Hi Tom,

I don't have either one, but here is what I understand from  a  little 
internet browsing:

Both the CC and DD start out as the same basic antenna, 82 feet long  and 
consists of a    full size 40 meter dipole and loading coils on each end 
with some additional wire to load on 80 meters.   That's it as far as the DD 
goes, but the CC adds 2 parallel  dipoles held by spreaders  below the main 
dipole for 20 and 10  meters.   I don't think there is an additional wire 
for 15 meters, but I may be wrong.  What is often done in multi band 
antennas is to let the 40 meter section also tune on 15 meters.

If you aren't familiar with the idea of a parallel wire dipole, all the 
wires for the  various bands  join at the  center feed point   and are fed 
by the same feedline.    The wires are then held apart by non conductive 
spreaders to minimize interaction between the various bands.   This is the 
sort of antenna I have here: full size 80 meter dipole with loading coils 
and extra wire to load on 160 at a total of 164 feet, and a full size 40 
meter dipole  hanging below and connected to the same feed point.

Hope this makes sense.
73, Steve KW3A
----- Original Message ----- 
From: "T Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, July 11, 2009 10:40 PM
Subject: Re: dxcc and dxdd


>    Richard and all:
>
> Forgive my ignorance, but what's the difference between the DXcc and the
> DXdd?
>
> The DXCC has been highly recommended to me for my new qth with a small lot
> out in Colorado, and I was planning to make the purchase this week.
>
> 73 from Tom Behler:  KB8TYJ
>
> ----- Original Message ----- 
> From: "Richard Fiorello" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, July 11, 2009 9:34 PM
> Subject: dxcc and dxdd
>
>
> Hi;
> Just looking at the alpha delta info and since the dxdd and dxcc seem to =
> be about the same price why would you go with the dxdd?  Is there some =
> advantage on 80 meters?
> Also I have to measure but if this is possible it would basically be a =
> flat top with nothing holding the center.  Any suggestions as to light =
> coax?
> Also one end attaches to a tree.  I have heard all the stories about =
> throwing rocks, using a bow etc but what method has worked for people?  =
> I could invite my friendly tree trimmer over but once he scampers up the =
> tree how best to attach some rope?
> The other end would have to attach to a chimney mount also used for 2 =
> meters.  I wonder if the weight and pull of the antenna might give me a =
> chimney problem?  I don't want falling bricks in January.
> This is very much in the thinking stage so any input appreciated.
> Richard
>