With antennas, size is everything. Bigger is always better!
The fact is, the more metal you have in the air, the better your antenna is going to work for you. Both transmit AND receive. A normal half wave dipole on 40 is 66' long. Imagine one that is 114' or even 230' but is still resonant across the entire band? An 80 meter half wave dipole is 132; long. How about one that is 230' long instead, but still resonant and usually under 2:1 across the entire band? Or a 20 meter dipole that's normally 33' long having 140 feet of antenna! That's what is so special about our antennas. More antenna, yet still resonant so there's no tuner needed.
Through some intensive modeling and testing we've found that perfect set of designs to give you two bands on each antenna and both are at least double or triple the length of a dipole for the same bands.
Bigger is better!
If you are looking for:
For those of you who want to know how and why it works on a technical level please visit AD7MD's web site and get the full scoop. He's always happy to answer questions too.
Check out reviews on eHam!
The CCD antenna is like nothing else on the market. And it just might be that bit of magic you've been looking for.
CCD means Controlled Current Distribution. This is a full wave dipole (or can be a long wire style) that has a series of capacitors mounted along the wire on specially designed boards. The capacitors allow us to have a impedance that is able to be matched to ladder line or baluns while having an antenna about twice as long as a standard half wave dipole. See the About CCDs for more info on this.
This antenna is well worth looking into. We have a full set of articles that have appeared over the years that shows the advantages of the CCD. The disadvantage has always been that they are a total pain to build. Now, for the first time, you can have one that is commercial quality and built to last!
Q: What is it?
A: It's a full wave dipole that has anywhere from 22 to 28 capacitors evenly spaced along the wire.
Q: What does 'controlled current distribution' mean?
A: The name is misleading because it's not really about current. It's about bringing a full wave antenna to an impedance that can be matched with our various feel line limitations of 50-600 ohms.
else does the antenna do other
than put more wire in the air for me?
Q: What bands are available?
Q: Can I use it on other bands?
Q: Can I feed several CCDs with
the same coax? (assuming no remote antenna switch
- those work okay)
Check out the various magazine article collection on CCDs (you'll see it's not just us who think these are
pretty darned dynamic antennas!)
See how we build them! (yeah, messy shop, but great antennas come out of it!)
Below is a peek at the capacitors as they are on the antenna. These are VERY strong antennas!
Below shows a completed 40 meter antenna ready to install!!