F4EGX FT817 tuner box
thingiverse
This is a DIY kit for an antenna tuner that you can download the datasheet from here. https://app.box.com/s/so3ov9b0zjsz3dysj1s9/1/1331269728/11820041217/1 http://m1kta-qrp.blogspot.com/2014/05/comments-on-chinese-atu.html Alternatively, you can buy a kit on eBay or from another seller, "QRP manual days Antenna Tuner DIY Kit 1 - 30 Mhz For HAM RADIO". I added an antenna centre and a 1:1 balun inside. https://www.sotabeams.co.uk/antenna-centre-1-1-balun/ The datasheet is here: https://www.sotabeams.co.uk/content/HF%20Balun%20Kit%20Instructions.pdf The thing isn't perfect, so you'll need to carefully adjust the screw holes for M3 tapping. 73 F4EGX
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