(Larry W4CSC) wrote in message ...
On 11 Mar 2004 15:11:15 -0800, (Terry) wrote:

There has been, and will always be hot debates over the best and or
safest
way to ground an radio and antenna system.
While I do not have enough room for a beverage, the "isolation"
technque
from this web page helped knock the local QRM down to make listening
much more enjoyable. I have my isolation transformer mounted outside
my
"radio" room. I did not use the resistive matching pads.

If you'd like to experiment with REALLY low-noise antenna systems,
might I suggest you build a simple receiving loop for the desired band
or bands you wish to listen to. A good receiving loop antenna will
blow the doors off a longwire. Here are a few articles and some
experience to help you get started. Even someone in an apartment can
have super receiving antennas!

http://www.qsl.net/kc2tx/
http://pages.zdnet.com/radio_k7zb/id14.html
http://members.aol.com/articles4lf/bploop.pdf
http://members.fortunecity.com/xe1bef/loop.htm
http://www.hard-core-dx.com/nordicdx/antenna/loop/
(If you use hula hoops, buy your own, not use your kids')
http://www.angelfire.com/md/k3ky/page45.html

Just like the loop antenna in your AM table radios, you can NULL OUT
that damned insulator down the street or your neighbor's livingroom
lamp dimmers with a loop....(c;



Larry W4CSC
POWER is our friend!

The only problem with all of the loops that I am familiar with is the
need to tune the loop for the frequency of interest. Since I listen
from below 200KHz to 20MHz, it is difficult to do this with commonly
available parts. The advantage of a "long" wire antenna is the wide
frequency range with no tunning.
I have a VLF loop for listening to "whistlers" and other ELF events.
And a McKay Dymek loop for MW. Perhaps someday I will be able to
affoard to build a remote loop, that covers the 3 decades from 100KHZ
trrhough 20MHz.
I have dreamed of a remote loop, with servos to allow it to be rotated
and tilted from the radio position. It is clearly "do-able", but not
by me.
Terry