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This looks like a cool way to prototype using SMD parts: https://www.g8jnj.net/SMD%20PCB.png
He’s using kapton tape stuck on a PCB as a heat-proof mask, then sticking copper tape on top of that to make interconnects.
This gem popped up on RSGBTech in the midst of a discussion of the current Amateur Radio exams! https://groups.io/login?r=%2Fg%2FRSGBTechnical%2Fmessage%2F48564