I've been on vacation so I hope it isn't too late to
respond.

I'd be interested io particpiating in a group purchase.
I've been too busy (or lazy) to build my own device.

I'm more interested in the 1hz device, but if the group
wants 4.5hz I'm still interested.

Terry


Larry Cochrane wrote:
> 
> Hi All,
> 
> I have been working with a new PSN member who would like to set up his own
> station. He lives here in N. California. Too start with he is only
> interested in local events. Since he doesn't have the time to build his own
> senor, I offered to look for a geophone for him.  I have contacted R.T.
> Clark and Mitcham Industries for quotes for a 1 hz or 4.5 hz geophone. R.T
> Clark is offering the following:
> 
> Mark products L-4C, 1 hz seismometer      $375.00
> Connecting cable                                          $75.00
> (the connecting cable cost is a little high in my opinion )
> 
> and Jim at Mitcham Industries sent me this:
> ------
> I'll take $300.00 for a 1 Hz phone.  $55.00 for a single 4.5 Hz.
> 
> It's hard for me to sell these one at a time.  You can have 10 of the 4.5's
> for $375.00.  Or 5 ea. 4.5's and one 1 Hz for $475.00.
> 
> The 1 Hz is Geospace HS-10-1 single vertical geophone in aluminum case and
> no spike (smooth bottom) with coil position indicator.  It has about a 2
> meter lead with alligator clip connectors.  It weighs about 9 pounds.
> 
> The 4.5 Hz is Mark Products L10B single vertical geophone in aluminum case
> with 2 3/4 inch spike,3 foot lead and Amphib IV connector.  They have a
> shunt resistor soldered across them for approximately 60% damping.
> ------
> 
> Jim at Mitcham Industries has contacted me before about having to sell one
> unit at a time too our members. Since I don't have the free $$$ to stock
> sensors, I offered to see if we could get together a group buy.
> 
> So I have a few questions...
> 
> 1:  Is there much difference between L-4C and the HS-10-1 and would the
> extra 75.00 be worth the money?
> 
> 2:  Anyone interested in a group buy?
> 
> 3:  Does anyone have a sensor, or a source for a sensor, that Doug (the
> person I'm working with) could buy?
> 
> Thanks,
> 
> -Larry Cochrane
> Redwood City, PSN
> 
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-- 
Terence Dowling             (408) 536-3856
Adobe Systems Inc.          dowling@.........

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