Callsign
ad: dxeng
Page 1 of 8 1 2 3 4 5 ... LastLast
Results 1 to 10 of 74

Thread: Homebrew HF multi-band log periodic?

ad: L-HROutlet
ad: l-assoc
ad: l-Waters
ad: l-tentec
ad: l-gcopper
ad: l-Heil
ad: l-WarrenG
ad: l-innov
ad: l-rl

Contribute
to QRZ

  1. #1

    Default Homebrew HF multi-band log periodic?

    Anyone ever tried to build one?
    TS-570dg, home brew 6-band spiderbeam, Mosley TA-54, a hex, and verticals.

  2. #2
    Join Date
    Jan 2000
    Location
    Altus, OK USA
    Posts
    620

    Default

    Quote Originally Posted by AE7F View Post
    Anyone ever tried to build one?
    I have not but here are plans, if you want to try yourself.

    73
    ---

    Lloyd Colston KC5FM
    Altus, OK USA [url]http://wx5em.us[/url]
    Straight Key Century Club #5676
    Croatian Telegraphy Club CTC # 1.931
    CARF #294 Ten-Ten #10231 NAQCC #4408
    Southcars #8276 QCWA #31935 ARRL #8037325
    [url]http://www.carf.net[/url] [url]http://www.ten-ten.org[/url] [URL="http://norcars.net/"]http://norcars.net/[/URL]
    [URL="http://kc5fm.blogspot.com"]http://kc5fm.blogspot.com[/URL]

  3. #3

    Post

    TennaDyne (Roger Greenfield, WB8NDC) now located in Michigan still makes Log-Periodic antennas :-)
    http://www.tennadyne.com/index.html

    Chuck Brainard, KA1PM was the founder of TennaDyne and sold the business to Roger in 2004.
    http://www.tennadyne.com/about_Roger.htm

    w9gb
    Nullius in verba

  4. #4

    Default

    Very cool, thanks. This is interesting:
    loghf2big.jpg

    Quote Originally Posted by KC5FM View Post
    I have not but here are plans, if you want to try yourself.

    73
    TS-570dg, home brew 6-band spiderbeam, Mosley TA-54, a hex, and verticals.

  5. #5

    Default

    Thanks. I have been looking at Tennadyne antennas for awhile (antenna comparisons.xls). You can see that I found the T6 to be a very, very nice antenna for the price and have been looking around for one.

    Quote Originally Posted by W9GB View Post
    TennaDyne (Roger Greenfield, WB8NDC) now located in Michigan still makes Log-Periodic antennas :-)
    http://www.tennadyne.com/index.html

    Chuck Brainard, KA1PM was the founder of TennaDyne and sold the business to Roger in 2004.
    http://www.tennadyne.com/about_Roger.htm

    w9gb
    TS-570dg, home brew 6-band spiderbeam, Mosley TA-54, a hex, and verticals.

  6. #6

    Default

    Unless you have access to the materials for very discounted cost, it would be hard to beat the price of even a new Tennadyne.

    Seamless aluminum 6061T6 alloy tubing is expensive, and the T6 uses a lot of it, including 24' of extruded square boom stock and about 160 feet of round tubing of various snug fitting diameters, plus several precision cut insulating blocks, thick machined PVC insulating blocks at the mast mounting point, etc. It would make an interesting project, but certainly not an inexpensive one.
    What if soy milk is just regular milk introducing itself in Spanish?

  7. #7

    Default

    Yeah, their pricing is good for the T6 but one does wonder what materials would cost for the aforementioned LP design.

    http://www.texastowers.com/aluminum_.htm

    Quote Originally Posted by WB2WIK View Post
    Unless you have access to the materials for very discounted cost, it would be hard to beat the price of even a new Tennadyne.

    Seamless aluminum 6061T6 alloy tubing is expensive, and the T6 uses a lot of it, including 24' of extruded square boom stock and about 160 feet of round tubing of various snug fitting diameters, plus several precision cut insulating blocks, thick machined PVC insulating blocks at the mast mounting point, etc. It would make an interesting project, but certainly not an inexpensive one.
    TS-570dg, home brew 6-band spiderbeam, Mosley TA-54, a hex, and verticals.

  8. #8
    Join Date
    Feb 2004
    Location
    Bakersfield, CA
    Posts
    4,864

    Default

    The ARRL Antenna Handbook has detailed instructions also at least mine does. You could try that. You might also want to pick up a copy of the handbook, the older ones are somewhat better but I don't know if they have the LP plans in them.
    Hope this helps
    73
    Gary

  9. #9
    Join Date
    Apr 2007
    Location
    Tyalgum, near Murwillumbah ,far north coast of NSW
    Posts
    128

    Default Wire LPDA

    You might consider a wire type LPDA?
    Maybe a 40ft boom and 12+ elements.
    See Cebick W4RNL site for some big LPDA designs.
    If it does not work well take it all down and use the boom as another antenna mast!!
    The rear spreaders as the basis for a rotatable dipole etc.........
    I would love to try one one day.Might need a bigger back yard though!
    Good luck
    Brendan

  10. #10

    Default

    Quote Originally Posted by AE7F View Post
    Yeah, their pricing is good for the T6 but one does wonder what materials would cost for the aforementioned LP design.

    http://www.texastowers.com/aluminum_.htm
    Using those costs, the aluminum tubing would run about $280. Then you'd have to cut it in three dozen places and drill it it 36 places to join the elements, and 12 more places in the booms to insert the elements. You'd still have to create mast to boom brackets, PVC insulating spacers, and the big PVC mast clamp insulators, plus add several dozen SS screws, bolts, etc.

    It could probably be built for about $350 worth of parts, not considering shipping costs for the tubing.
    What if soy milk is just regular milk introducing itself in Spanish?

Page 1 of 8 1 2 3 4 5 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •