On 3/23/2011 11:18 AM, bpnjensen wrote:
On Mar 23, 4:39 am, wrote:
I did some surfing on the Internet and found a great deal of information
about Ground Antennas. Run a wire from a grounding rod to your antenna
lead on your radio and sure enough you start pulling in signals from the
ground. I conducted a simple test and it seems that some stations on the
lower bands offer very acceptable reception. I also read that this
matter was studied up until the 1930's and then all research ended. I
don't recall this ever discussed in this group before. Comments?

Roger

I wonder what would happen if you then also stuck a wire up a tree
amnd connected it to your radio's ground?


At radio frequencies, there's really no such thing as a grounded
wire. Get a few feet away from the ground point, and it isn't ground
anymore.

So a wire grounded at one end and running up to a tree limb on the
other, and tapped anywhere along its length to feed a receiver or
transmitter, is just a shunt-fed vertical or slant-wire antenna. You
can vary the feedpoint resistance, but little else, by moving the
tap up or down. WFAX (1220 kHz) in Falls Church, Virginia, gets out
very well using a shunt-fed grounded vertical. The popular folded
unipole MW antenna is a variation on that theme.


With all good wishes,


Kevin, WB4AIO.
--
http://nationalvanguard.org/
http://kevinalfredstrom.com/