[TowerTalk] Step-down balun 12.5-50ohm

[W5CPT]

Robert,
If you are looking to have the balun built got to:

http://www.balundesigns.com/servlet/StoreFront

He can build anything you want reasonably.

I have no pecuniary interest in the company, just a satisfied user.

Clint - W5CPT

  ----- Original Message ----- 
  From: Robert Thain 
  To: towertalk at contesting.com 
  Sent: Thursday, August 20, 2009 5:14 PM
  Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm


  Hi,
  Yes exactly, 

  I'm looking for 50ohm unbalanced to 12.5ohm balanced. 

  Thanks
  Robert G0HGW

  (ps sorry I can't how to reply to a message)



  Message: 11
  Date: Thu, 20 Aug 2009 13:57:58 -0500
  From: "Perry - K4PWO" <k4pwo at comcast.net>
  Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
  To: "jimlux" <jimlux at earthlink.net>, <towertalk at contesting.com>
  Message-ID: <DFFC789D36F34153B3B0B427DC8E6730 at svr>
  Content-Type: text/plain; format=flowed; charset="iso-8859-1";
  reply-type=original

  Just flipping the balun might not work as the Hi-Z side is balanced and the 
  Lo-Z side is unbalanced. Just the reverse of what he probably needs.

  73 de Perry - K4PWO

  ----- Original Message ----- 
  From: "jimlux" <jimlux at earthlink.net>
  To: "Robert Thain" <g0hgw at yahoo.com>
  Cc: <towertalk at contesting.com>
  Sent: Thursday, August 20, 2009 13:48 PM
  Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm


  > Robert Thain wrote:
  >> Hello,
  >>
  >> I'm looking to build a Step-down balun 12.5-50ohm ie input with 50ohm 
  >> coax and output to 12.5ohm wire.
  >>
  >> Can any one point me in the right direction for a plan. I know they exist 
  >> I've seen them for sale.
  >>
  >> I have bought a 1:4 50ohm - 200ohm balun, but I think I've messed up, 
  >> its the "wrong way around".
  >> I hope I can use it for parts.
  >>
  >> Thanks
  >
  > both of those are 2:1 turns ratio. You just need to flip it around. For
  > your application, the coax (50 ohm side) goes to the winding with more
  > turns.
  > _______________________________


        
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