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Re: ATU-10 kit or build - newdiytech.com website

 

I have build 49:1 using KN5L method on FT140-43, 2xFT114-43 and FT82A-43 all 28:4 turns. Each one has efficiency over 90%. I rewound all my EFHW QRP transformers and use KN5L method as standard.?
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