In the attic i determined the direction of true north using my phone s compass app aligned the plate accordingly and then attached it to the attic floor with decking screws.
Mount a yag in attic.
Locate best place to mount it by moving the antenna around and radio if necessary.
The second person will be up on the roof or wherever you plan to mount the outside antenna and will be aiming the outside antenna.
A new control cable was also run between the rotator and the control box in the shack.
Designed to mount inside your attic the solar star ventilation fan im 1500 converts passive gable dormer powered and whirlybird vents into an active solar powered venting system.
The kb9vbr 2 meter j pole antenna is 69 inches tall overall.
Building an effective hf antenna can be difficult when space is limited building a beam antenna may appear impossible if you don t have enough room to house the directors and reflectors required by these beam antennas.
If it works mount the antenna in the attic where the signal is best.
Build a 10 or 20 metre yagi antenna in your attic.
And see if you pick up any of it.
Point the yagi in the direction of the p25 signal.
Works with existing attic venting.
Ideally you want the antenna mounted to a pole that you can hold rather than holding the antenna directly since holding the antenna can affect the performance.
However it may be possible to use your loft space to house an inverted v yagi beam antenna.
Rotator attached to plywood mounting plate ready for attic installation.
If your house has a tin or steel roof then the attic wouldn t be much of an option.