DK7ZB Dual Band Yagi Antenna Build and Testing

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  • Опубликовано: 29 янв 2025

Комментарии • 50

  • @Welshwizzard1
    @Welshwizzard1 Год назад +2

    I built four of the 16 ele versions for 432mhz, these got me working off the moon after also building a solid state rf amp for 70cm,

    • @dxexplorer
      @dxexplorer  Год назад

      Woaaaaaa. Now you give me ideas 😁. Is on my list since I was a kid and I was reading in books about EME. Maybe this coming summer I get to try this too. Good reminder, thank you. 73, YO6DXE

    • @Welshwizzard1
      @Welshwizzard1 Год назад

      Check out the antennas by DG7YBN. These were the version I adjusted for 70cm EME working.

  • @giovannifumatorre2140
    @giovannifumatorre2140 10 месяцев назад +1

    Greetings from Romania!!!73 from Deva.

    • @dxexplorer
      @dxexplorer  10 месяцев назад +1

      Ohooo... greetings from Romania as well... today from Sibiu... on my way home in Brasov tomorrow. 73, YO6DXE.

  • @Istoryahetvvlogs
    @Istoryahetvvlogs 2 года назад +3

    Great antenna designed.. good job and 73 (DW6WPO)

    • @dxexplorer
      @dxexplorer  2 года назад

      A very well though design. I am really happy I found it. It works like a charm. Thank you and 73 DE YO6DXE.

  • @azarellediaz4892
    @azarellediaz4892 3 месяца назад +1

    Did you ever get around to making the blog post for this antenna? You never provided the link to where you got your data to build it.

    • @dxexplorer
      @dxexplorer  3 месяца назад +1

      Almost yes. I have half of it written and I was working on the drawings and details. I will finish it once I get home as I will also make a new video as well since I am planning to build one more that weights less.

  • @multilecful
    @multilecful 2 года назад +2

    Should have a good bandwidth Ciprian. Good build. Looks as strong as a Tonna.
    There is no real worry about mounting arrangements , you have many mounting options.

    • @dxexplorer
      @dxexplorer  2 года назад

      Thanks Nigel. Indeed it really has a nice bandwidth. Way better than I was expecting if I would compare the SWR sweep to the graphics that were available in the article. Really happy about the way it turned out. Solid... ohh yes ))) We chat more tomorrow. Time to put the nephew to sleep hahaha. 73

  • @johnemmons9087
    @johnemmons9087 Год назад +1

    Hi. Looked on your blog for dimensions but couldn’t find any.
    Thank you!

    • @dxexplorer
      @dxexplorer  Год назад +1

      I didn't had the chance to write the article... but here is where I found it:
      www.qsl.net/dk7zb/Duoband/4+5_2m-70cm.htm
      73, YO6DXE

    • @johnemmons9087
      @johnemmons9087 Год назад +1

      @@dxexplorer sure! I understand! God Bless and thank you!

    • @dxexplorer
      @dxexplorer  Год назад

      @johnemmons9087 Always a pleasure. I hope to slowly catch up and write all the articles for the videos I posted so far.

  • @wancable9702
    @wancable9702 2 года назад +1

    thank you bro, this video really inspired me.. i love to homebrew, but no luck with gamma match..

    • @dxexplorer
      @dxexplorer  2 года назад +1

      This one had no Gama match and the SWR is amazing for both bands if the dimensions are as in the instructions.
      www.qsl.net/dk7zb/Duoband/4+5_2m-70cm.htm

    • @wancable9702
      @wancable9702 Год назад +1

      I've just been working for this, using what ever left.. a little adjustment... its working well.. get fun with amsat.. thanks.

    • @dxexplorer
      @dxexplorer  Год назад +1

      That is great to hear. I want to use the one in the video at home... and build one more ( a light version ) for portable work. Have fun with the sattelites 😀😀 73.

  • @joselobo8731
    @joselobo8731 Год назад +1

    Hi, please take me two doubts 😃: regarding the coil, please tell me the correct diameter and number of turns. I read 25mm and 5 turns. Is correct? The other doubt is the connection between elements and boom. Can the elements be in contact with boom (even with only one screw) or totally isolated. Thank you and really liked your video. Simple and efective. 73's

    • @dxexplorer
      @dxexplorer  Год назад +1

      Hi Jose... yes the diameter of the coil is 25mm and 5 turns. And yes is ok if the elements are in contact with the boom. I was also confused on the same thing when I built it jajaja. 73

    • @joselobo8731
      @joselobo8731 Год назад +1

      @@dxexplorer Thank you very much for your answer. Glad i was not the only with that doubt 😄. Seen dozens of photos and videos but there were the two versions. I am going to make my elements suport in 3d If you want i can send you the stl's for printing. 73's from CT1BRN.

