Terminated inverted U low noise antenna

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This topic contains 2 replies, has 2 voices, and was last updated by Layne AE1N Layne AE1N 1 year, 6 months ago.

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  • #5452
    Layne AE1N
    Layne AE1N
    Participant

    Not all of us have the space or funds to put up large antennas. If you live in an area with limited antenna space and higher local noise levels which make reception difficult, there are solutions. The following article by Chris G4HYG may just be your solution. Take a look:

    Terminated inverted U antenna with designs and model by Chris Moulding, G4HYG

    I sell many active antennas to radio amateurs who suffer from local noise problems. I’ve recently moved to a house with only a small area for antennas and I’m also getting local RF noise. It’s motivated me to start working on a low noise antenna that would be suitable for transmit use.

    I realised that it would have to be some form of loop antenna to avoid high impedance antenna ends picking up electric fields from the noise sources. It would also need a good current balun to isolate the antenna from the feeder cable that may have common mode RF noise on the shield. I recalled from my training in electrical engineering many years ago that you don’t need much spacing between ground rods to have a clean low noise connection so could some form of terminated traveling wave antenna be the solution?

    Terminated inverted U antenna

    FULL ARTICLE:

    http://www.crosscountrywireless.net

    /terminated_inverted_u.html

    You might also want to visit his store, Cross Country Wireless

    http://www.crosscountrywireless.net/

    Layne AE1N

    #5505
    Matt Sapienza
    Matt Sapienza
    Participant

    thanks Layne for sharing this i am a victim of electrical interference more so on 10 meters but only on the vertical on my g5rv i don’t receive any??? so I’m hoping? once my 10 meter moxon is installed and rotating on the roof  i will not have that issue i did contact eversource and received a complaint form and did receive a call back the electrical interference used to limited to the daytime then at night now its all the time its at a s6 to s8 sometimes . i even receive in my truck as soon as a drive over the cross st to my qth as soon as I’m in front and entering the driveway its there but less then 50-55 feet away from my qth there no interference so its a issue somewhere in the power lines in front of my qth i hope they can find? and fix the issue

    Matt Sapienza, N1ZGN

    #5506
    Layne AE1N
    Layne AE1N
    Participant

    There are some excellent resources provided by the ARRL on electrical interference:

    http://www.arrl.org/track-and-solve-electrical-interference
    http://www.arrl.org/power-line-noise

    and the following ARRL HANDBOOK

    Neighbor_Info

    Layne AE1N

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