How To Make Slim Jim Antenna out of copper for 2 meter!
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- Опубліковано 6 сер 2024
- In this video I show how I made a 2m Slim-Jim antenna out of copper. The J-Pole is similar to a J-Pole but with a little higher gain and lower takeoff angle.
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#MNHR - Розваги
Very cool! I'm in the process of making one. I don't plan on broadcasting just listening with my RTL-SDR. I was planning on using an 8 Gauge Solid Copper wire, and 3D Print a Mount for it. Glad you talked about the width of the antenna doesn't really matter, but the length is what matters, because I 3D Printed a part that makes bending the wire much easier. I'm very new to this stuff, so a lot of the stuff you say I don't understand yet, so I'll probably download the transcript of the video, and pass it on to Chatgpt to ELI5 what you said for me lol.
awesome it should work well for you! Thank you for the comment!
Nice job, Chuck. You did a great job putting that together.
good work
i use this antenna to communicate. I installed it 3 years ago. 73
Great video and thank you. If I may respectfully say as someone trying to get into ham radio and has never done any of this before I would have liked to seen how you hook the coax to the antenna. Maybe you have talked about that in a past video and I apologize if you have. Please keep up the great work. I really do appreciate it.
Taz, I used 2 self tapping screws one on each side and the center goes to the closed side and the shield to the side with the gap. I used two crimp on ring connectors that I also soldered. I think you can see that near the end when it is mounted to the PVC mast.
@@KK6USYHamRadioAdventures thank you and I appreciate the help and info
Nice works chucks. Try a ladder line, twin leads, light balanced line for portable works on the higher HF bands for ur portable use, it would be great on a fibreglass telescopic pole. Good low angle vertical radiator. Bye, sly...
Awesome job Chuck 👍
Thanks Ape
If you find yourself making copper pipe antennas often, you might consider replacing the propane tank (blue) with map gas (yellow). It's available at the box stores, and makes pipe soldering quicker due to more heat and more likely to make a complete sealed connection.
OK, that's cool. Thanks for the vid Chuck. I know what I'm going to do this weekend.
It seems to work great!
Chuck,
Another great video. I think I will try and build one of these . Thanks 73 George KB3WAQ
Another comment on you coax connection to th slim jim. The original article by fred judd shows the coax leavingvthe antenna atvright angles to the antenna (i.e.horizontal). You may find this will bring your SWR down even further.
Very nice demonstration. In the UK we are not allowed to have lead based solder so have to use silver based. This has a higher melting point rhan lead and needs more care to avoid overheating the copper. As a comment on your technique, you shouldn't need to put the solder wire all around the heated join. Just touch in one place and it should run completely around the joint by capillary action. In plumbing you often can't reach around the whole joint anyway. Thanks for posting.
Thank You
#MNHR
Awesome job Chuck. Thanks
Chuck well done video . I was once told by a fellow ham the slim jim was better than anything else , well I'm a hard head I wanted to see for myself so put it on my test site to see if in fact it was better than the standard end fed vertical better know as a j-pole, what I found showed it was not better but that being said it is shorter so could be able to keep in tune further across the band known as lower Q but heck the 1/2" copper antenna is already wide and due to the diameter so not an issue but heighth might be for a few hams . My test results showed it to be a compromise from an optimum tuned antenna . Take off angles we're not tested , both were the same height ,transmit and receive antenna . I use an analog tv field strength meter to actually see in microvolts what the test antenna is doing , my test transmitter is the mfj 256 analyzer set to transmit frequency . This test setup gives me a relitive indication of what an antenna is doing so don't have to rely on other stray signals from others or from beacons to see what's happening. We all need to understand what's perfect for one location may not be best for another and we hear a lot of hams saying it the best I've ever had , however we don't know what they had for comparison. If you really want to see what's going on rotate that Omni antenna and take a look at the signal you will be surprised at what you see . I have noticed someone has gotten a patent on an improvement of the common j-pole antenna by adding a choke at the base in the form of a other j section , smart idea of course that's because it's mounted to a metal mast if it was PVC mast that wouldn't be needed but have built several to be tested as soon as harness are made up , also j- pole is a balanced antenna so has to have a choke and I use a coaxial sleeve choke for mine .Keep building antennas and never stop trying to make them better. kc5ulu
And that is how its done!
Yes it is , thanks TO
So if you are not good at soldering pipes..."Don't sweat it!... Much!" LOL
Exactly!!
Thanks Chuck. I was concerned about water in the coax, is it still ok?
I didnt know the slim jim was better than a j pole. 🍻
The slim jim can be better for distance in flatter areas like a vertical to a dipole in takeoff. No problem with the coax, I think I used some liquid tape to seal it.
There is a sleeve that is made to slip over the tubing to make splices that I am going to use for tuning. The coax can be connected to and then moved up or down for tuning then soldered in place. What do you think?
I think that will work also , that's kind of what I did with the copper wire to find out where to attach my coax I just used screws but may change to thru bolts. Thanks for the comment and for watching.
Replay Squad Grea stuff Chuck
Thanks Nytewolf!
I just order 2 of them today from N9TAX.
Nice Ryan, they seem to be a really good antenna!
Not sure about anyone that has TAX in there call! LOL!
Between 2m and 70cm, which would you say is best for use for a HT when in a wooded suburb bordering an urban city center? Local repeaters are plentiful on either band, but which should I go with if tying a roll up j pole up in a tree to TX?
I hear more on 2m where I live but both are busy.
what is pipe size,1/2". de N9TDE
Yes !/2" but any size will work.
I have been considering one also, could it be made with 1/4 inch solid copper line, I get it for 99 cents a foot at my hardware store, it takes bends easily, though I can solder, the joints and pipe are pretty costly. What I am really asking is - is the large diameter of the pipe needed?
Yea it should work fine.
@@KK6USYHamRadioAdventures Thank You
I know I'm late to the party and you probably already built your antenna, but in case anyone else is considering your idea with 1/4 inch solid copper: get a cheap tubing bender from Harbor Freight (or similar) to make the bends, and the finished antenna will look almost store-bought!
I’m not clear what you were doing at 2:10 when you were moving the two twisted wires up and down. How does that tune it, and what do you do with the information? Do you cut the pipe at the point where the wires are in tune? Does something connect to those wires while you are tuning? Sorry if this is obvious I’m just not grasping it. Can someone enlighten me? Thanks, Chuck KE0PTI
After watching a few other videos, I think I’ve got it.
Chuck I was adjusting for best SWR.
Would anybody be able to point me to a DIY link for making a antenna for my PTT.
I have a cheap baofeng and I’m trying to build a antenna for the roof that will reach several miles or so.
PTT or APT this antenna would greatly increase your distance with your HT. I also have another video on a roll up version. ua-cam.com/video/IbV2hdV3f9g/v-deo.html
@@KK6USYHamRadioAdventures thank you sir.
I’m new and only have a million questions lol.
@@jackaltx7928 , Yea I have a buddy that just got his Tech and we have talked for hours lol
@@KK6USYHamRadioAdventures I have several buddy’s that live within 2-5 miles of me and we’re trying to make a SHTF antennas that can reach without using repeater towers. We all have the same PTT radios.
How much piva do you use?
I think one 10" stick will build it.
How many pipes are you in?
1 - 10' stick should work.
From Indonesian
Next time turn off the radio's auto repeater offset. :-) You weren't measuring the SWR where you intended!
Nice works chucks. Try a ladder line, twin leads, light balanced line for portable works on the higher HF bands for ur portable use, it would be great on a fibreglass telescopic pole. Good low angle vertical radiator. Bye, sly...