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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