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Thread: 35' PVC Antenna Mast/Tower Ideas

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  1. #11
    Join Date
    Feb 2003
    Location
    SW Missouri
    Posts
    3,854

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    Quote Originally Posted by WX7G View Post
    Wood on the other hand is very nice
    Like the 40' A-frame made out of 2x2 wood in all the ARRL antenna books? They must work.
    73, Mike
    http://www.w0btu.com

  2. #12

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    Thank you very much! I'll give it a try.

    Cheers





    ------------------------------------------------------
    typing service

  3. #13
    Join Date
    Nov 2009
    Location
    Irvine, California
    Posts
    181

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    If you haven't seen what Max Gain Systems offers, I recommend you check them out: www.mgs4u.com. I've got the 50' telescoping fiberglass mast. It is solid in high winds. Needs to be guyed of course. My dipole is set at a height of 43 feet. 1/8" thick material so it's super rigid.

    Jeff W6UX

  4. #14

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    Quote Originally Posted by W0BTU View Post
    Like the 40' A-frame made out of 2x2 wood in all the ARRL antenna books? They must work.
    I have built many of the ARRL Handbook A-frame towers. Up to 40' using 2 x 4 lumber for Yagis, 2 x 2 lumber for wire antennas, and 1 x 2 lumber for lightweight wire antennas. One of the nice things about the 1 x 2 A-frame is that if it does fall down it isn't going to damage anything. And at $1 per 8' length of lumber the paint costs more than the wood.

  5. #15
    Join Date
    Feb 2003
    Location
    SW Missouri
    Posts
    3,854

    Question

    Quote Originally Posted by WX7G View Post
    I have built many of the ARRL Handbook A-frame towers. Up to 40' using 2 x 4 lumber for Yagis, ...
    I wonder how high you could go with 2x4 -- perhaps with 2x6 at the bottom -- for a wire antenna?
    73, Mike
    http://www.w0btu.com

  6. #16

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    Quote Originally Posted by KD8EZP View Post
    Does anybody have any thoughts on building a 35' mast useing 4" PVC pipe?
    Modulus of elasticity of PVC pipe = 360,000 psi
    Modulus of elasticity of aluminum pipe = 10,000,000 psi

    ... which means PVC pipe is 27 times more "floppy" than aluminum (assuming the same diameter and wall thickness). Imagine a stiff breeze that makes the aluminum mast move one inch at the top; the PVC mast will bend by more than 2 feet. You'll be surprised how floppy the PVC is. It's like a noodle. With guy wires or cords it can be made to work, but eventually you'll wish you had steel, aluminum or fiberglass instead. 73 Jim

  7. #17
    Join Date
    Dec 2004
    Location
    Riley Ks
    Posts
    630

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    my experience only.
    I have used PVC and it looks good for a while. The sun tends to warm it up and it begins to show warping. After while it looks crappy. Like a not so stiff worm .
    Sure PVC is cheap and it does tend to make cheap temp antennas that usually have a short life span.
    Most importantly is that "you gotta do what you gotta do." to get on the air.

    As for the mentioned Fiberglas poles from EBAY. I bought 3 of them. They do not telescope but are Ex Military and in the green carry bag with all the military markings. Buy it now $7.50 and $24.00 for shipping NY to KS USPS.
    12 poles @ 48" long I thought it was a decent deal.
    Field day, vert antenna, support for long wire, many potential uses.
    let us know what you do and how it worked out for ya.
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