Hi Kevin,

Well, 200 KHz isn't too bad on 80.  I used to get about 100 KHz on 80 with
my trap dipole.  I know people say ladder line is the best way to feed an
antenna, but personally, I prefer coax because you don't have to worry
about things around it affecting the SWR.

Steve

On Saturday 2/15/03 13:26 Kevin Nathan wrote:
>I'm sorry, I should have covered that.  It is fed with RG-8.  On 40 it
>covers the entire band with SWR under 2 to 1.  On 80 it is about 200 KHz
>wide between 2 to 1 SWR points and on 160 about 75 KHz.
>
>I hope that helps.  Very 73.
>
>Kevin, K7RX :)
>
>-----Original Message-----
>From: Blind-Hams For blind ham radio operators
>[mailto:[log in to unmask]]On Behalf Of Steve Dresser
>Sent: Saturday, February 15, 2003 18:23
>To: [log in to unmask]
>Subject: Re: Antenna Recommendation
>
>
>Hi Kevin,
>
>I have two questions.  First, do you feed the antenna with coax or ladder
>line?  Second, do the traps cause the antenna to resonate in a very narrow
>portion of the band?
>
>Steve
>
>On Saturday 2/15/03 13:02 Kevin Nathan wrote:
> >Hi All,
> >
> >I just want to give a short review of my new antenna.  It is the Alpha
>Delta
> >DX-A also known as the twin sloper.  This antenna consists of two wire
> >elements attached to a center mounting plate.  One of these is
>approximately
> >67 feet long which works on 80 meters and the other is 55 feet long with a
> >coil/trap arrangement in it called an iso-res inductor.  This element works
> >on 40 and 160 meters.  The antenna attaches to one leg of a tower or can
> >also be mounted to a nonconductive support.  It uses the tower as the
>ground
> >return so if you use a nonconductive mount, it recommends the use of a down
> >lead to a ground rod at the base of the support.  The antenna looks just
> >like an inverted vee when you set it up.
> >
> >Here it is mounted on a 50 foot Rohn 25G tower at about the 42 foot level.
> >I have a Cushcraft A3 on the top of the tower along with a 3 element 6
>meter
> >beam and a vhf/uhf collinear.  The directions and literature for the
>antenna
> >say it works best with such top loading.  Alpha Delta may be able to give
> >ideas for top loading when a beam isn't present.
> >
> >Now, for performance.  Despite all the bad mouthing this antenna has taken
> >over the years from antenna gurus, it is working like a bomb for me.  So
>far
> >with only one real week of work I have worked V31FG on 160 the other
>evening
> >as well as a couple of long path QSO's to Europe which I mentioned on here
> >before.  Last night I got on in the contest on 40 meters and worked P40,
> >KP4, PJ2, FM5 and others all with 100 watts from the Seattle area.  Then, I
> >went down on 80 and worked TG0, P40 and one other Caribbean station I can't
> >remember without looking in the log.  Admittedly, I did run about 600
>watts.
> >Then, this morning on 80 I worked several JA's, RU0 and BV.
> >
> >While it's not a power house antenna, it is certainly a better dx antenna
> >than I've ever used on those bands.  It also works very well on 30 and 17
> >with the tuner in my rig.  It does well with local contacts as well.
> >
> >All in all, for $60 U.S. this is a winner and a keeper.  I just wanted to
> >give people out there an idea for another antenna if they are looking and I
> >appreciate you reading this.
> >
> >Thanks much and very 73.
> >Kevin, K7RX :)