[Boatanchors] Coils and the winding thereof

[match at ece.utah.edu]

On 2 Jul 2009 at 12:12, Carl wrote:

> Any heat signifies loss which may affect performance by reducing the Q.
> 
> Look for a material that stays at room temperature.
> 
> However the microwave doesnt test for long term moisture absorbtion in a one 
> shot try.
> 
> Carl
> KM1H

True, but that's a related issue and not "the" issue. Long-term moisture 
absorption is dependent upon how you make the form and what materials 
you make it out of. 

For example, I "think" shelac will absorb moisture, but I don't "think" spar 
varnish does (anyone know for sure?). Therefore, if the strips of newspaper 
are saturated with varnish, I don't think it will be absorbing moisture, long 
term or otherwise.

Either way, I think we're truly splitting hairs here. I would really be surprised if 
coil forms made this way were lossy enough to notice.

Marvin
KA7TPH