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Folded Dipole for 6 meters

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Ian, MM6ISM

Tue Sep 22 2009, 04:34PM
Hi there,

Does anyone know if there any designs for folded dipoles for 6 meters? I'm looking to build a vertically polarised one that isn't too large, I don't want to upset the neighbours too much.

Regards,

Ian.
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Mark, CT1FJC
Tue Sep 22 2009, 09:54PM
Mark, CT1FJC
Registered Member #287
Joined: Sat Apr 19 2008, 12:14PM

Posts: 15
Hi Ian
First why a folded dipole /. Second why vertical ?
Think you would be better with horizontal antenna, but if it got to be vertical, try a "J" pole.
Take a look at the DK7ZB web site.
While you are there take a look at 2 el hoz 4.6 db over a dipole !
Worry about the neighbours if they complain and change to a Vert "J" pole inside a plastic drain pipe, or dipole. "Well its a breather vent pipe".
Good luck, 73 Mark CT1FJC
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Ian, MM0IMC.
Tue Sep 22 2009, 10:34PM
Ian, MM6ISM
Registered Member #1054
Joined: Sat Sep 19 2009, 06:56PM

Posts: 7
Hi Mark,

I thought a folded dipole would be physically stronger than an "open" dipole and vertical because it's for local FM use. I'll have a look at the J-pole design, but I don't want something that looks like a demented Heath-Robinson design HI.

Regards,

Ian.
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Brendan, G4DYO
Fri Sep 25 2009, 09:49AM
Brendan, G4DYO
Registered Member #441
Joined: Sat May 24 2008, 06:56PM

Posts: 42
Hi Ian. If you are only interested in local FM traffic why not get one of the tri-band verticals covering 6,2 and 70? They're unobtrusive and would fix nicely to a chimney, or maybe at the top of a 20ft scaffold pole?

73 Bren G4DYO
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Ian, MM0IMC.
Sun Sep 27 2009, 10:12PM
Ian, MM6ISM
Registered Member #1054
Joined: Sat Sep 19 2009, 06:56PM

Posts: 7
I've already got a dual band vertical up for 2/70 as I didn't want anything too big and neighbour unfriendly. I has hoping for something reasonably low profile, but I don't think this is going to be the case...

Regards,

Ian.
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Dave, M1BTI
Wed Sep 30 2009, 09:54AM
Dave, M1BTI
Registered Member #295
Joined: Sun Apr 20 2008, 05:37PM

Posts: 24
Hi Ian. Why dont you consider Brendans suggestion and take the dual band down and replace with the triband if your stuck!! The triband is only 6' long and doesn't look that bad in the air.
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Ian, MM0IMC.
Sat Oct 03 2009, 07:45PM
Ian, MM6ISM
Registered Member #1054
Joined: Sat Sep 19 2009, 06:56PM

Posts: 7
Dave, M1BTI wrote ...

Hi Ian. Why dont you consider Brendans suggestion and take the dual band down and replace with the triband if your stuck!! The triband is only 6' long and doesn't look that bad in the air.


Hi Dave,

I'm giving it due consideration, but will the XYL allow it? HI. But seriously, it is something that I am thinking about. I'm using a Diamond dual band co-linear at the moment, are there any tri-bander co-linears with an N connector worth considering? I've got Westflex 103 coax up at the moment and don't want to change the connector unless I have too.

Regards,

Ian.

[ Edited Sat Oct 03 2009, 07:49PM ]
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Dave, M1BTI
Sat Oct 03 2009, 08:24PM
Dave, M1BTI
Registered Member #295
Joined: Sun Apr 20 2008, 05:37PM

Posts: 24
Hi Ian. Don't tell the XYL, she wont know any different if you do it on a day when she's shopping, simple. I've never come across any tribander with a 'N' fitting that I can recall. At your given frequencies I doubt that you will notice any difference in power loss or receive. A PL259 to 'N' connector to the antenna will make no odds, unless you're a purist. Have you ever thought of putting a HB9CV up? not a lot of difference in size to an old band tv antenna, that'll give you about 4db of gain. 100Watts transmitted into the antenna with 4dBi gain will give you 250+ Watts EIRP from the antenna, assuming no losses. Should of also said a tribander is closer to 7', but don't mention that to the XYL either, LOL

[ Edited Sat Oct 03 2009, 08:26PM ]
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Ian, MM0IMC.
Sun Oct 04 2009, 07:42AM
Ian, MM6ISM
Registered Member #1054
Joined: Sat Sep 19 2009, 06:56PM

Posts: 7
Hi Dave,

I quite fancy the Comet GP15N or the Diamond V2000. The other thing I've noticed about some triband co-linears is that they seem more suited for the US 6 meter band allocation of 50MHz-54MHz (more specifically the 52MHz-54MHz part), how does that affect us here in the UK wanting to tune the antenna to the 50MHz-52MHz portion?

Regards,

Ian.

[ Edited Sun Oct 04 2009, 07:59AM ]
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Stewart, GM0GTU
Sun Oct 04 2009, 08:32AM
Stewart, GM0GTU
Registered Member #228
Joined: Thu Apr 10 2008, 11:49AM

Posts: 2
Ian,
I built a Double Bazooka from some RG59 coax inside 1/2" PVC conduit, with an inspection Tee-piece as the centre. It works better than any of the commercial tri-band verticals on 6M and it's cheap as chips; easy to build.
Don't pay silly money for antennas when you can easily build your own.
I also use one for 4 Metres.
Google Double Bazooka and/or Coaxial dipole for instructions and dimensions.

73, Stewart
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