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LW , MW and SW receiving antenna.

  • 18-07-2017 9:26pm
    #1
    Posts: 21,179 ✭✭✭✭


    I live in the country, have some RFI that I can't always eliminate such as the PSU from the Satellite receiver and the EV charge point.

    So my question is this, even though it's a pretty noise free environment should I go for Wellbrook Loop or long wire and ATU ?

    The Welbrooks get fantastic reviews and for nulling out interfering stations etc and seem to be ideal for receiving and then Hams usually use the long wire for transmitting but I'm only interested in receiving at the moment.


Comments

  • Registered Users, Registered Users 2 Posts: 1,035 ✭✭✭ei9go


    If you have the room in the country why not try a medium wave dipole and be amazed.

    Each side 234 feet fed by 50 or 75 ohm coax.


  • Posts: 21,179 ✭✭✭✭ [Deleted User]


    My issue is I don't have the means to install towers for antennas so they'd have to be low but I was thinking of long wire down low maybe running along the fence to the field beside me , though it's got electric fence for sheep it shouldn't be much of an issue.

    I have trees but not easy to get cables up there.

    I've been listening to the Web SDR's and long wires don't impress me all that much, actually one of the best is a Tc2m antenna and a dual loop connected in parallel. which is astonishingly quiet.

    Here's the Tc2m Websdr with the Tc2m antenna int he South West U.K

    http://southwest.ddns.net:8073/

    The Dual Loop in Belgium

    http://on5kq.ddns.net:8073/

    Long wires seem to pick up much more static but are good for transmitting.


  • Posts: 21,179 ✭✭✭✭ [Deleted User]


    I was reading up on beverage antennas and while I'd have the space North South I don't have the space West East which is the direction I would need it as they are very directional but they seem to offer great performance.

    I've been deciding between a long wire and a Loop and the loops seem to offer good performance particularly in areas of high RFI which would be most urban homes today.

    Long wires seem to pick up a lot of noise from listening to SDR's but this could be the way they're installed, good grounding is important.

    I called into my Mothers today and brought my portable Tecsun PL-660 and the noise was a killer, so I went around looking for the source or sources and the LCD TV was one, but the Vodafone Fibre Modem was causing the wipe out of several bands, it's crazy that these devices are allowed to emit so much RFI or at least there is nothing being done about it. It cause unbearable noice about 20-25 feet from the house and still audiable 35 feet away which make me realise that listening to LW,MW and SW is a hopeless cause for most homes today without an external antenna or a good quality loop antenna.

    Antennas like the AOR LA400 get great reviews but are expensive but there are cheaper alternatives. http://www.eham.net/reviews/detail/12800

    http://www.nevadaradio.co.uk/amateur-radio/antennas/active-antennas/aor-la-400

    If you live in a quiet area free from RFI then just 20-50 feet of wire connected to the internal telescopic antenna will greatly improve SW performance and a cheap loop such as the Tecsun AN 200 can make a big difference to MW reception, I have one and it's great but may work best with larger radios , smaller ones tend to need the radio held in the middle of the loop where larger radios may have the internal MW antenna higher up.

    https://www.amazon.co.uk/Tunable-Mediumwave-Antenna-Portable-DESKTOP-x/dp/B00BI9WMQM/ref=sr_1_1?ie=UTF8&qid=1501330946&sr=8-1&keywords=tecsun+an200

    From listening to the WEB Sdr's the long wires and dipoles don't seem to make a big difference over the amplified loops, however the long wire is obviously going to be much cheaper but a lot harder to install, depending on your garden.


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