Steve, thanks much, I think I will look into this antenna further.
Seventythree
----- Original Message -----
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, October 25, 2008 9:34 AM
Subject: Re: Windom
> 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
>>
|