1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice
Dismiss Notice
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.

OCF Windom

Discussion in 'Amateur Radio Antennas' started by W1MSG, Sep 29, 2010.

  1. W1MSG

    W1MSG Now W1MSG

    Joined:
    May 9, 2010
    Messages:
    499
    Likes Received:
    18
    Just put up a new antenna yesterday. Bought the Buxcomm Windom OCF for 6 to 80m.
    I immediately noticed an increase in the RX over the G5RV Jr. My reports have been a bit better as well. Due to constraints in my Yard this was the best fit. Its up about 30 feet and is doing a fine job. I still need to bury the coax about 25 feet worth and then the install will be complete!

    The Buxcomm comes with a Balun and I opted for the 4:1 Balun which is what they recommend for my height.



    Next is getting my Tower up next to the house and getting the New G-5400 AZ/EL Rotator up with the Gulf Alpha Dual Band SAT antenna. Then I am done for a while.... Ya Right !!(y)
     

  2. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,832
    Likes Received:
    813
    If your results are as you say, then I would have to say that it's a definite improvement, right? So good, that's what matters.
    From that point, I think 'Buxcomm' plays a little fast-n-loose with what they are calling things versus what that antenna actually is, sort of. It's definitely off center fed, so it isn't a balanced antenna to start with. If the feed line is coax, then it definitely isn't a balanced feed line. So why use a 'balun'? It would make better sense to use an 'unun' (unbalanced antenna to unbalanced feed line), wouldn't it? But if it works, it works.
    The impedance transformation ratio, 1:1, 4:1, whatever, is never going to come out exactly right for all bands since all bands don't have a direct harmonic relationship. And, height and shape of the finished antenna (flat-top, bent, drooping, whatever) also have a part in determining the resulting input impedance. There's always some 'play' in that, make it 'better' if you can, don't worry about it much if you can't. If it works, it works.
    A true 'Windom' antenna uses a single conductor feed line and is 'worked' against ground as it's 'other half'. Very basically a vertical antenna with an odd shaped 'top-hat'. They require a very good ground system! Your antenna (the 'Buxcomm') isn't really a 'Windom', it's not using ground as it's 'other half'. If you don't look real closely, it certainly resembles one, but it really ain't what it looks like. (Sort of like 'silicon' and other 'shapes', you know? But if it works...?!)
    That's all sort of being 'picky' with definitions, but definitions really are important.
    - 'Doc


    (If it's better than what you were using, then it's an improvement! If not, then it's still interesting.)
     
  3. W1MSG

    W1MSG Now W1MSG

    Joined:
    May 9, 2010
    Messages:
    499
    Likes Received:
    18
    Thanks for the Info, I did do some research and pretty much found the definition a little off from Buxcomm but there are several others out there that fit the same bill with different explainations.

    It does work alot better and its been raining ever since I put it up, cant wait to see how it does when things dry up a bit.
     
  4. airplane1

    airplane1 W9WDX Amateur Radio Club Member

    Joined:
    Apr 15, 2005
    Messages:
    1,040
    Likes Received:
    20
    Sounds great, I am glad to hear it works better. Sounds like your station is comming along nice. Post pics for us.

    AP
     
  5. W1MSG

    W1MSG Now W1MSG

    Joined:
    May 9, 2010
    Messages:
    499
    Likes Received:
    18
    I am going to wait until the new SAT antenna and Rotator get here, and I get the tower installed. Hopefully the next two weeks and I will have it all done. About the same time my IC-7000 is due back from Icom.
     
  6. 941Texas

    941Texas Member

    Joined:
    Jun 30, 2009
    Messages:
    39
    Likes Received:
    1
    i have a homemade ocf with the 4:1 balun also. and just about the same hight. its a hard antenna to beat. the other day we put it up against a 20m delta loop and the loop lost, bigtime!! it also had out worked my 40 meter vertical with 36 radials. i didnt even wast my time with comparing my g5rv to it HI

    Carey
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!