I found 3 of these on a P.C. peripheral adaptor I was salvaging
that had maybe 2 serial ports on it.

	The cans are oval just like a single quartz crystal can
but squatty like some 16-meg crystals I bought from Jameco a few
years ago. these cans have a combination of numbers and letters
that appear to be a part number rather than a direct frequency.

	There are 3 leads on the bottom and the middle lead is
grounded to the case.

	I am guessing they are just crystals with a grounded
case but they could also be a full Can oscillator although those
are usually about the size of a 14 or 16-pin DIP IC package with
a pin or 2 at each corner.

	I almost forgot. On the bottom, one end of the package
is rounded like the rest of the case but the other end has one
square corner as if to mark orientation. If it is a crystal,
orientation wouldn't matter as long as the center terminal was
grounded.

	When I am trashing old mother boards and adapters, I
usually yank all the 	EPROM's, jumpers and crystals/can
oscillators if practical to do so because they can be reused.
The same is true with cables and connectors especially those
ribbon jumpers that go from DB9's and DB25's to headers.
Someone's already done half of a future job for you.:-)

Martin McCormick WB5AGZ  Stillwater, OK 
Systems Engineer
OSU Information Technology Department Network Operations Group
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