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Thread: hdtv aerials

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    Lightbulb hdtv aerials

    new designs



Look Here ->
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    Only suitable for indoors where there is already excellent signals present.

    The cheapest manufactured indoor antenna will probably work better.

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    there is no "new designs" : section on the forum so how do we let new ideas out ???? ps the uhf mixer is going well so far not finished yet ???

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    Quote Originally Posted by hinekadon View Post
    there is no "new designs" : section on the forum so how do we let new ideas out ???? ps the uhf mixer is going well so far not finished yet ???
    Just post in the forum that the 'new design' is relevant to.

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    did you read all the article ??? i must have posted it in the right section then

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    Quote Originally Posted by hinekadon View Post
    did you read all the article ??? i must have posted it in the right section then
    I read it, which is why I commented.

    It's hardly a 'new design' though. Such things have been around for many years.

    If it wasn't in the applicable section, I would have moved it.

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    I read very avidly the ARRL Antenna book published 30 years ago and while much of the maths and science is beyond me, the only thing I can see that's 'New' is what is being received by the antenna.
    Improvements in the devises to receive and transmit have gone hand in hand with experimentation in the design of antenna.
    At one time my main interest was in feed lines as I wanted to place a TV antenna at a distance and not loose all the signal in the line.
    I was facsinated to read that the higher the frequency, the signal doesnt travel IN the wire but ON it.
    This same effect is also seen on Very High Voltage Electricity transmission lines.
    One design antenna I havent seen used in OZ for UHF was 2 triangle shaped 'plates' made of copper or aluminium with the peaks together to make the feedpoint and it was called a 'Bow Tie' antenna.

    Even the now familiar 'Panel Antenna' used on Mobile Phone Towers I dont think is new but is an adaptation of known principles along with the materials used to manufacture them.

    We have come a long way since the days of connecting a very long length of wire to our spark generator strung out on poles.
    Last edited by gordon_s1942; 23-07-18 at 04:56 PM.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

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    I have built several bow-ties they all work well mainly milimetre bands

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    The ones I saw were in US magazines like Popular Science/Mechanics and were suggested for use in the late 50's and 60's to receive the UHF TV channels which I gather were being made available in that era.

    Back then some combination
    antennas used both tape and Co-ax, 300 ohm tape for VHF and Co-ax for the UHF.
    Last edited by gordon_s1942; 23-07-18 at 06:01 PM.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

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