Magnetic Loop Antenna Band Selection.

แชร์
ฝัง
  • เผยแพร่เมื่อ 26 ส.ค. 2024
  • Since my magnetic loop antenna uses an FT-140-43 toroid for feeding, I have always found it bothersome to have to add of remove turns to the toroid for band selection. Finally I decided to build a band selector described in this video.
    Magnetic Loop build: • Building a Magnetic Lo... and • Building a Magnetic Lo...
    Download the STL file: www.thingivers...
    Multimeter: www.amazon.co....
    Buy me a coffee at ko-fi.com/gilgsn
    Shirts and mugs: teespring.com/...
    Help this channel: / radioprepper
    Facebook: / radiopreppers
    Radio Preppers Forum: radiopreppers.com
    Subscribe on my alternate platform:
    odysee.com/@Ra...
    Help this channel by donating crypto:
    BTC : bc1qc5jq4dxt7359sh80lkv9v8rlsgnh322hmn6xyc
    ETH : 0xe7cC2e415E0D2d1De91604B2b693f124dfBCf9B8
    DOGE : D6ha2Ax7UhmtEMPC4fsaEJPxHrLSu3BwYW
    XRP : r93TuQrkEq3X9UDkqXKYWaTkteB2ap4hMq
    LTC : LYwDy55mZSeb1Czx6JUiTS5YkqjfmWKK5H
    SOL : Ee9iJx6ouBih1beozjWrwYBQA9tQgr4nYwosZYsjfxaj
    TRX : TMvoMDkc2YJybCSk1SNYjW6wFbktZ8qoNA
    DOT : 14BeKCDq3FSvtF4k9i1n4DyqZbYTT9HMt1kxemQmkjkVeKZB
    AVAX : 0xe7cC2e415E0D2d1De91604B2b693f124dfBCf9B8
    ATOM : cosmos1l8ct3kesrh48n2yeekh9e2ncrm8s397xxwf34f
    ALGO : ZI3QSV4UV3KT6JFN4TUWO2TWEM46MQENXW3RTLQEH4OLSSY2SONYKR7XCM
    XTZ : tz1YS3MSqU63VKGkUqomt1ZV4eDFY7dJD9mX
    DISCLAIMER: The Radio Prepper logo (depicting a microphone) is indeed inspired from a famous flag created in 1775. It is NOTHING BUT a symbol of freedom and independence. It does NOT imply support to any political group. It does NOT imply, represent nor support any ideology with an intent on harming anyone. Freedom means freedom from persecution based on any human trait or belief such as, non exhaustively, race, gender, religion, sexual orientation or nationality. The Radio Prepper channel is a technology and science channel with a focus on preparedness and use of radio technology for disaster relief and small group communications in times of need. It is apolitical and open to anyone sharing the same interests.
  • วิทยาศาสตร์และเทคโนโลยี

ความคิดเห็น • 51

  • @mikefromflorida8357
    @mikefromflorida8357 3 หลายเดือนก่อน +1

    I have little use for metric, but you are correct that metric is better for applications such as this. 👍

  • @allancopland1768
    @allancopland1768 5 หลายเดือนก่อน +1

    Yup, a tapped ferrite trafo works well.

  • @cwguy8960
    @cwguy8960 ปีที่แล้ว +1

    That was a great 3-D print project! My homebrew loops have always been mono-band.... I hope this multiband solution works well for you - I went many years being 'cursed' with not having room for HF antennas - but the mag-loop saved the day!!

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Thanks, it sure did for me!

  • @RobertWardJones
    @RobertWardJones ปีที่แล้ว

    I enjoyed seeing the build in tinker cad. Its nice to see something practical being made from scratch with a 3d printer instead of just downloaded figurines, or not being shown at all how a part was designed with the "I just made this 3d printed part" non-explanations. Good Job!

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Yep, I never did nor will ever print anything not practical.

  • @fjs1111
    @fjs1111 ปีที่แล้ว +1

    Nice work Gil, you did nice design!!

  • @radio.f4htz
    @radio.f4htz ปีที่แล้ว +1

    Great !!! Thank you for the job Gil.

  • @ayoubmbeker2772
    @ayoubmbeker2772 ปีที่แล้ว +1

    Great job Gil! I love your Excellent design ;)

  • @vincei4252
    @vincei4252 ปีที่แล้ว +4

    Very cool, Gil. Love your DIY loop! I can't get over how expensive these things are buying from the usual sellers. I have some vacuum caps so I'll probably build one of these myself too. ps. Your private email is showing in the TinkerCad window.

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Thanks, no big deal :-) The capacitors are the expensive parts.. It is however often the only option for apartments but fortunately performance is very good..

