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What balun or unun for these vertical antennas?

Discussion in 'Amateur Radio Antennas' started by Moleculo, May 4, 2012.

  1. Moleculo

    Moleculo Administrator Staff Member

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    I saw this portable vertical antenna on ebay and am thinking about building one for myself:

    PROWHIP PORTABLE HF ANTENNA, 160M - 6M , hieght 10M | eBay

    I believe with these antennas they're using an UNUN, to get it to load up 160-6m right? Does anyone directions on how to build it properly?


     
    #1
  2. KC9Q

    KC9Q Supporting Member

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    Here's a web site that shows the winding method.

    http://www.angelfire.com/electronic2/qrp/unun.html

    However for high power use 14 bifilar windings of #14 insulated wire on a FT240-K core. If you need to; connect any ground radials to the SO-239 shield side.

    That should do it.
     
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  3. hookedon6

    hookedon6 W9WDX Amateur Radio Club Member

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    I "think" these are made by G7TAS
    www.prowhipantennas.co.uk/
    and use his 400 wattbalun
     
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  4. W5LZ

    W5LZ Crotchety Old Bastard

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    For multiband use, those baluns/ununs better be adjustable...
    - 'Doc
     
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  5. WD4FCJ

    WD4FCJ W9WDX Amateur Radio Club Member

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    vertical antenna

    looks like the one i built. only mine is 10 thru 40 meters. a fiberglass telescopic shaft with a 23 ft wire inside and a 4:1 balun. matching radials. some say radials are not not nec. but i am getting very good results with radials.. check out this link for a 4:1 balun. easy to make..about $10.00 us dollars
    RogerTango.com - Build a 4:1 voltage BALUN
     
    #5
: balun, unun

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