[sdiy] The vagaries of identifying parts scavanged...

[Noah Vawter]

Funny story: when I was an undergrad I used a blowtorch to remove a large number of 74xx components from several 18"x36" circuit boards.  It was definitely overkill.  

AA, do you have some tips for people who want to take apart circuit boards easily to get components?  


On Sep 10, 2011, at 12:04 PM, aankrom wrote:

> Desoldering a part from a circuit board is only half the job. Well except when you remove parts that you already KNOW what they are.
> 
> I always like finding the odd FET. Lately I have been finding 2SK202's. Wonder how they'd perform with audio... Anyway, I was taking apart a tape deck with several "1212's" & "1202's", my immediate thought was some sort of pre-biased transistor (and I was right), but to really know what you have, it's good to hunt for a datasheet. But alls I have is a number. What prefix to start with? Well I usually just start with the numbers using datasheetcatalog.com. But you can get a heap of hits that way. You can try to guess 2SC or even something like "KTC". Today I discovered a new prefix to try: "SRC", made my Auk.
> 
> I used to throw out pre-biased transistors, until I began to find them in schematics for projects I wanted to build. Fortunately for me, "throw out" means I just chuck 'em in a big coffee can instead of a little plastic drawer.
> 
> Sometimes to identify parts I have to resort to looking them up in my old hardcopy NTE book or my VERY old hardcopy SK book. (Came in real handy for a bunch of RCA "Dynascan" parts beginning with "307-" 'What? It's just a 4030? a 4016? a CA3130?...')
> 
> AA
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Noah Vawter
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