[time-nuts] antennas was Re: Common-View GPS Network

[Chris Albertson]

Another way to ask this question is "what is the effect of a small
deviation form the ideal dimensions?"

If we assume deviations of about 1/20th of a wavelength are OK then we can
allow about 1cm of dimensional error.  Almost anyone using simple hand
tools can do better.

With care using primitive "garage" equipment we can do much better.  The
old-school hand method for precision sheet metal work was to make a
hardwood form and then bend and cut the metal around the wood form.

I think if a cake pan would work is a matter of luck.  You'd just have to
find one within about 2cm of the correct diameter.  If not then you be
better off starting with flat sheet and hand shears.


On Tue, Apr 16, 2013 at 10:46 PM, David J Taylor <
david-taylor at blueyonder.co.uk> wrote:

> From: Sarah White
> I just have to ask though... cake pans? really? I can't imagine it would
> even be possible to modify a cake pan with enough accuracy to get a
> usable antenna.
>

-- 

Chris Albertson
Redondo Beach, California