What do these do?

So I found a few transistor doohickeys, and I was wonderin' if any of you fine folks knew where I culd find a use chart or some such, like the NJ7P of little chips. Each one has a different number on it, but I'm hittin' a blank wall tryin' to search by number.

Any help greatly appreciated.

they looks like the originals transistors in BIG MUFFs

What are the markings on the devices?

Well, like I said, for all I know these are the flux capacitors from an ice-machine, but here goes:

f748 16 944
f587 949
f722 935
f699 16 937
499 M 944 (the "M" actually looks like a motorola logo, though it's freekin' tiny)

Are the different shapes indicative of anything?

Can any little transistor like these be used for fuzz, or were some built to make coffee, others for tank turn signals, etc?

That's like asking what a nut or a bolt are meant to be used for. The same exact thing can be used in many different places. It's not a matter of what it's designed to be used in, but rather what it can be used in.

OK, the interest in "what it was designed for" is primarily a question of personal curiousity--I think it'd be fascinating to know, but it is secondary to the reason I'm here, in the home-made effects pedal section of the TDPRI:

Are these something I can use to make a stompbox? Any help would be appreciated.

Oh! My Ice Machine's Flux just died last month! I'll take'em! I've really missed my 50's ice... ah-hem... :lol:

OK, so nobody out there can tell me about a resource to try and figger out what these do?

You can use a curve tracer to get the VI curves. From there, you can figure out their gain, etc., and determine whether or not they'll work for an effect you have in mind.

In all honesty, it's easier to just toss them and buy some known BJTs for your project. They're going to be pennies each... well, $0.50 each in single quantities.

Ok, so they're not exactly worth anything on the vintage market, and as unknowns, with little hope of tracing their origins, slim chance of them being of any use to me.

Any reason I can't just drop 'em in a fuzz circuit and see what happens? Any chance they'll blow something up, like I just plugged into 240 or something?

Thanks for the input, tho.

You need one of these:

http://www.peakelec.co.uk/acatalog/jz_dca55.html

OK, clearly, just buying some known fuzz tranzizters would be cheaper than that, though if I had a whole drawer full, it might be a different story.

Thanks, though.