Hello;

I too looked at this sketch
and after studying it found
it complex and difficult
to build. I was looking for
something much simpler with
easy to find parts.

Possibly The creator should
assemble the parts into a kit
and sell the kit but I bet it would
then not cost as cheap as you want.

It seems best to find a used professional geophone
somewhere because that is the only way
you will find one small and compact
enough to be easily transportable.

The creator of this mechanical circuit
seems quite talented and has the tenacity
to find the necessary raw materials.

If you are serious enough to recreate
this idea then I would be anxious
to hear your results in great detail.

I think Chris is the creator but not certain.

Regards;
gmvoeth

----- Original Message ----- 
From: "John Popelish" 
To: 
Sent: Wednesday, July 26, 2006 3:28 PM
Subject: Re: OT: an alternative use for a geophone


> Jerry Payton wrote:
>>   Nicholas Ward wrote:
> 
>>   Hi all,
>>   I'm just getting back to this now. I'm looking at building something
>>   based on Chris Chapman's piezo design from
>>   http://jclahr.com/science/psn/chapman/piezo/index.html
>>   I'm having trouble with the sketch however. 
> (snip)
> > Nicholas,
> >
> > I was able to save the drawing (JPG) and print it with a
> > Photoshop type program.  It was better, but not perfect.
> (snip)
> 
> I took a crack at cleaning up and shrinking this sketch and got it 
> down to a 58k gif.  I will be happy to email this file to anyone who 
> sends me a private email, asking for it.
> 
> And Chris, If you would like some drafting help making a more formal 
> drawing of this device, I can volunteer a bit of time.  But we should 
> do this off list, too, since it may take a bit of help from you, 
> before I get everything the way you want it.
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