Hi Chris,

On Dec 12, 2007 5:35 PM,  wrote:

>   In a message dated 12/12/2007, paleoartifact@......... writes:
>
> I've tried both your ideas of copper sheet and pencil leads, in a
> different (unintentional) diamagnetic
> levitation variation model and thus far the results have been noteably
> quite useful.
>
>  Hi Meredith,
>
>     I have also used D shaped pencil leads. I stick some say 32 thou sheet
> onto a flat backing plate with double sided tape, apply the round lead to
> the L edge of the plate and then sand off the top with new emery paper on a
> flat backing plate. You can 'roll' the lead carefully off the sticky tape
> when you have finished sanding. If you have any problems, heat from a hair
> drier can help a lot.
>

**** The above would help in the glueing aspect of course.  Its difficult to
maintain close size/sanded consistency.

>
>     You would likely get quite strong damping if you made the Cu end foils
> wider so that they overlapped the end magnet + 1/2 the outside magnets?  The
> field gradients should be considerable here?
>

**** Yes, indeed with adding 1/2" wide copper foil the dampening is variable
and including up to overdampened.  I removed the extra
two end magnets and tried using foil only one end and even that is quite
sufficient.  This likely means that the "open end" could bear a optical flag
eventually.

>
>     Have you suffered from freezing rain in Denver? There have been some
> very catastrophic looking pictures on TV. The last time we had this problem
> was back in the 1940s.
>

**** No ice buildup like they got in Kansas afew days back.  Perhaps 8" of
snow over a weeks time.  Nebraska got it bad ~ last December or so, with
ice; as, it toppled even fences with ~ 1" thick ice over single strand fence
wire.  Massive power outages & etc.


>
>     The two part acrylic glue is very good for sticking carbon. Devweld
> 530 should be available to you in twin tubes? I use Holdtite 3295.
>

**** Think I'll try 3m scotch-weld DP810 structural 2 part acrylic adhesive;
at least that I can get locally initially.  I envy your european
glues.....they have a number of really excellent glues that are vastly
superior to likely any common American brands.

>
>     Hope that you are all well!
>

**** We're doing as well as we can under the circumstances.  Hope your
health is fine also!
Take care, Meredith

>
>     Regards,
>
>     Chris
>
>
Hi Chris,


On Dec 12, 2007 5:35 PM, <ChrisAtUpw@.......> wrote:





In a message dated 12/12/2007, paleoartifact@......... writes:

I've tried both your ideas of copper sheet and pencil leads, in a different (unintentional) diamagnetic 
levitation variation model and thus far the results have been noteably quite useful. 

Hi Meredith,
 
    I have also used D shaped pencil leads. I stick some say 32 thou sheet onto a flat backing plate with double sided tape, apply the round lead to the L edge of the plate and then sand off the top with new emery paper on a flat backing plate. You can 'roll' the lead carefully off the sticky tape when you have finished sanding. If you have any problems, heat from a hair drier can help a lot. 

 
**** The above would help in the glueing aspect of course.  Its difficult to maintain close size/sanded consistency.



 
    You would likely get quite strong damping if you made the Cu end foils wider so that they overlapped the end magnet + 1/2 the outside magnets?  The field gradients should be considerable here?

 
**** Yes, indeed with adding 1/2" wide copper foil the dampening is variable and including up to overdampened.  I removed the extra
two end magnets and tried using foil only one end and even that is quite sufficient.  This likely means that the "open end" could bear a optical flag eventually.  



 
    Have you suffered from freezing rain in Denver? There have been some very catastrophic looking pictures on TV. The last time we had this problem was back in the 1940s. 
 
**** No ice buildup like they got in Kansas afew days back.  Perhaps 8" of snow over a weeks time.  Nebraska got it bad ~ last December or so, with ice; as, it toppled even fences with ~ 1" thick ice over single strand fence wire.  Massive power outages & etc.

 



 
    The two part acrylic glue is very good for sticking carbon. Devweld 530 should be available to you in twin tubes? I use Holdtite 3295.
 
**** Think I'll try 3m scotch-weld DP810 structural 2 part acrylic adhesive; at least that I can get locally initially.  I envy your european
glues.....they have a number of really excellent glues that are vastly superior to likely any common American brands.   



 
    Hope that you are all well!
 
**** We're doing as well as we can under the circumstances.  Hope your health is fine also!
Take care, Meredith



 
    Regards,
 
    Chris