[CQ] antenna building?

[Michael Shiloh]

you pull the cat's tail and it meows elsewhere,

but there is no cat.

Josh Myer wrote:
> I'm stuck inside a little apartment in the mission, so I can't really 
> mount one.  We might be able to put one at noisebridge, though, if we 
> had a station there.  We could also terminate it SMA and, if anyone 
> asks, we mention that it's like having an ethernet drop available.  
> Except the net is actually the ether...
> 
> Mark's replied with an antenna analyzer; does anyone else have one of 
> these, or preferred schematics for building one?
> 
> On Thu, Nov 12, 2009 at 11:50 AM, Michael Shiloh 
> <michaelshiloh1010 at gmail.com <mailto:michaelshiloh1010 at gmail.com>> wrote:
> 
>     Both yours and Mark's suggestion are excellent. I'm up for either.
> 
>     The question is, is anyone else interested in building either of these?
>     We could buy the parts together and probably build them in an afternoon.
> 
>     I'm interested in 2m and 70cm, both well suited to the two suggestions.
> 
>     Jonathan Lassoff wrote:
>      > Excerpts from Michael Shiloh's message of Thu Nov 12 10:39:30
>     -0800 2009:
>      >> i need to make a very simple antenna for my dual band handheld
>     (FT-60R),
>      >> so that i can use it inside my faraday cage (shipping container)
>     at the
>      >> shipyard.
>      >>
>      >> i envision a simple vertical perhaps with 4 radials. it will be
>     mounted
>      >> on the roof of my container and so has a nice metal groundplane.
>      >>
>      >> to simplify construction i don't  want to raise it very high. i hope
>      >> that a 2 * 4 stuck in one corner of the container will suffice.
>     i will
>      >> somehow have to clear the (unused) solar panels on my roof.
>      >>
>      >> my constraints are:
>      >>
>      >> 1. price must be near zero
>      >> 2. scrounged materials might be quite exotic but are entirely
>     unpredictable
>      >> 3. reasonably easy to construct
>      >
>      > For which band were you thinking? I've had good luck in the past
>     making
>      > verticals with a chassis-mount SO-239 connectors.
>      >
>      > The most common kind has a square plate to rest against the
>     chassis and
>      > four holes in the corner. I would solder four copper wires as a
>     ground
>      > plane and angle them down to match the right impedence.
>      >
>      > In the center pin, I soldered another copper wire straight upwards.
>      >
>      > The lengths of the wires can be adjusted for different frequencies.
>      >
>      > Pretty cheap ('cept for the cost of the connector), and functional.
>      >
>      > --j
>      >
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> 
> 
> 
> -- 
> Josh Myer 650.248.3796
> josh at joshisanerd.com <mailto:josh at joshisanerd.com>
> 
> 
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