Cb Antenna homebrew (The gumtree dipole)

1. 

   Bob H says:

   May 15, 2013 at 1:42 AM

   This is awsome…I salute you! An easy and inexpensive antenna to make, and it works great! This is such good info for those of us who like to DIY, and ya learn something about it too. (Now I just need a gumtree…Hi!) A great post, thanks Ed! Hope to talk to you as well on 11m.

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2. 

   Bob H says:

   May 15, 2013 at 1:15 AM

   I wanna make one now!

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3. 

   remingtoncountry1100 says:

   May 15, 2013 at 12:54 AM

   Thanks Bob for the comments. I can mail you come gum tree seeds and in 30 years it should be 50 foot..

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4. 

   Bob H says:

   May 15, 2013 at 12:43 AM

   Cool, and if nuth’n else, it’ll make for some good chewing gum.

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5. 

   Bob H says:

   May 15, 2013 at 12:22 AM

   Dude, check out CB Radio J-Pole Antenna here on youtube! …incredible!

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6. 

   Kevin Vaughn says:

   May 14, 2013 at 11:25 PM

   Brilliant Mate! I am a friend of Bobs, and love the field expedient antenna! Top Marks!

   Cheers,

   Kev

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7. 

   remingtoncountry1100 says:

   May 14, 2013 at 10:57 PM

   Hey Thanks Kev. As you know this would also be the driven element of a really neat broadband hf beam for the 24-29Mhz band. Thanks again.

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8. 

   Bob H says:

   May 14, 2013 at 10:18 PM

   Ya know, after reviewing yer GTA (gum tree antenna), it’s remarkable to see just how wide these things really are! I’m guessing that the SWR’s would only be that much better when the antenna is errected, so as to eleminate any reactance with the ground, as close to it as it is now. You really ought to sell these things! This’ll be my next antenna. 73’s!

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9. 

   remingtoncountry1100 says:

   May 14, 2013 at 9:46 PM

   Hi Bob and thanks for your comment. I still have not installed it yet due to not being able to sling a string over the gum tree. I need to build a sling shot launcher however need to get this checked out by police as sling shots are technically illegal here along with many other articals. I would love to do a follow up video with the areial up and pulling in signals. regards. E

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10. 

    orange70383 says:

    May 14, 2013 at 9:29 PM

    Very nice, and the Trc-449 is a really good unit, fine receive.

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11. 

    remingtoncountry1100 says:

    May 14, 2013 at 8:57 PM

    Thanks, I agree the receive is good on the old radio. 73

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12. 

    TonyG8WBI says:

    May 14, 2013 at 8:25 PM

    Hi. Great simple antenna – I wonder if it would scale up to lower frequency bands?
    One thing about your video I’m not clear on. How do the two ends of the balun connect together?

    Tony G8WBI

    Reply
13. 

    remingtoncountry1100 says:

    May 14, 2013 at 7:42 PM

    Hi Tony and thanks. Yes I have made this antenna from 1.2Ghz to 3.5Mhz You can scale up or down. The math is the same. With the balun A) all three shelds connect together B) two centers go to one side of the dipole and one center goes to the other side. I hope that helps. Also google coax balun calculation. You should find lots of pictures of how it hooks up. Best regards. E

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14. 

    SWIZZRADIOS says:

    May 14, 2013 at 6:49 PM

    Hello dr OM. Is the digital VFO in your TRC449 made by REDCO? It looks like the DIGI SCAN UFO ELITE kit. Thanks…

    Reply
15. 

    remingtoncountry1100 says:

    May 14, 2013 at 6:33 PM

    Hi Swizzradios, yes you are correct. The digiscan has been out of production for some time now. The PCB was duplicated and the components sourced to build this setup. I have lost the positive and negative long ago for the PCB and unsure about parts source anymore. I know a fellow in Australia that is working on a prototype that is better using PIC chips with digital readout with direct frequency input when finished it will be much better than the old DS400 digiscan. Thanks.

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16. 

    SWIZZRADIOS says:

    May 14, 2013 at 6:09 PM

    Hello dr OM, I’m back again. There is an HF-radio Engineer “EPR funkservice” in Graz Austria Europe. This Old Man have some DDS-PLL-, FM-, SSB-modules for sale. Special for old CB-radios: Replacement-modules for uPD858, MB8719, CCI3001, TC9100, PLL02A, etc.- chassis. Please take a look into his technical page: funkservice dot at

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17. 

    remingtoncountry1100 says:

    May 14, 2013 at 6:01 PM

    Hi Swizzradios thanks for the info. Here in Australia HF CB has died off due to the culture of the radio and most have UHF cb or graduated to gentlemans ham radio. The old cb’s were fun in the day and educational for me in the trade school.

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18. 

    remingtoncountry1100 says:

    May 14, 2013 at 5:29 PM

    Actually you are incorrect on both statements. Firstly the terminated folded dipole or DTFD, (see my vid) absorbs upto 1/3 of the rf. This is 33.333R if your maths is bad sonny and the matching balun on folded dipole radiates even less. You must be saying hey but its still a loss. However relative to dB it is under 3dB and that equates to not altering the S meter of the receiving station. I hope you learnt something. If its ok I like to keep all posts regardless of the IQ of the inital post.

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19. 

    CBRADIOLOVER says:

    May 14, 2013 at 5:08 PM

    as ushual some hammy ham like you has to run his know it all mouth, in between tryin to make his car look ‘offishal’ an like a cop car, whacker boy.

    Reply
20. 

    c de says:

    May 14, 2013 at 4:27 PM

    How did you film your video? The camera movement is really smooth and fluid. Did you record it by hand, with a special mount, or did someone else record you?

    Reply
21. 

    remingtoncountry1100 says:

    May 14, 2013 at 4:10 PM

    Hi, I filmed this myself. The camera used was a Samsung ES80 low resolution cheap $80 unit. (nothing special at all) when I uploaded it Youtube automatically detected my shaky recording and offers to “smooth” the video, I selected to accept. You can also do it manually in Youtube video manager and it takes about 20 minutes to do.
    I hope this answers your questions.

    Reply
22. 

    osvaldo rosado says:

    May 14, 2013 at 4:08 PM

    Good video I really like it. The way it is smooth it make it special. Be proud of it and do some more videos please. Good job. If you can do a 5/8cb vertical antenna. That will be a best video whit lots of View and we learn about it.

    Reply
23. 

    remingtoncountry1100 says:

    May 14, 2013 at 3:18 PM

    Hi and thanks for your comments. Yes its an easy antenna, and its easy to use it as a driver element for a wide band beam antenna as well. As for the 5/8 vertical, please check out my mate on you tube bob4analog as he has done a nice little video on the antenna that you could build as well. I hope this helps. Thank you.

    Reply
24. 

    William meizingier says:

    May 14, 2013 at 2:44 PM

    bloody hell! that ready make me feel randy! where did you get such an odd rig??

    Reply
25. 

    remingtoncountry1100 says:

    May 14, 2013 at 1:49 PM

    Hi William, I’m glad you enjoyed the little video and the old TRC449.
    I have had this radio since I was 12 years old and made countless contacts around the world with it, (when conditions were good of course) Thanks for your comment.

    Reply

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