I built a j pole out of 1 2 copper and i have it zip tied to a vertical 2x4.
J pole antenna in attic.
By michael martens apr 1 2012 amateur radio emcomm slidedeck.
Often amateur radio operators are looking for alternative locations to install their antennas.
Primarily it allow you to be totally stealth which is important if you live in a neighborhood that restricts outdoor antennas.
Also make sure your pl 259 s are installed correctly with good physical and electrical connections.
Also with a jpole you ll want a choke.
You shouldn t have to worry about water in the attic.
If the top of the antenna touches the walls or roof the performance may be affected slightly.
I have a similar situation going on in the attic above my garage.
You will need a peak in your attic that is tall enough for the antenna to fit.
The kb9vbr 2 meter j pole antenna is 69 inches tall overall.
There is some of that metallic barrier sitting inches away from the bottom 10 or so of my j pole and i m able to full quiet my repeater about the same distance away with 5w.
You can use a coil of 6 to 10 turns of coax or some snap on ferrites.
Attic antennas have a couple of benefits compared to mounting an antenna outdoors.
If you live in a space restricted location or are under a hoa restriction you may be able to mount an antenna outside.
If you attic isn t tall enough you could angle the antenna mounting to make it fit.
Mounting ham radio antennas in the attic.