Fred,
Most, if not all of the commercially sold ones use direct coax feed with a
balun at the feedpoint. Most use 4:1 baluns, while some use 6:1. It's the
off center feedpoint ( roughly 1/3 from 1 end) that makes it work
harmonically on other bands. A full size 80 meter one will also work on
40, 20, and 10 meters, as well as 17, 12, and 6 meters.
Very high swr on 30 and 15 meters, but that's life.
73, Steve KW3A
----- Original Message -----
From: "Fred Adams" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, October 25, 2008 9:15 AM
Subject: Re: Windom
>I have never used a windom antenna. What kind of feedline do you use? Can
> coax cable be used? It sounds like an interesting antenna. Right now I
> use
> regular dipole antennas for 80 and 40 meters and I use a Gap vertical for
> the other bands. I do not have space for 160 meters.
> ----- Original Message -----
> From: "T Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, October 25, 2008 7:35 AM
> Subject: Re: Windom
>
>
>> Steve:
>>
>> Well, your SWR's overall are considerably better than mine, but what
>> really
>> caught my attention is your good SWR's on 10 meters.
>>
>> Mine are not that good, although I can't think of what they are right
>> now,
>> because it was not my band of focus when I did my original testing,
>> although
>> I know I ttook some readings there.
>>
>> Will check those out if I get the chance this week-end.
>>
>> Question: I know we've been through this before, but I'm curious: How
>> long
>> is your Windom? I think you have the 160-meter version, correct?
>>
>> It's back to math again! (grin)
>>
>> 73 from Tom Behler: KB8TYJ
>>
>> ----- Original Message -----
>> From: "steve" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, October 24, 2008 9:58 PM
>> Subject: Re: Windom
>>
>>
>>> Tom,
>>>
>>> For what it's worth, here is a peek at the swr of my Windom:
>>>
>>> 75/80 meters: 1.8:1 bottom of band, 2.4:1 top of band, nothing lower
>>> than
>>> 1.8:1 anywhere in the band.
>>>
>>> 40 meters: 2.4:1 bottom of band, 1.5:1 top of band, 1.0:1 at 7,.200
>>> khz.
>>>
>>> 20 meters: 2.2:1 bottom of band, 1.0:1 top of band, most of ssb portion
>>> is
>>> less than 1.3:1
>>>
>>> 17 meters: 1.0:1 at mid band.
>>>
>>> 12 meters: 1.5:1 across entire band.
>>>
>>> 10 meters: 2.4 bottom of band, 2.2:1 top of band, best swr 1.6:1 at
>>> 28.600
>>> khz
>>>
>>> 6 meters: 1.3:1 across bottom 200 khz of band
>>>
>>> You've mentioned 15 meters again. Mine is 5:1 across the entire band,
>>> which
>>> is how it should be. Antenna isn't going to work harmonicly on that
>>> band. If you get low swr on 15 meters, something else is out of whack,
>>> and
>>> if you use 15 meter performance as a benchmark for the antenna, you are
>>> barking up the wrong tree.
>>>
>>> Used mine to work all 600 plus QSO's in the PAQSO, but will be pulling
>>> it
>>> down in a few weeks to get the 160 meter antenna back up.
>>>
>>> 73, Steve KW3A
>
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