Coax shield picking up interference the coax shield when not terminated at each end acts as an independent antenna.
Attic hf antenna.
The easiest attic hf antenna giving you coverage of all or most amateur bands is a loop of wire round the perimeter fed with a remote sgc autocoupler in the center which will match the wide range of loads presented by the loop on all bands to the 50 ohm coax used for the feeder.
A determined operator with an attic of nice size on a 2 story house really has a wonderful platform for which to launch a great set of antennas.
It can potentially capture and contaminate the valid rf energy coming in from your attic shortwave antenna with undesirable electromagnetic and electrostatic interference.
Simulation is a great tool for the attic antenna farmer because it will help you to understand what will not work.
Since ge is the number one antenna seller in the u s it s no surprise that they make one of the most versatile models on the market.
For example an attic antenna will work better with a plywood asphalt shingled roof compared to a metal roof.
That was a down and dirty antenna to quickly let me get on hf.
Made for enhanced high definition reception the ge pro outdoor attic mount antenna optimizes your free digital channels in full 1080p hd.
Antennas generally perform best when they re out in the clear but there is no law that says you can t use an outdoor antenna indoors.
The second problem to solve.
Attic antennas many types of antenna can be mounted in the attic if you don t have radiant barrier tech shield.
Need lots of room keep them away from metal objects like heaters and ducts wire antennas can be run near the peak of the roof inside the attic bent in odd shapes to match the space available.
With his antenna matching unit providing an acceptable match he s on the air making contacts.
Attic antennas can work better than you might think some of mine work as well as their outside counterparts no i m not comparing to a 150ft tower big yagis.
When i moved into a ranch style one story house i started with an attic antenna.
If you have some sort of attic in your home apartment or condo you re in luck.
Another local uses an hf loop antenna tacked up around the circumference of the ceiling of a second floor bedroom.
For example you can install a wire dipole in almost any attic space.
The rf losses are fairly low in wood and most roofing at hf vhf most of problem comes from interaction with electrical wiring and ductwork.
A lot of hams are struggling in an hoa with antennas o.
Dipole and long wire antennas can also be used with mobile outdoor style auto tuners feeding them in an attic space.
