Re: 'Spirits of Salts' as soft solder flux?
The first time I came across this term was when an elderly friend, ex RAF, and now departed, explained to me how he made a radio whilst in a POW camp during WW2. Amazing how resourceful some of these guys were.
He assisted the Camp Dentist so was able to export!! a few items including some Hydrochloric Acid which he mixed with Vaseline, that came in the Red Cross parcels, to make a soldering flux.
Denis
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If you take something apart often enough, eventually you'll have two of them....
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