"Priz" wrote in message
ups.com...
I'm pressed for space outdoors so right now, I'm working with attic
antennas and need some help.

I was able to put a 60 foot loop of wire into my attic and am not
having much luck getting it to load up. I configured the loop as an
open loop, aka a dipole bent into a rectangle which is open at one
corner and fed with 300 ohm twinlead at the other. I'm using an MFJ
911H 4:1 and 1:1 balun to tranform the twinlead to coax and a homebrew
antenna tuner.

Using an SWR analyzer, I find the only place I can get low SWR is near
the 15 meter band and some frequency ranges above it, like 6meters and
2 meters. I was hoping the 60 foot length would help me get down to
the lower bands with some compromise, but at least I was hoping to get
there. The transmatch, which consists of 2 capacitors and 2 inductors
isn't any help at all. I've used it in the past to load up random
wires and such, but this project doesn't seem to be working.

Anyone have any experience with this sort of antenna? Let me know
what it is I'm doing wrong.

Any advice is appreciated.

I use a closed loop of approximately the same size. It is corner fed with
coax (don't know the length...probably about 20-25 feet). A MFJ tuner is at
the rig, and will match it all the way down to 80 meters. However,
performance is very bad below 14 Mhz.

So my suggestion would be to first try closing the loop, since this is a
pretty easy experiment with a pair of alligator clips and a piece of wire.
Next, you might change the feedline length to give the tuner a try at
different feedpoint parameters.

I do have a lot of induced RF in the attic wiring. You might use RF chokes
on solid state heat/ac thermostat wiring to prevent damage. Good luck.