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Foundations of Amateur Radio - Episode 105

Discussion in 'Amateur Radio News' started by VK6FLAB, Jun 11, 2017.

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  1. VK6FLAB

    VK6FLAB Ham Member QRZ Page

    foundations-of-amateur-radio_300.jpg

    Is the ideal antenna round? This week I look at an antenna from a user experience perspective and discuss what kinds of things go into making an antenna "fun to use".

    Foundations of Amateur Radio is a weekly podcast about the amazing hobby of Amateur or Ham Radio. You can listen on-line, on-demand and even on-air. For your personal copy, visit iTunes and search for my callsign, VK6FLAB, or visit the website http://podcasts.itmaze.com.au/foundations/ and scroll to the bottom for the current episode.

    Onno VK6FLAB
     
  2. KQ6XA

    KQ6XA Ham Member QRZ Page

  3. W1YW

    W1YW Ham Member QRZ Page

    Bonnie,

    What the heck is he talking about?
     
  4. KK5JY

    KK5JY Premium Subscriber QRZ Page

    Looks like another AlexLoop commercial.

    I like STLs. I think they are great antennas. They are even better if they are carefully home-brewed, to maximize performance on the bands preferred by the builder. I'm also very happy that so many people are "discovering" the STL, even if some of the designs they are trying are not optimal. The STL has a great potential to get/keep a lot of people on the air without need for towers, permits, or even outdoor antennas at all.

    That said, I don't understand why every few "news" articles on QRZ is about the AlexLoop. No matter how great it is, it's not "news" and hasn't been for a very long time. It's a nice piece of kit, but it's quite overpriced for its specs, and its main feature is convenience, by keeping the user from having to build an STL from scratch.

    I'm glad there are fans of AlexLoop, and STLs in general. But it's time to get back to actual "news" in the "News" section of QRZ, please. :)
     
    AF7EC, KB9VCA, W9RLG and 2 others like this.
  5. VK6FLAB

    VK6FLAB Ham Member QRZ Page

    I'm pleased that it only looks like it, since it isn't one. I didn't purchase it, I have it on loan from a friend and I was amazed to find an antenna that actually matched the user interface of turning the VFO and having a matching movement in the adjustment of the antenna.

    I have no idea if it's value for money, since I didn't ask how much it cost, nor can I compare it to a home-brew loop, since the one I built never quite made it to the point of usability, despite my best efforts.

    Thanks for listening to the podcast. 73 de Onno VK6FLAB
     
    W7SJP likes this.
  6. KK5JY

    KK5JY Premium Subscriber QRZ Page

    I guess that means you are part of AL's target audience. ;)
    I'm glad you enjoyed using the STL. In general, they are very cool antennas.
     
    W7SJP and VK6FLAB like this.
  7. W9RLG

    W9RLG Ham Member QRZ Page

    Seems to ,lately that's all there has ben in the new here, is advertisements for some gimmick or other and nothing that is news worthy.

    Bob
     
    KK5JY likes this.
  8. K3FHP

    K3FHP XML Subscriber QRZ Page

    The advertising for antennas like this, the Chameleon, etc. Can lead astray hose who know no better. Yes, they can be very effective if used properly but a 3 foot loop on 7mhz yields 5% efficiency at best and lower frequencies even worse. Yes, you may make a contact.....contacts have been made on dummy loads with 20ft of coax, but I wouldn't advertise one as a miracle compact antenna. And at these prices.......certainly makes the MFJ remote tune loop for 10mhz up look like a bargain(no advertisement intended, don't own one ).
     
    KR3DX and VK6APZ like this.
  9. KK5JY

    KK5JY Premium Subscriber QRZ Page

    It is interesting that ham use of STLs is somewhat different than those of other services, like military or maritime mobile HF. The roughly two octave range of most STLs is about right for services whose common operational range is, say, 4 to 16MHz (one octave either side of 8MHz). The maritime folks still have HF gear on 2MHz, but the losses from dropping that extra octave might not be a big deal when the loop is mounted on a weather deck over salt water.

    The 3ft loop is fine for the upper half of the HF spectrum, but for operation on the lower bands, you do need a somewhat larger loop conductor.
     
    OH2FFY likes this.
  10. K0UO

    K0UO Subscriber QRZ Page

    In the broadcast business STL means Studio transmitter link. For HF I use the diamond shaped rhombic, but they take about 6 or 7 acres per antenna and I have 3 of them up.
     
    KK6JKC, KA0KA and AF4RK like this.

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