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Thread: 40 meter rotatable dipole

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  1. #1
    Join Date
    Sep 2010
    Location
    Rodadero Sur, Santa Marta, Colombia
    Posts
    222

    Default 40 meter rotatable dipole

    I'm looking for a 40 meter rotatable dipole for my new tower at the new QTH. This will be 13 meters AGL which I know isn't the ideal height but I need to do with what the HOA will allow (grin).

    Any suggestions as to the best 40 meter rotatable dipole out there (without spending more than 500 bucks)?

    73s --

    KJ4YZF/HK2
    ---
    Larry Snyder, HK2LS, [URL="http://www.rn.org"]www.RN.org[/URL]

  2. #2

    Default

    Not sure about "best," but I have a Cushcraft D40 which is a single band rotatable 40m dipole. It's loaded so it's only about 43' long, but it seems pretty efficient, can easily take legal limit power, and has a nice and very obvious pattern with very deep nulls off the ends.

    http://www.cushcraftamateur.com/Prod...?productid=D40

    I think it's under $400.

  3. #3

    Default

    I'll second the Cushcraft

    Carl

  4. #4

    Default

    Quote Originally Posted by KJ4YZF View Post
    I'm looking for a 40 meter rotatable dipole for my new tower at the new QTH. This will be 13 meters AGL which I know isn't the ideal height but I need to do with what the HOA will allow (grin).

    Any suggestions as to the best 40 meter rotatable dipole out there (without spending more than 500 bucks)?

    73s --

    KJ4YZF/HK2
    Not to try and second guess what you want, but do you as yet have *anything* on the tower? Maybe a Cushcraft A3S with a 40m add on kit would suit you as well... and give you 10, 15, and 20 as well.

  5. #5
    Join Date
    Sep 2010
    Location
    Rodadero Sur, Santa Marta, Colombia
    Posts
    222

    Default

    yes, sorry - a Tennadyne T6 on the bottom and a dual band fiberglass 2 meter / 440 antenna on the very top. The tower is 10 meters and there is a 5 meter pole on the tower (only 4 usuable as 1 meter goes into the top of the tower and into the rotor).

    Larry
    ---
    Larry Snyder, HK2LS, [URL="http://www.rn.org"]www.RN.org[/URL]

  6. #6

    Default

    Quote Originally Posted by KJ4YZF View Post
    yes, sorry - a Tennadyne T6 on the bottom and a dual band fiberglass 2 meter / 440 antenna on the very top. The tower is 10 meters and there is a 5 meter pole on the tower (only 4 usuable as 1 meter goes into the top of the tower and into the rotor).

    Larry
    I'd put the 40m rotary dipole at the top of the mast as far above the T6 as possible, with the vertical 2m/70cm immediately above that.

  7. #7
    Join Date
    Dec 2005
    Location
    Grayslake, IL
    Posts
    30

    Default

    I just got the Mosley S-401 40M rotatable dipole. Have not had a chance to put up, but seems pretty solid. I will mount under my Mosley TA-63N Yagi.

  8. #8

    Default

    Be very careful about wind load on that 4' of mast. That will be the weakest point and will greatly increase the loading on the tower. I'd multiply by about 4 the wind load factor on any antenna near the end of that mast.
    [B][COLOR=#008000]vy 73,

    Casey, TI2/NA7U
    [/COLOR][URL="http://casimiro.hubpages.com/_QRZForums/hub/What-Can-You-Do-With-Amateur-Radio-The-Skys-The-Limit"]Amateur Radio: The Sky's the Limit![COLOR=#008000][/COLOR][/URL][/B]
    [URL="http://casimiro.hubpages.com/_QRZForums/hub/What-Can-You-Do-With-Amateur-Radio-The-Skys-The-Limit"][SIGPIC][/SIGPIC][/URL]

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