Homebrew Wire Antennas for Portable Ops

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K0PIR

I'm an Amateur Radio enthusiast. I love the hobby and experimenting with radios, antennas and software. On my YouTube channel I upload videos on the Icom 7300 and Icom 7610 along with Ham radio software programs. I hope to inspire people to try new things in Amateur Radio.

10 Responses

  1. blank Bo Barry says:

    I didn’t have good results with a 9:1. Found the 49:1 EFHW and won’t turn back. Granted 80m version not practical for portable. 73 Bo W4GHV since ’54

  2. blank Cesar says:

    Hi. I do also use a long wire for home shack operation. Tha main issues I faced with long wire was they demand a tuner to low SWR. So I decided to order commercial LW from abroad. The HyEndFed Dutch company sent me a couple of antennas that have been installed and worked very good so far.

  3. blank K0PIR says:

    Hi Bo, thank you for commenting and excellent information! I used a 64:1 at one point and it worked very well. It wasn’t adjustable but I still have it. Haven’t tried to 49:1 and I will give that a try. Take care and best 73!

  4. blank Tom Small says:

    I truly enjoyed your email – When I travel with the RV I depend on my “loop” antenna / and 7300. Works great and easy to set up …

  5. blank John Stumm says:

    Rich, Good stuff! I really like the launcher you employ. The pneumatic one I made is cumbersome. Good numbers on the 64:1. Looking forward to see what the 9:1 yields. I’ve been playing around with my 1:30 variable Might Might unun. I’m getting very good readings on 40/20/15/10 meters with the single 64 footer. Only problem is limited power handling. Look for a new double core listing! 73 John

  6. blank K0PIR says:

    Hi John,

    It’s nice to hear from you and thank you for posting here. One 9:1 I have will handle approximately 200 watts. Since I’ve been using it for portable operation I haven’t had to worry about more power than that.

    Glad to hear it’s working for you and the 9:1 I have works great too.

    I hope to hear you on the air. Best 73 and good DX!

    Rich, K0PIR

  7. I wonder how you came up with 64 feet for a random wire. Having read a lot (four articles including the one you cited). American authors seem to lean toward 58-59 feet, while VK6YSF does come up with 64, more or less. But the one I see most often is 71-72 feet (Balun Designs, Markowski (udel) and VK6YSF. That’s what I will try soon, with my 7300 and a 9:1 Unun from Nelson Antennas. We shall see. I’m still in learning mode, new ham in March. All the authors seem to gloss over whether they calculate bare or insulated wire.

  8. blank K0PIR says:

    Hi George,

    That’s a question another asked. On my webpage it lists a link to the favorite lengths. 64′ is not in it, ha!

    That is the length the maker of that particular coil suggested to try and by gosh it worked perfectly. Go with what you have and see. Let me know.

    Thanks and take care, 73!

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