So whichever way I go, do I put a screw in each side of the dipole and run the hot side of the coax to one side and the ground of the coax to the otherside?
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Imax 2000 GPK
- Thread starter SMILEX2692002
- Start date
Yup.
You could get some of the EMT 1/2" tubing and use a 1/2" ID T-fitting in Schedule 80 type and use it to make it supported by a push-up pole. Or even supported by another piece of 1/2" 10ft EMT. Mount that on a roof and you are off to the races. Once the dipole is properly tuned first - of course . . . Making it self-supporting . . . Even 'rotatable' if you do it right . . . Dipoles for the CB band become directional when placed @ 25 ft - or more - above the ground . . .
The Schedule 80 stuff can be used in sunlight, as it is protected from UV ray degradation.
Couple of bucks for that too . . .
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I used two old mismatched firestiks and a piece of flat stainless stock to make one this afternoon. I drilled two 3/8" holes for the antennas and two 1/4" holes for some woodscrews. The 7' was standing up with the coax attached and the 5' was looking down and just bolted to the stainless. I screwed this to the underside of the eave on my house and hooked it up to an old 949. SWR across 11m is below 1.5:1, could use some tuning but I'm just experimenting. After this nation wide squall line blew through, skip was gone but some of the locals were coming in good. My roof blocked most of the signal, but it did work.
Just want to make sure i understand this correctly.
When pointing the ends of this horizontal dipole in the North/South direction
My transmitted signal would go in a East/West pattern?
Then if I turn it 180 degrees so the ends are facing the East/West direction
My transmitted signal would be in a North/South pattern?
I also wondered what height would be best for a rotate-able horizontal dipole for DX contacts.
I was thinking somewhere from 18 to 36 feet for 11 meter DX?
When pointing the ends of this horizontal dipole in the North/South direction
My transmitted signal would go in a East/West pattern?
Then if I turn it 180 degrees so the ends are facing the East/West direction
My transmitted signal would be in a North/South pattern?
I also wondered what height would be best for a rotate-able horizontal dipole for DX contacts.
I was thinking somewhere from 18 to 36 feet for 11 meter DX?
Any dipole antenna can have a 'broadly' directional radiation pattern. 'How' directional it get's depends on it's height above ground. That radiation pattern starts of not directional at all, omnidirectional, begins to get sort of oblong'ish, and then more directional in broadside directions at greater height. So what's the height where it get's 'directional'? Typically around a full wave length and higher it's as directional as it's going to get. It's never going to be as directional as a beam of any kind and will be bi-directional in broadside directional.
Think of it as two flood lights back to back, sort of. Ain't never going to be two spot lights.
There's a roughly minimum height for that 'best' directionality, something like a full wave length above ground, there's no maximum height for that directionality.
That help any?
- 'Doc
Think of it as two flood lights back to back, sort of. Ain't never going to be two spot lights.
There's a roughly minimum height for that 'best' directionality, something like a full wave length above ground, there's no maximum height for that directionality.
That help any?
- 'Doc
RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
I found 10 and 12 foot telescoping crappie poles at gander Mountain...cheap too.
B
BOOTY MONSTER
Guest
and a beam is just a dipole with a reflector and director(s) which do increase it's directionality and back door rejection .
That's a lot of mounts. Lowes carries fine thread nuts and bolts that'll fit antennas. You could also pick up some flat stock, angle iron, and some small nuts/bolts there and fab that same thing for probably the same price.
I'm contemplating trying one out in a tree top made with a couple of old whips that are laying around.
Finished building the dipole today.
Sucks that the winter weather will not allow me to permanently install it outside.
I was thinking about mounting it up on my 40 ft tower when spring comes.
I have a Ham 3 rotor to use.
Overkill for this light antenna but its all I have to use.
Right now I have an Imax 2000 on the tower.
Anybody know if I could mount the Imax 2000 above the horizontal dipole on my tower?
Sucks that the winter weather will not allow me to permanently install it outside.
I was thinking about mounting it up on my 40 ft tower when spring comes.
I have a Ham 3 rotor to use.
Overkill for this light antenna but its all I have to use.
Right now I have an Imax 2000 on the tower.
Anybody know if I could mount the Imax 2000 above the horizontal dipole on my tower?