Frequency and power level of the rf field b.
Ham attic antenna safety.
Distance gain and duty cycle are the three factors to consider when installing and safely operating an antenna system be it outdoors or in your attic.
What uni you go to.
Distance from the antenna to a person c.
All of these choices are correct.
Safety and rf exposure are important topics to consider.
On vhf a beam antenna can work well in the attic even a rotator can be used.
Again stay away from metal and wires to maintain your pattern.
Radio frequency exposure is usually not a significant hazard for most amateur radio stations.
Falling through the roof is a much more likely scenario.
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.
Just don t touch it.
The house will act as a natural shield and as long as your attic mounted antenna system is independent to the rest of your antennas lightning won t be an issue.
If you are mounting the antenna in your attic you d need about 7 10 feet of space between the antenna and the occupants in the house.
On hf wire beams can be run on the roof supports or the rafters these usually are good for one direction only but can be switched electrically for different coverage.
What factors affect the rf exposure of people near an amateur station antenna.
But even if you can t put up an outdoor antenna you can still operate with antennas installed in an accessible attic space.
Many hams including many of you reading this are limited by hoa or other outdoor antenna restrictions.
This is great for the amateur radio operator that is providing net control activities during a skywarn severe weather activation.
Bare copper antenna wire stapled directly on wood rafters causes loss of rf signal energy.
Lots of amateurs in these situations are doing so successfully especially on hf.
It s perfectly safe up in that range of power.
The attic shortwave antenna wire this is the most importantaspect to improve.
Yes in the attic.
If you really want to do an indoor antenna be aware that it s going to be a bitch to tune suscepable to all kinds of indoor rf noise and not very efficient though running jt and psk might make it worth while.
Radiation pattern of the antenna d.
