> Thanks Bill,
> Got some good ideas from the photos.
> Any sign of the ground system?
All three of the antennas had the same sort of ground system. About a
#10 ground wire circles the transmitter building. Approximately 30 radials
are connected to that wire. While I would assume that they go out in an
even spoke fashion, all three antennas had that the radial wires soldered to
the bus wire unevenly. Five radial wires might be soldered to the bus rather
close together. Then there would be a relatively large space before another
group was soldered. Based on the way that the gounds were maintained,
the radials are longer when they are run close to underneath the horizontal
portion of the T antenna. Either that or the radials are short in all
directions,
or the radial wires were plowed over when crops were planted closer to
the transmitter building at right angles to the T wire direction (or they were
buried very deeply).
Again, based of the way that the grounds are maintained, I would assume
that AUH's top-hat vertical has radials run out to the wire end support posts
(which are about 25 feet further away from the vertical than where the
electrical end of the top-hat is [and where the top-hat end wire circle is]).
The AUH radial ground bus ring was again around the transmitter building
(not around the vertical base).
Some people prefer to be told exactly how to connect A to B to C to D
so that they can "make an antenna from the book." I prefer to "steal"
the S idea from one design, the U from an old book, the I from a friend,
add a C from an obscure design, and then use my own M idea, put them
together and make my own antenna MUSIC...
If the AUH antenna makes me change my plans for a future antenna
slightly (and it may be opposite from how that antenna was made), then
I've come out ahead in looking at it.
73, Bill K0HA
|