Michael Stapelberg @zekjur says:

This soldering reference card from @adafruit is the most to-the-point explanation of good soldering practices I have ever seen:

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Garrett  @creatosaurus

Replying to @zekjur @konypyon @adafruit 
For anyone who wants a ridiculously comprehensive video series on soldering: youtu.be/vIT4ra6Mo0s

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Laselki.net   @LASELKI

 FT8 Operating Guide by ZL2IFB dlvr.it/QBJ3hn

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