Hello Larry,

Last year I took out one of the circuits off my L4 because by my
calculations and the sec sheet and I think it significantly changes the
damping.  As I recall it drops it to .5

I think changing the resistor on the board is much better.

I could be all wrong on that too!

angel

Wednesday, January 09, 2002, 5:39:46 PM, you wrote:

LC> Francesco,

LC> See the following schematic http://www.seismicnet.com/onlinedocs/voltdrop.gif on how to lower the input voltage to the Amp/
Filter board.

LC> -Larry Cochrane
LC> Redwood City, PSN
LC>   ----- Original Message ----- 
LC>   From: Francesco 
LC>   To: psn-l@.............. 
LC>   Sent: Wednesday, January 09, 2002 4:13 AM
LC>   Subject: MARK SENSOR


LC>   Hi to all
LC>   from some weeks I'm using in my station 3 Mark L4 sensors with Larry's ampli board.
LC>   The output signal is very high, and a small events also near me saturats the amplitude.
LC>   The gain is at min.

LC>   What I do to resolve this problem?

LC>   In another station of our network, we use the Mauro Mariotti's ampli board with the input resistor of 22k and all works f
ine.

LC>   Can I do the same change?

LC>   regards

LC>   Fraancesco     Italy



-- 
Best regards,
 angel                            mailto:angel@............

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)