[Test-Equipment] Make your own coil dope

[mikea]

On Fri, May 29, 2009 at 11:19:52AM -0700, davec wrote:
> Why not just use epoxy or such?
> 
> Just curious what is special about the "coil dope".

"Traditionnnnnnnnnnnnnnnnn!

         Traditionnnnnnnnnnnnnnnnnnn!" 

Also, polystyrene coil dope has very low RF absorption, way up into the
near-daylight region of the spectrum. With store-bought epoxy, you don't
necessarily know how it will behave at, say, 6m or 23 cm or wherever you
choose to generate or receive your signal. With coil dope, you do,
because as soon as all the solvent evaporates, you've got polystyrene,
which is very much a known (and well-behaved) quantity.

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin