Martin McCormick wrote:

>"David VanHorn" writes:
>  
>
>>Screams "CRYSTAL" to me.. Stick it in a crystal oscillator circuit and
>>see what happens.
>>    
>>
>
>	Thanks. The 16-meg crystals I have that look like this
>have no lead in the center but would be those same packages if
>they did.
>
>  
>
>>The metal cans on crystals really should be grounded, but many choose
>>not to do that.
>>    
>>
>
>So much trouble, you know, one lead and a drop of solder.
>
>Martin McCormick
>  
>
Since you originally stated the parts were on a computer peripheral 
board, it's a safe bet they are crystals.  If they are on something 
communications related, they could also be crystal filters, usually with 
pin 1 as input, center is ground and pin 3 is output.  You can find the 
center frequency by using a function generator.
Bill
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