PSN-L Email List Message

Subject: Re: Whip antenna
From: ChrisAtUpw@.......
Date: Sat, 5 Apr 2008 16:20:06 EDT


In a message dated 2008/04/05, tchannel1@............ writes:

> Hi Folks, If I had a 36" whip antenna, just a piece of spring steel rod, 
> with a small mass on the tip, how much would the tip move during a earthquake?

Hi Ted,

       The mass should ideally NOT move at all ! It is the Earth which moves. 
See the graphs at http://jclahr.com/science/psn/magnitude.html for actual 
amplitides of phases.

       Regards,

       Chris Chapman   
In a me=
ssage dated 2008/04/05, tchannel1@............ writes:

Hi Folks, If I had a 36" whip a= ntenna, just a piece of spring steel rod, with a small mass on the tip, how=20= much would the tip move during a earthquake?


Hi Ted,

       The mass should ideally NOT move at all= ! It is the Earth which moves. See the graphs at http://jclahr.com/science/= psn/magnitude.html for actual amplitides of phases.

       Regards,

       Chris Chapman

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