Hi Mal!
As far as I understood it is regarding 137 (= LF) but meanwhile I'm not
sure either....
73 es looking forward to a QSO on LF!
OE3GHB
Gerhard
Am Freitag, den 12.11.2010, 22:16 +0000 schrieb mal hamilton:
> What frequency are you discussing ?
> g3kev
>
> ----- Original Message -----
> From: "Gerhard Hickl" <[email protected]>
> To: <[email protected]>
> Sent: Friday, November 12, 2010 9:17 PM
> Subject: Re: LF: LF Coils
>
>
> > Hi Ken!
> >
> > It all depends on the antenna your are going to feed with this loading
> > coil. My system has a capacitive load of abt. 600pf and so the coil is
> > abt. 2,3mH. This is realized on a flower pot with about 40cm diameter,
> > 80 turns of insulated wire. The height of the pot is only 30cm.
> >
> > If you have a smaller capacitive load, you'll need more inductance and
> > thus increasing the diameter of the coil-body.
> >
> > If you count 6pf per meter for every vertical part of your antenna and
> > 5pf/m for every horizontal part, you can estimate the capacitive load
> > very well. For calculation of L and C for a given frequency or for
> > dimensioning air-coils (Luftspulen), I can recommend the
> > "Mini-Ringkernrechner"...
> >
> > http://www.dl5swb.de/html/mini_ringkern-rechner.htm
> >
> > I don't remember if there's an option for the language on installation
> > but even if it's only in German, it easy to operate.
> >
> > 73
> >
> > OE3GHB
> > Gerhard
> >
> >
> >
> >
> >
> > Am Donnerstag, den 11.11.2010, 20:28 +0000 schrieb Ken:
> > > Hello Everyone.
> > > I went into a branch of Wilkinsons (Watford), today, and saw some
> > > straight sided cylindrical dust bins about 0.5m diameter, useful for
> > > large coils?
> > >
> > > 73
> > > Ken
> > > M0KHW IO91TV
> >
> >
> >
>
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