Thanks Thomas Dick for your question regarding whether I was using the =
64 bit or 32 bit on a like bit computer. However,  I followed =
Larry=E2=80=99s advice and used the 32 bit WinSdr on my 64 bit computer =
and it worked.  I do appreciate your question since at my age I do tend =
to confuse things.
James

From: Bob McClure=20
Sent: Friday, February 17, 2012 9:13 AM
To: psnlist@.................
Subject: Re: Damping Test Device

Hi Geoffry,=20


  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 ?




Thanks Thomas Dick for your question regarding whether I was using =
the 64=20
bit or 32 bit on a like bit computer. However,  I followed =
Larry=E2=80=99s advice=20
and used the 32 bit WinSdr on my 64 bit computer and it worked.  I =
do=20
appreciate your question since at my age I do tend to confuse =
things.
James


 

From: Bob McClure 
Sent: Friday, February 17, 2012 9:13 AM
To: psnlist@.............. 
Subject: Re: Damping Test Device
 
Hi Geoffry,=20


  I wrote the page http://www.jclahr.com/science/math/calculators/scientific_calcu=
lator.html=20
using a formula supplied by the late (and revered) John =
Lahr.


It features a calculator =
which can=20
compute sensor damping or Q based on the amplitude of successive peaks =
in the=20
sensor impulse response. Use "STO1" and "STO2" keys to enter your input =
numbers.=20
Both numbers should be positive, even though the actual values have =
opposite=20
sign. Be careful not to let any amplifier bias affect your measurement =
of=20
amplitudes.


  When 1.0 is entered =
into=20
register 1 at the bottom, and 0.1 into register 2, the resulting damping =
is=20
0.5911550337988976 and=20
the corresponding Q is 0.8458018140975397.


  I test my sensors in a similar manner. I charge a 0.03 mf =
capacitor=20
to 5 volts and discharge it across the amplifier input terminals.


Bob


On Thu, Feb 16, 2012 at 9:13 PM, Geoffrey <gmvoeth@.........>=20
wrote:


  
Can someone here point me to a formula which =
converts
the 1:10=20
  ratio to a damping number relating to 1.0
which is the calculated =
CDR of=20
  1179 Ohms for this
HS10-1 geophone ?