Leaderboard

With many commercial and business operators going to 700 to 900 MHZ last year, there are many radio shops that have "trade in" antennas in warehouses just collecting dust. An excellent way to fabricate a permanent or movable base station antenna is to buy a used NMO mount and attach that mount to the center of a piece of 20 or 22 gauge galvanized steel cut in a circle 12 inches in diameter as a ground plane plate. Get a used gain type, center loaded mobile antenna and secure it to the NMO mount. Use a couple 6 inch per side "L" brackets (for putting up shelves on a wall) attached to the underside of the ground plane plate so that the legs of the "L" brackets are as far apart as the diameter of a mast pipe. Secure the "L" brackets to the mast with two spiral radiator hose clamps and bingo - a base station antenna with around 3.7 to 5.4 db gain (depending upon your antenna element choice) that can be placed just about anywhere. Varied NMO mounts: http://www.theantennafarm.com/catalog/mobile-antenna-mounts-264/ The ATV situation may pose problems because most bodies are fiberglass or carbon fiber. But we can use the same type of NMO mount and steel and use a compact 6 inch 1/4 wave mobile antenna tucked out of the way wherever it would be convenient to mount. Whip imaging: http://www.theantennafarm.com/catalog/laird-tech-qwft120-763.html I personally have no experience building directional, vertically polarized yagi's, so I'll defer to others for suggestions there. This is an example of one: http://www.theantennafarm.com/catalog/tram-browning-br-6355-3581.html If you do contact a radio shop for used components, just check with them to see if they might have a trade in UHF base station antenna resonant to around 460 to 464 MHZ. I recently picked up a used Tram antenna for $18.00 - it is like the one in this link: http://www.theantennafarm.com/catalog/tram-1486-1575.html Good luck with the projects.

P-G, Yes it is,I have watched a youtube video where someone actually did this,here is the video of a completed repeater.http://www.youtube.com/watch?v=pFVkczJKzVA also here is the link where you get the instructions to build it. http://www.repeater-builder.com/kenwood/pdfs/tk-805-wiring.pdf