[TowerTalk] Fwd: Two Wires Antennas, One feed line

[hanslg at aol.com]

 There is an interesting effect feeding two identical dipole antennas. You will see an increase in bandwidth. I once tested making a (resonant), 5 ' long helix for 10 meter. I happened to make it a little short but the indications I got was that it should be possible to make a 5' long mobile wipe that could cover the entire 10 meter band without tuning. I do remember seing an article there you had two 80 meter dipoles in parallel to achieve a wider bandwidth. Encurraging!

Hans - N2JFS

 


 

 

-----Original Message-----
From: Dave Tipton, W5DMT <dave at w5dmt.com>
To: 'Roger (K8RI)' <K8RI-on-TowerTalk at tm.net>; towertalk at contesting.com
Sent: Tue, Jun 15, 2010 3:06 pm
Subject: Re: [TowerTalk] Two Wires Antennas, One feed line


Actually, on this same vein, I've always wondered what would happen if you

were to feed two identical dipoles with the same feedline.  Say North+West

Legs on the braid, and South+East legs on the center pin.  Would it resonate

*and* be quad directional, or would it just become some bizarre mess in the

sky?  I had a similar type antenna to this cut for 40M (4 1/4 wave legs) fed

with 300 Ohm twin lead when I was a novice.  (I didn't know not to do it.)



-----Original Message-----

From: towertalk-bounces at contesting.com

[mailto:towertalk-bounces at contesting.com] On Behalf Of Roger (K8RI)

Sent: Tuesday, June 15, 2010 1:33 PM

To: towertalk at contesting.com

Subject: Re: [TowerTalk] Two Wires Antennas, One feed line







On 6/15/2010 12:34 PM, n8de at thepoint.net wrote:

> This has been covered in depth over the past few months re: 40m/80m.

>    

Are you sure.  I tend to take things literally and he asked about "two 

separate antennas". Even though multi band the fan dipole to me is one 

antenna.

He may have meant something like the fan dipole, but that was not the 

way it was worded.



Two individual antennas can be fed with one feed line, but it may get a 

bit complicated if bother are not at the same feed point.



73



Roger (K8RI)

> Same answer for the bands you propose.

>

> It will work.

>

> Don

> N8DE

>

> Quoting Steve Bagley<n2mai at arrl.net>:

>

>    

>> Hey Boys and Girls,

>>

>> This question may be simple, but for some reason it has me baffled.  Is

it

>> possible to use one feedline for two seperate wire dipoles?  I have the

room

>> for an 80 and 160 meter dipole.  Thoughts?

>>

>> Steve, N2MAI

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