[Lowfer] TAG on the air for testing

[Jay Rusgrove]

John

Thanks for the info. You've still got a good signal here although I am starting
to see more "jitter" on the signal than I did earlier. Will keep you posted on
what I see.

Jay Rusgrove, W1VD

John Andrews wrote:

> Jay,
>
> > Okay.  I'll bite... (pun intended)... What is your TX antenna?
>
> It's a loop antenna that would appear to meet the Part 15 requirements
> without any interpretation. I'm doing it as an experiment.
>
> The antenna is diamond-shaped, with a perimeter of 15 meters (four 12 foot
> sides). The bottom of the antenna is about 8 feet off the ground, and the
> the top is hung from a rope looped over the crotch of a tree. The other two
> corners are tied off to nearby trees. The plane of the loop is roughly on a
> 60/240 degree (true) line, putting you right in the maximum.
>
> The antenna itself is four #8 copper wires in a cage, held apart about 2.5
> inches on center with PVC spreaders. The four wires are connected together
> at the end of the loop, but otherwise separated. The RF impedance measured
> about 0.2 +j18 this afternoon. I'd love to get the resistance lower, but I
> think the ground and the nearby trees are a big component of that. At this
> point, the antenna current is about 2 amps, giving about 800 milliwatts into
> the antenna terminals.
>
> The idea behind all of this is to see if a strictly legal antenna can be run
> successfully from a wooded area with no ground system at all. My early
> conclusion is that it can, assuming you don't set your expectations too
> high. I've got some more playing to do, hopefully next weekend, but I
> suspect the signal-level improvements will not be great.
>
> John Andrews, W1TAG
>
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