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@earthlink.net>
To: "Robert Thain" <g0hgw@yahoo.com>
Cc: <towertalk@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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