Next message: Pilgrim: "Re: lv-ab: Inverters... pure sine or modified?"
But where is it written that you actually need 4 square inches of surface
area inch of length?
1/4 square inch may be more than adequate for a small SSB transmitter.
With a stranded or woven cable about 8 gauge you get the surface area of the
strands and it is much more compact, insulated and easier to install.
Regards,
Andina Marie Foster,
----- Original Message -----
From: "Pilgrim" <>
To: <>
Cc: <>
Sent: Tuesday, August 10, 2004 8:18 PM
Subject: Re: lv-ab: SSB Ground plane
> wrote:
>
> > Round wire will work OK for the ground wire. They do recommend a flat
strip
> > but I'm fairly sure the difference is quite minor.
> >
>
> Time for a bit of math
> 1. RF only uses the surface of a conductor and is therefore dependent
> only on the surface area of the conductor
> 2. The surface area of a unit length of wire is "pie" x D or 3.14 * wire
> diameter
> 3. The surface area of a unit length of strap is (2x(width+thickness))
> 4. Assume that you use a 2 inch strap of 22 guage .. you can ignore the
> contribution of the thickness but for a 1 inch length you have 2x2 or 4
> square inches of surface area
> 5. To get 4 square inches of surface area with a wire of unit length you
> need a wire with a diameter of D=4/3.14 or 1.27 inches ....
> Now what guage wire would that be??
>
>
>
>
> --
> Brian Stewart
> Pilgrim
> Whitby 42 #304
> VB8320 VA3PIL
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