Im going to try to put up my A99 in the next few days and going to put a bauln under it. I'm going to use rg213 coax. How many turns do i need to make? Thanks
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how many turns?
- Thread starter bluestallion
- Start date
I use 5 - 6 turns on a 4.25" former. You don't have to use a former, but it helps me keep the turns side-by-side. For a former I use a 4" PVC drain line coupler.
4 inches is way too small for RG-213. You want to make the coil RADIUS at least 10x the cable's OD. For 213, with an OD of 0.405", that would be a 4 inch RADIUS.
Radius being half the diameter, we're looking at an 8 inch DIAMETER to be on the safe side, especially if you're using significant power or the coax will ever be exposed to hot sunlight day after day.
Radius being half the diameter, we're looking at an 8 inch DIAMETER to be on the safe side, especially if you're using significant power or the coax will ever be exposed to hot sunlight day after day.
I wont be running lots of power through the coax, only my palomar 225. I live in southern IN, but this summer it was warmer out.
B
BOOTY MONSTER
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what should i use to hold my rf choke? Have a pvc t come off the tower to a piece of pvc pipe and just zip tie the choke to that? or actually wrap the coax around it? cuz i havnt seen a piece of 8 inch pvc pipe. Anyone have any pics of their set choke? thanks
Drill a couple of holes close enough to the end of the coil and use wire ties.
Done.
Make SURE that this choke doesn't touch the masting. Keep it mounted 3-4 inches away.