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  1. #1
    Conch Master KJ3N's Avatar
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    Maybe someone can enlighten me

    Can anyone figure out what this guy expected, other than a miracle?

    http://www.eham.net/ehamforum/smf/in...,100680.0.html
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  2. #2
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    It looks sort of like the bait I used to use to catch squid as a kid on Martha's Vineyard.

    I'd chuck it in the water and see what bites.
    Jim
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  3. #3
    Island Godfather NA4BH's Avatar
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    You should tell him to try a fractal vertical antenna. Probably work as good as the one he has now.
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    Administrator N8YX's Avatar
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    Can anyone decipher the following?

    The flat dipole configuration would be best for gain side-to-side but the SWR would be above 1.5 to 1 because of impedance around 70 ohms. It would not be good for QSOs with stations with vertical antennas.
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  5. #5
    Orca Whisperer W3WN's Avatar
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    Quote Originally Posted by N8YX View Post
    Can anyone decipher the following?
    The flat dipole configuration would be best for gain side-to-side but the SWR would be above 1.5 to 1 because of impedance around 70 ohms. It would not be good for QSOs with stations with vertical antennas.
    (a) Gain off the sides of the antenna is better when it is configured as a linear dipole, not an inverted V
    (b) SWR in the above configuration will be higher because a linear dipole has a characteristic impedance at the center feed-poin of 70-75 ohms, whereas an inverted V has a characteristic impedance of 50 - 52 ohms.
    (c) Because the flat dipole is radiating in the horizontal plane, thus horizontal polarization, it won't work well when communicating with stations running vertical polarization.
    (c1) Whomever wrote (c) above is full of male bovine animal waste byproduct.
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  6. #6
    Orca Whisperer W3WN's Avatar
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    Quote Originally Posted by KJ3N View Post
    Can anyone figure out what this guy expected, other than a miracle?

    http://www.eham.net/ehamforum/smf/in...,100680.0.html
    Well, let me put it this way...

    40 years ago, he'd have bought a Gotham vertical. Ya know what I mean?
    “Nobody is going to feel sorry for us. 90% of the people don’t care, the other 10% are glad it happened.” — Clint Hurdle, 2019

    BAN THE DH!

    Fudd's First Law of Opposition: If you push something hard enough, it WILL fall down.
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  7. #7
    Conch Master KJ3N's Avatar
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    Quote Originally Posted by W3WN View Post
    Well, let me put it this way...

    40 years ago, he'd have bought a Gotham vertical. Ya know what I mean?
    No, I don't. That's quite a bit before I got into ham radio. Please elucidate.
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    "If someone tells you he believes in and talks to an invisible bunny named Harvey, you put him on medication and a regimen of therapy. If someone tells you he believes in and talks to God, well, that's perfectly acceptable. Why that's the case is impossible for me to fathom." - WP2XX



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    Whacker Knot WØTKX's Avatar
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  9. #9
    Conch Master KJ3N's Avatar
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    Antenna ads from the 50s and 60s? Boy, some of you are really old farts.

    I imagine that the CHA-250B is the modern equivalent of the Gotham.
    "People Who Don't Want Their Beliefs Laughed at Shouldn't Have Such Funny Beliefs" -AD5MB

    "If someone tells you he believes in and talks to an invisible bunny named Harvey, you put him on medication and a regimen of therapy. If someone tells you he believes in and talks to God, well, that's perfectly acceptable. Why that's the case is impossible for me to fathom." - WP2XX



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  10. #10
    Orca Whisperer W3WN's Avatar
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    Quote Originally Posted by KJ3N View Post
    Antenna ads from the 50s and 60s? Boy, some of you are really old farts.

    I imagine that the CHA-250B is the modern equivalent of the Gotham.
    Reread the ad. Glowing testimonial about this "miracle" antenna from K6INI, right?

    Guess who owned Gotham Verticals?

    ...

    The basic concept of the GV wasn't bad... an vertical with a loading coil. Of course, it would have helped if it was actually resonant, and if the buyer knew that he/she had to lay down a few radials. Oh, and that it was thin, cheap aluminum that was prone to breaking in high winds... and not so high winds... want to know how I know that?


    No Jim, I guess you don't get it. But that's ok. Now GTFOML, kid...
    “Nobody is going to feel sorry for us. 90% of the people don’t care, the other 10% are glad it happened.” — Clint Hurdle, 2019

    BAN THE DH!

    Fudd's First Law of Opposition: If you push something hard enough, it WILL fall down.
    Teslacle's Deviant to Fudd's Law: It goes in, it must go out.

    "The 2020 election wasn't stolen, and speaking the truth is only a crime in countries ruled by tyrants" - Liz Cheney


    “Nero fiddled while Rome burned. Trump golfed.” — Bernie Sanders

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