[TowerTalk] Multi-band dipoles

[W4ZW]

Put a big 50 ohm resistive load at the center of most any wire antenna and
it will be "broadband."  Or take a good dummy load and string wires in two
directions and you will surely have some radiation.

YMMV,


73's from 10,000'


Jon Hamlet, W4ZW/Ø
Breckenridge, Colorado 



-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Fred Serota
Sent: Thursday, April 21, 2011 11:45 AM
To: Fred Serota; towertalk at contesting.com
Subject: Re: [TowerTalk] Multi-band dipoles

Correction, the Barker and William's antenna is 180' long, comes in
copperweld or stainless, for amateur or commercial use (not sure the
difference here other than price) and is designated the BWD-180 (with or
without the "S" for stainless wire)

See www.bwantenna.com
or www.bwantennas.com
or google Barker and Williams

Fred, K3BHX

--------------------------------------------------
From: "Fred Serota" <fserota at msn.com>
Sent: Thursday, April 21, 2011 1:30 PM
To: <jim at audiosystemsgroup.com>; <towertalk at contesting.com>
Subject: Re: [TowerTalk] Multi-band dipoles

> Suggest trying Barker and Willamson's folded dipole. They have three 
> or 4 varieties, some made of stainless wire for very tough climates. 
> The longest is approximately 120' and fives a flat SWR under 2:1 for 
> 160-6 meters. Due to built in matching does not need a tuner. This 
> antenna has a special name, I have forgotten. Can be ordered direct or 
> I, thing, through HRO and AES.
>
> Mine is hung as an inverted V and works out very well.
>
> Fred, K3BHX
>
> --------------------------------------------------
> From: "Jim Brown" <jim at audiosystemsgroup.com>
> Sent: Thursday, April 21, 2011 1:24 PM
> To: <towertalk at contesting.com>
> Subject: Re: [TowerTalk] Multi-band dipoles
>
>> On 4/21/2011 9:22 AM, Tom Osborne wrote:
>>> Are 15 and 17 too close together to have 2 antennas on the same 
>>> feedline.
>>>
>>
>> I think so. I had the same problem with 40, 30, and 20 in a fan -- 
>> the
>> 30 was too close in length.  From my experience, an 80/40 fan loads 
>> and works very will on 15M and 17M, with the expected lobing from any 
>> antenna that is much longer than a half wave. Before I had my 
>> SteppIR, I ran 30M, 17M, and 12M on my 80/40 fans and was very happy 
>> with them. I still use them on 30M, and have 100 countries confirmed on
that band.
>>
>> 73, Jim
>>
>>
>> _______________________________________________
>>
>>
>>
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