MHz). My target frequency is 28.380, so 468 / 28.380 = 16.5 ft. Each element is 1/2 of that or just over 8 ft. To allow for fine tuning I recommend adding a little extra, so I used 8’ 8” for each side.
In order to turn the wire into antenna, I used a banana plug adapter with a BNC connection. The IC-705 has a neat SWR function that I used to check the SWR before getting on the air. No tuner needed if you have a resonant antenna like this one.
I found a young ham calling CQ on 10m and answered his call using my IC-705 and new dipole antenna. Did my antenna work? Watch the video and find out!
Watch until the very end for some bloopers including my dog Thor.
73,
Joe KI4ASK
PS - Please like, share, and subscribe.
#hamradio #ic705 #qrp #sota #pota - วิทยาศาสตร์และเทคโนโลยี
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Thank you! I used this video to build a similar antenna. The only thing I changed is I used antenna wire from SOTABeams instead of speaker wire. But putting out 5 Watts on my 705 I was able to QSO with a guy 2,100+ miles away (San Antonio TX to North Cascades WA). Pretty incredible!
That's great Travis. QRP is fun!
Nice simple antenna. Thinking doing same but as vertical on fiberglass pole.
Glad to see this. People make things WAY too hard and WAY too expensive these days. Antennas never need to cost more than a few bucks.
Agreed
WOW!!!!! Always amazes me qrp. I guess I need to try it sometime. Georgia to Wyoming on 5 watts and 59 signal report. Im Impressed.
When 10m is open, it doesn't take much power to work it. A fun band.
great job JOe fantastic video 73 from kb2uew
Nothing better than taking Ham Radio outdoors.
Amen!
This will be the first antenna I build (probably 20 meters) when my 705 arrives tomorrow 😁
Very versatile and inexpensive antenna to build.
3 days ago now... how'd it go?
@@jakep5121 haha, hey Jake, keeping me honest! The radio arrived Tuesday, but I keep forgetting my nights are filled with cooking/cleaning/giving the kids baths/putting them down for bed (18mo and 5 yrs) I ended up loading repeaters and doing some VHF stuff during the week. My plan is to cut the speaker wire tonight and test it out tomorrow!! But weather doesn't look good, no way I risk getting this thing wet. 😆
Very neat stuff..no balun, no complications. I'm not familiar with that radio but assume it has some antenna tuning capability?
No tuner needed for that antenna since I built it to be resonant for 10m.
I've been wanting to build a 10 meter verticle antenna simply so I can connect with a local group that meets every night on 10 meters. My long wire end fed works great for my normal HF'ing but for some reason I can only connect with half of this group. Nobody is all that far away but I just can't hear them. They are all running verticles so your antenna might just be what I need. I'm not ready for the likes of the DX Commander series yet (room wise). Ha. I am totally new to HF.
Isn't this dipole horizontal also? Sounds like you need a vertical wire antenna to match your group's verticals. Lots of them on here to look at... Good luck!
Hi I’m really new to this. I’m curious what you used for your feed line? I’d like to make this but then run the line into the house for winter. Can you do that? And how do you ground? Again super new.
I used a short run of RG58 cable as the feed line. Because I use this as a temporary, portable antenna I did not ground it - I recommend this antenna for portable operations. The banana plug adapter used is not very weather proof.
@@KI4ASK Thank you for the fast response! I’ll keep searching for how to do this as a permanent set up for a ham shack. Thx!
I live in a townhouse with a HOA. Any chance this antenna will work inside?
As the classic saying goes, the SWR is "Close enough for Rock & Roll and Government Work". Dipoles are the best quick antennas. Hope your throw bag didn't get stuck in the tree.
Those arborist throw bags work great and I have yet to get it stuck. Thanks for watching
Did you put anything on the end of your wire to put any cordage to tie it off to like a tree or something
I didn’t but you certainly could. That’s a great idea
Ok thanks ,How much power can you run on this dipole? Or is it limited 5-10 wstts
@@garytedlock7533 Gary, I'm not sure to be honest. I mostly operate QRP and I knew the speaker wire could handle low power. I'm sure you could find an online calculator somewhere to plug in the wire characteristics and figure it out. I would imagine it can handle much more than 10watts since it is speaker wire. I'd estimate at least 50 watts, maybe more.
@jdomaleski Thanks, I'll start out and then go from there.unless I find out different
What size wire did you use? KD9WTH 73
I used 18/2 speaker wire. (18 AWG)
@Joe Domaleski, KI4ASK would 16g be to heavy
@@garytedlock7533 no, that should be fine.
Thanks KD9WTH 73
I tried just that exact thing with copper tubes a half inch in diameter and no luck.
Copper tubes?
Copper pipe??
@@gulfy09 I've never tried to build a dipole antenna with copper pipes. I've seen vertical antennas with copper pipes (specifically J-Pole antennas), but never a horizontal dipole. Assuming the dimensions are similar to what I did with the wire in theory it might work.
Max watts is 5?
Depends on type of wire and gauge. I ran 10 watts through it and it could probably go much higher. Here’s some information - www.elprocus.com/wire-gauge/
@@KI4ASK Thank you! I just saw another version of this same antenna and 100 watts was suggested...
@@K4dsx I personally think the 16 gauge wire I used could handle 100 watts SSB, but have not formally calculated it’s rating
you made that just look way too easy.
but fits into my being found of cheep.
Nit pick , There is no NVIS above 12Mhz.
Thank you. Didn’t know that and looked it up. You’re absolutely correct.
Yea 40/80m is where you want nvis. Great video
Thus is not hamvradio
This is CB RADIO. another poor antenna, another plastic radio and one contact with way excessive power is NOT amateur radio.
Its been done to death.
You're wrong on some many levels. It's the 10m amateur band, not the 11m citizens band. So you're wrong there. It wasn't a poor antenna, it's actually a resonant antenna that worked great. So you're wrong there too. I don't know how much power other station was running, but I was running 10 watts. The IC-705 is a QRP low power radio. So you're wrong there too. K8BYP you're just wrong here my friend. I guess you're just a troll.
Say "I don't know jack about ham radio" without saying "I don't know jack about ham radio." Mission accomplished!
@@KI4ASK Poor guy has been around nuclear radiation too long, let alone HF... Good video, thanks!
Love it 73s {KD4OEL}
Hello Joe thanks for making the video. I enjoyed the video I want to get the materials and make a portable 10m dipole and other bands for my go box. 73 AE4OY WILLIAM PEACOCK 🦚 EM-81UF Blackshear, Ga 😂
Yeah, 10m has been hot the last two weeks