Re: Cutting the hole for a slide switch
This is indeed a useful tip: I've got a collection of old/scrap components like this which I use as templates.
Another useful tip: if you're throwing out an old, stripped-for-spares radio chassis, cut out the plate (a plunge-saw is ideal for this) that mounts the tuning-capacitor and keep it with the capacitor - then when you come to re-use said capacitor in some future project you've got the hole-drilling template ready and waiting.
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