Topband: Unun help

["Gavin Taylor GM0GAV" <gavin@hfdx.co.uk>]

I want to construct an Unun for my inverted L. It is sitting at 23 ohms, so a 
2.25:1 would be ideal.
I have a FT-240-K core. Anybody used this core for a topband Unun, is so how 
many trifilar turns and what size of wire? I was going to try 7 turns #14.

Any words of wisdom much appreciated!

73 Gavin
GM0GAV
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