Hi Jim,
I guess the old line is that if it ain't broke, don't fix it. I pretty
much do a choke all the time, but if you have no RFI problems, I
probably wouldn't bother.
It's usually done on a 6 inch diameter core, and anywhere from 6 to 10
turns, depending on who's bible you are reading.
Good luck with the ground rod. I just pounded a rod in yesterday at the
new coax entry point. Hope you ate your Wheaties.
73, Steve KW3A
On 7/18/2013 5:48 PM, Jim Gammon wrote:
> Hi Steve, what is the diameter of the 10 turn coax choke? In my
> case, I am not using any power over the 100 watts, am using a
> DXCC center fed antenna with no ballon, do you think there is any
> need for a coax choke with this kind of set up. My recollection
> is that there is not, but I am always open to thoughts on this
> subject. I just found out that my ground may not be sufficient
> so am off to get an eight foot ground rod to pound in by my
> shack. Jim WA6EKS
>
> ----- Original Message -----
> From: Steve Forst <[log in to unmask]
> To: [log in to unmask]
> Date sent: Thu, 18 Jul 2013 17:44:22 -0400
> Subject: Re: Windom 6 thru 80 meter antenna
>
> Fred,
>
> One final thing I'll throw out as a head's up, is that since the
> off
> center fed antenna is unbalanced, there is a bit more of a
> chance of
> RFI then with a center fed dipole. More likely if you run
> power.
> I had some RFI when running a THP solid state amp on 1 or 2
> bands,
> which caused the amp to fault. A ten turn coax choke at the
> feedpoint
> fixed it.
>
> I won't say it is a common problem, but it is something you
> should be
> aware of.
>
>
> You might want to look at reviews on e-ham to help with your
> research.
>
> 73,
> Steve KW3A
>
> On 7/18/2013 4:51 PM, Fred Adams wrote:
> I just got my wife to help me do a little measuring and I
> believe I can
> just fit the 80 meter windom antenna in. I plan to put a small
> station in
> my bedroom and I have a small 38 foot roan tower outside my
> bedroom so I
> think I have the support in the perfect place. It looks more
> interesting
> all of the time. I am close to the city airport so I can't put
> up anything
> very high. My base station is about 42 feet at the apex and
> does fine for
> what I do. On my base station I have a 80 double bazooka and a
> DXCC
> antenna. Thanks to all of you guys for the info. I will let
> you know how
> things work out. I think I will give the windom a good try.
> Thanks again,
>
> -----Original Message-----
> From: For blind ham radio operators
> [mailto:[log in to unmask]]
> On Behalf Of Steve Forst
> Sent: Thursday, July 18, 2013 3:52 PM
> To: [log in to unmask]
> Subject: Re: Windom 6 thru 80 meter antenna
>
> Ok Fred. If you plan on using a support to hold up the
> balun/feedline, figure about 90 feet for the long end of the
> antenna and
> 45 feet for the short end. If you are lucky, you will have an
> existing support at the right spot. I didn't use any support
> for the
> feedpoint, but many people do.
>
> 73, Steve KW3A
>
> On 7/18/2013 3:43 PM, Fred Adams wrote:
> Steve, thanks much. I plan to do some outside measuring and a
> little
> further checking on the antenna but I like the sound of the info
> that
> you provided. Thanks again,
>
> -----Original Message-----
> From: For blind ham radio operators
> [mailto:[log in to unmask]]
> On Behalf Of Steve Forst
> Sent: Thursday, July 18, 2013 3:29 PM
> To: [log in to unmask]
> Subject: Re: Windom 6 thru 80 meter antenna
>
> Fred,
>
> It is basically the same length as a full size 80 meter dipole,
> just
> that the feedpoint is off center. Depending on what brand you
> go with,
> it will be somewhere around 133 - 136 feet long and feedpoint
> will
> be around 2/3 from one end. Baluns will also vary: some use 4:1
> and
> others use 6:1.
>
> I had one up a few years ago and it worked quite well. It works
> harmonically on bands above the lowest band (80 meters), so no
> tuner
> needed on 40, 20, 10, and even on 12 and 17 meters. It's not
> resonant
> on 30 and 15 meters although you can use a tuner and make it
> work.
> There is also a mod to add a parallel dipole to make it resonant
> on 30
> and 15.
>
> Mine was set up in a slanting configuration, with one end
> hanging
> down from the highest point. I think it can work in a few
> different
> configurations, but maybe the flat top or inverted vee are the
> most
> common.
>
> Good luck, Steve KW3A
>
> On 7/18/2013 3:11 PM, Fred Adams wrote:
> Are any of you guys running the 6 thru 80 meter windom antenna?
> If
> so, I would appreciate some info on this antenna. How long are
> the
> legs and best height for average use? Any good or bad things
> that
> you have to say about the antenna. I recently heard a guy
> talking on
> a windom and he had a very good signal barefooted and this got
> me
> interested. First, I have to know the length so I can find if I
> have
> the
> space. I will appreciate any info
> good or bad. Thanks much,
>
>
>
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