Message-ID: <001a01c2f7c3$800834a0$92e086d4@erica>
From: "g3ldo" <g3ldo@ukonline.co.uk>
To: rsgb_lf_group@blacksheep.org
References: <000501c2f7a3$1f8d9ea0$07d2fc3e@ian> <003101c2f7b3$1954f500$cbe8fc3e@l8p8y6>
Date: Mon, 31 Mar 2003 21:17:04 +0100
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Subject: LF: Loading coils
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> NEVER put your loading coil in a metal box, it totally destroys the
> efficiency. Consider it as part of the antenna from the radiation point of
> view. You have never seen a loading coil on a Mobile encased in a metal
CAN,
> the coil contributes to the over all efficiency ie coil plus whip.
> I have seen reference to encasing the loading coil here on this reflector
> that is why those signals are poor.
> My coil sits outside exposed to the elements and does not seem to be
> effected by changing wx, neither does the amps vary whether it be dry or
> wet. Recent info on here suggests heating the loading coil to increase the
> amps consumed, if this is the case the coil wire, insulation etc is very
> suspect.
> I change my antenna wire and rewind a new coil at least once a year. I
also
> check the insulated radials and change if necessary.
> Try a turkey next Xmas without the FOIL, Foil is nether good for antenna
> coils or Turkeys
> 73 de Mal/G3KEV

The loading coil complex used by the Decca stations were located in a small
concrete building. In the early days I understand that there were problems
until the whole building was lined with copper - in other words a screened
box.
This screened box was also electrically heated.

It is obvious that these Decca design engineers didn't know what they were
talking about.

Regards,
Peter, G3LDO

e-mail <g3ldo@ukonline.co.uk>

Web <http://web.ukonline.co.uk/g3ldo>