Here are the dimensions and diameters from Bob85 & Multimode200 for the New Vector 4000. The hoop has a dimeter of about 30". Good luck.
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Modified Vector 4000
- Thread starter bob85
- Start date
Here are the dimensions and diameters from Bob85 & Multimode200 for the New Vector 4000. The hoop has a dimeter of about 30". Good luck.
4000
thanks marconi for the reply. Now if I can get some free time I will see what I can put together. I know some have used a modified gamma from maco so I guess I will do the same. It will be alot easier that way I supose.
thanks marconi for the reply. Now if I can get some free time I will see what I can put together. I know some have used a modified gamma from maco so I guess I will do the same. It will be alot easier that way I supose.
I am thinking about building my 4000 clone out of copper pipe instead of aluminum. Has anyone built one this way?
B
BOOTY MONSTER
Guest
i wouldn't use copper pipe for a free standing vertical more than 10 feet long . its very heavy and i expect the soldered joints to fail in modest wind ....... if they even survive raising the antenna . also , RF wise , there is absolutely no humanly detectable tx or rx difference between copper or aluminum .
I don't know about needing the welder, but aluminum tubing is a much better idea for antenna construction due to its superior strength to weight ratio.
B
BOOTY MONSTER
Guest
i bought some tubing from DXengineering last year and they shipped very fast and the tubing was nicely packaged/protected for shipping .
Aluminum Tubing Type 6063 - 6 ft.
Aluminum Tubing Type 6063 - 6 ft.
just curious if got to test yet?and what is the ideal height to get these
up to. cause be hard to put up a 40ft. tower with a 20 plus foot antenna on the top
of it..lol
C0pper is too soft, heavy and expensive. You'll love yourself for choosing aluminum.
Toll_Free
Well-Known Member
Copper has a lower resistance than aluminum, so the lengths will have to be adjusted EVER so slightly. Probably not that you would even notice.
As others have said, copper is SOFTER, so it will bend and flex.
What nobody else pointed out is this: Due to skin effect, the conductivity of the OXIDES matter. Aluminum oxide conducts RF better than copper oxides (the green shit that comes on copper exposed to elements).... SO, over time, aluminum antennas WILL outperform the more expensive, heavy and unwieldy copper ones.
Copper = bling, though
)))
--Toll_Free
As others have said, copper is SOFTER, so it will bend and flex.
What nobody else pointed out is this: Due to skin effect, the conductivity of the OXIDES matter. Aluminum oxide conducts RF better than copper oxides (the green shit that comes on copper exposed to elements).... SO, over time, aluminum antennas WILL outperform the more expensive, heavy and unwieldy copper ones.
Copper = bling, though
)))--Toll_Free
Copper has a lower resistance than aluminum, so the lengths will have to be adjusted EVER so slightly. Probably not that you would even notice.
As others have said, copper is SOFTER, so it will bend and flex.
What nobody else pointed out is this: Due to skin effect, the conductivity of the OXIDES matter. Aluminum oxide conducts RF better than copper oxides (the green shit that comes on copper exposed to elements).... SO, over time, aluminum antennas WILL outperform the more expensive, heavy and unwieldy copper ones.
Copper = bling, though
--Toll_Free
Maybe that's what the claim of an antenna getting burned in comes from due to the oxidation and expelling of oils placed on the metal.
Copper=crack heads stealing it.
Eddie are these the Modified Version numbers that is supposed to work better? or just stock numbers?
No antenna when modeled with Eznec needs a matching device to show the results of gain etc. A matching network as far as I am aware doesnt effect radiation patterns of antennas, if you think it does then maybe Jay's hairpin does more than what you think it does, if you say his hairpin does nothing but provide a match then we are in agreement that a matching network is not needed for an accurate model, knowing how the program works is more important for modeling accuracy.
They are the numbers they measured Multimode's New Vector 4000 from. The model I sent you is the Antenna Specalists version of their Sigma4 with three legs.