In a message dated 17/09/00 03:58:08 GMT Daylight Time, RADIOTEL@....... 
writes:

> TO: ALL
>  MAXIM has a 5 pole Bessel analog filter (Part # 7409)  which is an 8 pin 
dip  
>  package which operates with 5 volts.  Since they only require several 
>  additional components (resistor and two capacitors) to operate, they would 
>  appear to be useful for a seismograph.
    
    The temperature output offset drift Spec doesn't look very good at ~ +/- 
0.1 V over the ambient range and I'm not over enthusiastic about 5 mV clock 
feedthrough. 1 Hz is right on the bottom of it's range. Might be OK, but it 
needs to be checked out carefully.

    Regards, 

    Chris Chapman
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