    • @Radiogenes
      @Radiogenes ปีที่แล้ว +1

      Really cool! Thank you Gil. That BNC to banana are the best thing

  • @pasjeihobby
    @pasjeihobby ปีที่แล้ว +1

    I wasn't subscribed ?. Weird. I love this channel.

  • @welshbikepackingadventures
    @welshbikepackingadventures ปีที่แล้ว +1

    wow this is genius! thanks Gil, 73s

  • @Bill-HRT
    @Bill-HRT ปีที่แล้ว +1

    Thank you for sharing.

  • @DonDegidio
    @DonDegidio ปีที่แล้ว +1

    Hi Gil,
    Excellent design. Hope to make a contact when my CW gets better. Stay safe. 73 WJ3U

  • @phildurall7466
    @phildurall7466 ปีที่แล้ว +1

    Nicely done Sir! 73- KF6IF

  • @murphybrown32216
    @murphybrown32216 ปีที่แล้ว +1

    what about the caps, sizes and where they go?

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว +1

      There is only one high voltage variable capacitor at the opposite side of the loop, around 300 to 400pf. See the loop construction videos..

  • @Steve-GM0HUU
    @Steve-GM0HUU ปีที่แล้ว

    Looks good Gil. Glad to see that some glue was involved 😄. I will listen out for you in the evenings. Do you have any favourite CW frequency, maybe on 40m?

  • @pascalf5pnp310
    @pascalf5pnp310 ปีที่แล้ว

    on aurait bien aimé la voir tourner en live, cette loop !!! est ce pointu a regler, ou le fait de faire ce boitier aide pour le reglage ??

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Bonjour, très pointu oui!

  • @DavidBamford
    @DavidBamford ปีที่แล้ว

    Very nice Gil! How do you go about calculating the inductances? It would be nice to see the output on an antenna analyzer. Thanks ad 73 de W2DAB

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      I don't ;-) trial and error...

  • @digus
    @digus ปีที่แล้ว

    Very cool.
    You should get and post a few alternate crypto addresses (other than just BTC). Perhaps Eth, ADA & LTC.
    Sending BTC generally has a higher minimum (>$20) + fees, on most exchanges.

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว +1

      I didn't know, will do, thanks!

    • @r2d2delta58
      @r2d2delta58 ปีที่แล้ว +1

      @@RadioPrepper
      I've already paid for a beer with BTC, no problem. Have had BTC for a few years now it has evolved more as a settlement layer. The Lightning Network is ideal for transferring small amounts. If I've managed to copy your BTC address from the description, I'll be happy to send you a little greeting.
      vy 73

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว +1

      Absolutely awesome thanks!

    • @r2d2delta58
      @r2d2delta58 ปีที่แล้ว

      @@RadioPrepper
      It's just a few SATs, you deserve more. you can control the transaction speed with the network fee, which is set relatively low in my case - but it's on the way.

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Thanks, I really need to learn more about crypto... I added ETH and LTE, that might make it easier.. If I can buy some crypto, which are more promising?

  • @cacciskagrana6603
    @cacciskagrana6603 6 หลายเดือนก่อน +1

    Hai stl?

    • @RadioPrepper
      @RadioPrepper  6 หลายเดือนก่อน

      www.thingiverse.com/thing:5661856

    • @cacciskagrana6603
      @cacciskagrana6603 6 หลายเดือนก่อน +1

      @@RadioPrepper grazie

  • @ronleblanc9832
    @ronleblanc9832 ปีที่แล้ว

    how big is the loop

  • @PatAutrey
    @PatAutrey ปีที่แล้ว

    Would you please confirm which toroid magnet you're using and also the dimensions of the loop

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว +1

      Hi, it's an FT-140-43, 5m perimeter loop, 16mm copper tubing (5/8).

    • @PatAutrey
      @PatAutrey ปีที่แล้ว +1

      @@RadioPrepper thank you buddy!

  • @thomasesposito6962
    @thomasesposito6962 ปีที่แล้ว

    Bonjours je débute dans le monde de la CB et je voudrais savoir, est-ce l'équivalent d'une boîte d'accord ?

    • @RadioPrepper
      @RadioPrepper  ปีที่แล้ว

      Bonjour, non. C'est en fait un transformateur qui dans ce cas sert à alimenter l'antenne. Ceci dit les deux ajustent l'impédance, donc ce n'est pas aussi simple qu'un "non" catégorique ;-)

    • @thomasesposito6962
      @thomasesposito6962 ปีที่แล้ว

      @@RadioPrepper merci pour ta réponse 👍🏻

  • @montydouglas8001
    @montydouglas8001 ปีที่แล้ว

    😩 Promo_SM!!!

  • @horstjaeger2569
    @horstjaeger2569 ปีที่แล้ว

    Great Projekt Gill! Please more often vids! 73 de Nik OE3SZE