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Homebrew Dipole Insulators

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by N4DCT, Apr 28, 2012.

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  1. N4DCT

    N4DCT XML Subscriber QRZ Page

    Where can I get insulators or how can I make them without ordering online from places like Gigaparts?
     
  2. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    I just took a hunk of board and drilled a coupla holes in it. Cost? Absolutely FREE!
     
  3. AD6KA

    AD6KA Ham Member QRZ Page

    I've drilled holes in 3" or 4" long scraps of 1/2" to 1" PVC pipe
    to make wire insulators.

    Every DIY'er has scraps of those around, or ask a neighbor.
    or use wood, as posted above. (If I lived in a REALLY rainy
    area, (>50 inches/year) and used wood, I'd throw a couple coats of
    Marine Spar Varnish on them. But that's just me.

    IF your wire antenna is going to be long, heavy, or high up
    in the air (pain to get up and down) then consider "Strain Relief"
    type insulators
    . A Google Search will find you designs you can copy
    in your shop.

    Some may say "UV Rays will make the PVC brittle and crack".
    Not in my experience, I live in So Cal: Hot, Dry, Sunny, almost
    all year round. Never had a PVC failure due to WX.

    73, Ken AD6KA
     
  4. AB9LZ

    AB9LZ Ham Member QRZ Page

    Plastic plumbing tee's make for good center insulators. Never had one fail in a decade of use.

    73 m/4
     
  5. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    I love this page from the army field manual on communications:

    Figure_D-15_Expedient_insulators_(FM_7-93_1995).gif
     
  6. K8ERV

    K8ERV Ham Member QRZ Page

    You might check electri fence insulators, I'm not too familiar with them.

    TOM K8ERV Montrose Colo
     
  7. K9STH

    K9STH Ham Member QRZ Page

    PVC pipe 1/2-inch in diameter costs like $1 for a 10-foot section here in the Dallas, Texas, area. Depending on the length, you can get a LOT of insulators from a single 10-foot section. Just drill a 1/8th inch, or so, hole through the pipe about 1/2-inch from each end. Pipe in either 3/4ths inch diameter or 1-inch diameter is a little bit more but still not anywhere near being expensive.

    The white PVC for my swimming pool pump has been exposed to the Texas sun for right at 30-years. Absolutely no chalking or other damage. Years ago, PVC pipe was subject to ultra-violet but anything made in the past over 3-decades seems to be fine.

    Glen, K9STH
     
  8. NA7U

    NA7U Ham Member QRZ Page

    I usually use PVC cuz it's handy, but it really should be painted to prevent UV damage (most of my antennas don't stay up long enough for that to happen, though, always experimenting ...). Zareba makes some good and cheap UV-proof fence insulators in various sizes. I've used them to build ladder line, but they'd be fine for antenna support. I really prefer glass/ceramic insulators because I think they are classier. The HW stores around here have lots of them and they are not expensive at all (after all you only need 2-4 of them). The cheapest way to do this is to simply solder loops on the end of your wire and directly attach the rope!
     
  9. K1DNR

    K1DNR Ham Member QRZ Page

    These are $1 a piece. Sold by many vendors and on EBAY. No drilling/cutting/sanding required. www.grumpyshop.net
     

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  10. WA7PRC

    WA7PRC Premium Subscriber QRZ Page

    Davis RF is my supplier of choice. They stock Daburn porcelain compression (aka "egg") insulators, as well as just about anything else you might need for a wire antenna. You can make insulators out of anything insulating that's strong enough but, unless you need a boatload of them, you won't save much.
     
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