Here is a homebrew sine square wave generator from 1972 made by MJ,
that is all i could find inside, really funny design, looks a bit like it is a first timer, so before judging anyone.. remember your first unit ?
see also a DIY powersupply 1979 made by the same MJ :
   • Video  
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#diyelectronics
#teardown
#repair
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I use auto generated subs, I go through them myself, but i am far from perfect at finding all errors, so if you find errors worth fixing, please comment (or PM) with the TIME in the video you saw the error, i will be happy to fix it. This also applies to the Danish version.
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(Thanks to all my Sponsors / Traders / Swappers / Sellers / Buyers, without your support and constant flow of cool items in/out, none of this would be possible)