In a message dated 2007/07/26, tchannel1@............ writes:


> So why not chop a few turns off the spring? ! Maybe make two, with half 
> length springs?...........I could have, but gathering the loops aloud me to add 
> and subtract to adj the length.

Hi Ted,

       Trim the extension by adding mass, eg large diameter washers?

>  >Have you tried putting thermal insulation around the tube?  ..........I 
> could, but the room is temperature stable, so I have not.

       I suggest that you try it sometime? Maybe just wrap / hang a rug or a 
blanket around it for a rough test?
       It is likely to significantly reduce the noise. 
       Does the increased daytime noise on the vertical correlate in time 
with the noise levels on the Lehman?

       Regards,

       Chris Chapman   
In a me=
ssage dated 2007/07/26, tchannel1@............ writes:





So why not chop a few turns off=
 the spring? ! Maybe make two, with half length springs?...........I could h=
ave, but gathering the loops aloud me to add and subtract to adj the length.=




Hi Ted,



       Trim the extension by adding mass, eg l=
arge diameter washers?



 >Have you tried putting the=
rmal insulation around the tube?  ..........I could, but the room is te=
mperature stable, so I have not.




       I suggest that you try it sometime? May=
be just wrap / hang a rug or a blanket around it for a rough test?

       It is likely to significantly reduce th=
e noise. 

       Does the increased daytime noise on the=
 vertical correlate in time with the noise levels on the Lehman?



       Regards,



       Chris Chapman