    • @dxexplorer
      @dxexplorer  Год назад

      @@joselobo8731 Thank you as well. I don't have a printer... but some plexiglass and a little patience got me some nice raisers haha. Just make sure that you keep the proper distance between the driven elements... the 1cm if I remember well. And it has to be 12mm in diameter. Is a must )). 73

    • @joselobo8731
      @joselobo8731 Год назад +1

      @@dxexplorer ok, thanks. Bought the tubes today. Had to go another shop to buy the 12mm but it´s here. 73's

    • @dxexplorer
      @dxexplorer  Год назад

      I have to buy the 12mm tubes as well as I messed up as explained in the video and want to replace them to the proper length. Good luck building yours. 73, YO6DXE.

  • @skr4021
    @skr4021 2 года назад +1

    Expecting a simple 2m band receiver video from dx explorer as sooner😍

    • @dxexplorer
      @dxexplorer  2 года назад

      I haven't tried yet... but I think I've seen a few videos on RUclips and some simple schematics on Google and Pinterest. I may try one not a bad idea.

  • @sv2tcb
    @sv2tcb 2 года назад +2

    Very stable antenna! Bravo! I have heard that the baofeng has some problems like poor reception when it is connected to external antenna. Is that true? 73's

    • @dxexplorer
      @dxexplorer  2 года назад

      Not at all. Maybe only if the antenna is not properly adjusted I guess. Mine works like a charm. No issues at all.

    • @sv2tcb
      @sv2tcb 2 года назад +1

      @@dxexplorer i am looking for a vhf uhf transceiver that's why i am asking. Thank you, keep up the good work!

    • @dxexplorer
      @dxexplorer  2 года назад +1

      Cheaper ones as the Baofeng I don't know. I didn't search much either honestly... I was happy with what I have. What I want is not pleasant for my bank account )))

    • @sv2tcb
      @sv2tcb 2 года назад +1

      @@dxexplorer i like the icom 2730 or the kenwood tm-v71 but they are way too expensive! I may start with a baofeng as most people do. Thanks for the reply.
      Looking forward to seeing the antenna outside!

    • @dxexplorer
      @dxexplorer  2 года назад +1

      I have on my list a vintage Yaesu... let's maybe I will make my self a Christmas present. For now I'm happy with the little I have... is better than nothing ))) The antenna video at work... let's see maybe this weekend I will have time to film. I was busy cutting the wood getting ready for winter. I just got in the house a little ago dead tired lol. 73 buddy.

  • @alvarogaitan2529
    @alvarogaitan2529 8 месяцев назад +1

    great job thanks Cipriano 73 from kb2uew

    • @dxexplorer
      @dxexplorer  8 месяцев назад

      Thank you as well for watching my friend. 73, YO6DXE

  • @sv2tcb
    @sv2tcb 2 года назад +1

    Hi there! Are you working on the ssb transceiver?
    Many 73's!!

    • @dxexplorer
      @dxexplorer  2 года назад +1

      Hi Nikos. No my friend... I was crazy busy with work and working a little on my photography website / business. I have to make a loving as well ))) ... I come back to play with the toys in a little.

    • @sv2tcb
      @sv2tcb 2 года назад +1

      @@dxexplorer oh i understand, ok then, hope to see you with another project soon! 73's

    • @dxexplorer
      @dxexplorer  2 года назад +1

      Almost done running around so I hope soon I have the time. 73 my friend.

  • @anilkumar-u7r1u
    @anilkumar-u7r1u 6 месяцев назад +1

    making video plice (VU3 RFN)

    • @dxexplorer
      @dxexplorer  6 месяцев назад

      In this video ? I can't remember I must watch it again.

  • @tapaschakraborty3961
    @tapaschakraborty3961 Год назад +1

    Ok Nice de VU2TKC KOLKATA INDIA

  • @radioclubcampina4644
    @radioclubcampina4644 Год назад +1

    Felicitari pentru constructie! 73! YO9IGS

    • @dxexplorer
      @dxexplorer  Год назад

      Multumesc mult 😀 73, YO6DXE.