Attic Hf Antenna Risk

Discussion in general technical questions and answers started by w9mbt feb 29 2012.

Attic hf antenna risk. You ll hardly be able to find a more powerful or practical model within the same price range. To sum it all up with its long range tree new bee tnb wa2608 is a great amplified attic antenna that comes at a really affordable price. Play it safe and disconnect all outdoor antennas during a thunderstorm and use your vhf uhf indoor backup as needed. Sadly you are probably more likely to have rfi issues on the lower hf bands because rfi proofing measures tend to be less effective there.

Made on 80m and the hf bands and as i m using the same atu for both antennas i ve concluded that the loft antenna suffers as a result of coupling a fair proportion of radiated energy into mains wiring pipe work and other structural components. Incidentally the 6 5m vertical is also worse than the modelled values would suggest. The antenna is in the attic probably only about 16 18 above the ground. For the most common type of antenna the dipole the high voltage point is the ends of the antenna.

Dipole and long wire antennas can also be used with mobile outdoor style auto tuners feeding them in an attic space. Bare copper antenna wire stapled directly on wood rafters causes loss of rf signal energy. On top of it all the product comes supplied with a really long 40 ft coaxial cable making it possible to use. But on 40 meters a distance of 3 feet is ok.

Lol i would really like an antenna that works well on 40m and 20m 10 and 6m would be a bonus. All of the wire antennas used insulated hookup wire. The figures below shows the configuration of these antennas. I have a icom 7300 and a g5rv jr.

These views are looking at the wall of the attic area facing the living space. Horizontal wire antennas may also present a lightning hazard but to a lesser degree depending on height and exposure. With time bare copper oxidizes the wood where the wire is tightly stapled to absorbs some of this oxidization and forms a loose yet lossy bond with the wire. Antennas in the attic are a fire hazard this is one of my most favorite excuses because the factual case of a fire hazard is nearly impossible to make.

Running a vertical antenna in the yard is most likely not an option. With his antenna matching unit providing an acceptable match he s on the air making contacts. Another local uses an hf loop antenna tacked up around the circumference of the ceiling of a second floor bedroom. My final antenna suite while in the townhouse consisted of 2 sets of hf dipoles and a j pole for 2 meter operation.