[ARC5] Antenna for small yard

[Kenneth G. Gordon]

Neil:

I do antenna modeling here.

First of all, if you can give me a really clear address, I may be able to look your yard up on 
Google Map.

I have no clear idea of your orientation N to S, E to W, and no clear idea of your physical 
plant layout there either.

So, in the meantime, let me see if I have this correct.

Your apartment building is parallel to a fence which is 24 feet long. One corner (the "right" 
corner, direction?) of the apt buildfing is 19 feet from the fence and the end of the apt 
building is even with that end of the fence.

At the "left" end of the fence, it makes a right-angle back towards the building and within 6' 
runs into a concrete earthquake reinforcement which reinforces that end of the apt building.

How "deep" does this concrete reinforcement extend towards the "right" end of the apt 
building? Is the apt building set back from some end of the concrete slab so that there 
remains 13 feet between that point and the building?

How high is the apt building? Can you reach the roof easily? How "wide" is the building? Do 
you live in all of it, or are there other tenants in the same building?

Is there similar room on the "other" side of the apt building?

What is the height of the fence at its top above ground?

Do you wish to operate on both 80 and 40? Higher? Lower?

> So, for an approximately balanced antenna, I would have the 24 feet, plus 6 feet at each 
> end right-angled back towards the apartment. Obviously I can make no use of the concrete slab 
> portion, even though more fence is available at the other end.

What does this mean (more fence available at the other end) in "physical layout" ? Other 
end of what?

Where is your operating position with regard to either end of the fence?

> I'm unwilling to mount on stand-offs (I have somewhat of a vandalism problem here) and don't 
> want anything obvious.

For over a year, I used an antenna made out of #36 black enameled wire, 66 feet long, and 
fed it with a BC-610 at 250 watts output. Even if you knew it was there, you couldn't see it 
from 6 feet away.

This was at a College in Montana which forbid antennas on or near the dorms I was living in 
at the time.

I/we used short sections of clear polystyrene rods as end insulators.

Ken W7EKB



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