[SAC-HELP] polezero file for Milne-Shaw historical instrument

[Caroline Holden]

Hello,

could you please let me know what would be the sac polezero file for a 
Milne-Shaw instrument with the following characteristics:
Seismometer period Ts=12 
Damping ratio 20:1
Magnification 250

Thank you very much for your help! 

Caroline

PS: my guess is:

Zero 2
poles 2
-0.3613  0.3790
-0.3613  0.3790
Constant 250*2*pi

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