I think a picture would definately help...

Ian

tchannel1@............ wrote:

> Hi All,  I am now testing the PMG  Paper mate Lubriglide, SENSOR,   
> This took well over a hour and I did not have to go to the hardware 
> store once.
>  
> My camera battery is down, but if someone would like some picts just 
> email me.  I know a pict is worth a thousand words, but I will try to 
> describe it.
>  
> 1.  I use a 1/8" x 36" wood dowel, taped a Paper-Mate pen refill to 
> it, ball end up.
> 2.  I use a camera tripod, and attached a rare earth magnet to the 
> handle of the tripod, (the tilting handle which is steel). Using the 
> crank on the tripod I can raise and lower the dowel.
> 3.  I found a small steel nut which I could thread onto the dowel, a 
> washer on top of the nut, then a larger hex nut, about 1/4" 20 
> thread. on top of the washer.
>  This created a base for two bar magnets,(the washer) and a shoulder 
> for the ends of the  magnets.(the larger nut)  So left to right= 
> magnet+nut+magnet   The small nut and washer supports the magnets so 
> they don't fall down the dowel.
> By threading the small nut and washer up and down the dowel you change 
> the magnets height.
>  
>  4. I used two small bar magnets, 1/4" x 1/2" x 1" 
>  
>  I turned the crank on the tripod lowering the two magnets to within 
> 1/16" above the coil. ( Coil laying flat, dowel passing thru center 
> hole, of the coil spool, two bar magnets, left and right= N and S, 
> just above the plastic coil spool.)   This also lowered the end of the 
> dowel deeper into the oil.
>  
> 5.  I laid the  doe nut shaped coil, laying flat, on top of a small 
> plastic cup, filled will oil as a damper.
>  
> 6.  The dowel passes thru the coil spool and extends into the oil.  I 
> did not use a paddle on the dowel, it seems to damp well by adding 
> more oil.
>  
> The coil I got from friend Jerry, which is 6000? turns of 28ga.
>  
>  
> Using Larry's board and the DataQ, its producing a very nice signal.   
> I placed the whole thing in a 5 gallon bucket and covered the top of 
> the bucket with towels to isolate most of the parts, from air 
> currents.   The ball point pen and the top 20" of the dowel are exposed.
>  
> The signal looks strong, I turned the gain on AmaSeis down to 2, which 
> is about what I use on other sensors.
>  
> Not a high tech sensor, but I am going to record some earthquakes and 
> see how they look.........if we get some earthquakes.
>  
> Thanks everyone.
> Ted


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I think a picture would definately help...



Ian



tchannel1@............ wrote:


  
  
  
  
Hi All,  I am now testing the PMG 
Paper mate Lubriglide, SENSOR,   This took well over a hour and I did
not have to go to the hardware store once.
  
 
  
My camera battery is down, but if
someone would like some picts just email me.  I know a pict is worth a
thousand words, but I will try to describe it.
  
 
  
1.  I use a 1/8" x 36" wood dowel,
taped a Paper-Mate pen refill to it, ball end up.
  
2.  I use a camera tripod, and
attached a rare earth magnet to the handle of the tripod, (the
tilting handle which is steel). Using the crank on the tripod I can
raise and lower the dowel.
  
3.  I found a small steel nut which
I could thread onto the dowel, a washer on top of the nut, then a
larger hex nut, about 1/4" 20 thread. on top of the washer.
  
 This created a base for two bar
magnets,(the washer) and a shoulder for the ends of the  magnets.(the
larger nut)  So left to right= magnet+nut+magnet   The small nut and
washer supports the magnets so they don't fall down the dowel.
  
By threading the small nut and
washer up and down the dowel you change the magnets height.
  
 
  
 4. I used two small bar magnets,
1/4" x 1/2" x 1" 
  
 
  
 I turned the crank on the tripod
lowering the two magnets to within 1/16" above the coil. ( Coil laying
flat, dowel passing thru center hole, of the coil spool, two bar
magnets, left and right= N and S, just above the plastic coil spool.)  
This also lowered the end of the dowel deeper into the oil.
  
 
  
5.  I laid the  doe nut shaped coil,
laying flat, on top of a small plastic cup, filled will oil as a damper.
  
 
  
6.  The dowel passes thru the coil
spool and extends into the oil.  I did not use a paddle on the dowel,
it seems to damp well by adding more oil.
  
 
  
The coil I got from friend Jerry,
which is 6000? turns of 28ga.
  
 
  
 
  
Using Larry's board and the DataQ,
its producing a very nice signal.   I placed the whole thing in a 5
gallon bucket and covered the top of the bucket with towels to isolate
most of the parts, from air currents.   The ball point pen and the top
20" of the dowel are exposed.
  
 
  
The signal looks strong, I turned
the gain on AmaSeis down to 2, which is about what I use on other
sensors.
  
 
  
Not a high tech sensor, but I am
going to record some earthquakes and see how they look.........if we
get some earthquakes.
  
 
  
Thanks everyone.
  
Ted



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