On Saturday, Geoff Typed:

Mucho Gracious Senior Bob.

> Hi Geoffry, 
> 
> 
>   I wrote the page http://www.jclahr.com/science/math/calculators/scientific_calculator.html using a formula supplied by the late (and revered) John Lahr.
> 
> 
> It features a calculator which can compute sensor damping or Q based on the amplitude of successive peaks in the sensor impulse response. Use "STO1" and "STO2" keys to enter your input numbers. Both numbers should be positive, even though the actual values have opposite sign. Be careful not to let any amplifier bias affect your measurement of amplitudes.
> 
> 
>   When 1.0 is entered into register 1 at the bottom, and 0.1 into register 2, the resulting damping is 0.5911550337988976 and the corresponding Q is 0.8458018140975397.
> 
> 
>   I test my sensors in a similar manner. I charge a 0.03 mf capacitor to 5 volts and discharge it across the amplifier input terminals.
> 
> 
> Bob
> 
> 
> On Thu, Feb 16, 2012 at 9:13 PM, Geoffrey  wrote:
> 
>   Can someone here point me to a formula which converts
>   the 1:10 ratio to a damping number relating to 1.0
>   which is the calculated CDR of 1179 Ohms for this
>   HS10-1 geophone ?
> 
__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

To leave this list email PSNLIST-REQUEST@.............. with 
the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.