By David - K3DAV (2/28/2012)
The Dominator 6M is designed and sold exclusively by Norwalk Electronics located in Norwalk Connecticut. SIRIO ANTENNA is contracted by Norwalk Electronics to build the Dominator 6M, because of their quality to details and workmanship. The Dominator 6M is designed as a strong dependable 6 meter repeater antenna, but covers the full 6 meter band very well for home use. This is a 5/8 wave performer. The base diameter is 1 3/4 inches, and made of 1/8 inch thick high grade 6061 magnesium alloy aluminum tubing. This may be the best 6 meter vertical antenna you will find. Norwalk Electronics gives their "guarantee that no other 6 meter omni directional antenna in production can outperform this 5/8 wave."
The base load coil is open air as shown in photo at right. It is made of heavy duty 12 gauge enameled copper wire. The alloy tubing is drawn and cemented onto the coil form during assembly. The aluminum tubing is also riveted through the coil form for maximum strength and the RF connections are insured by hex set screws machined into the aluminum hubs. The coax connector has a lower and upper weather seal to prevent water from getting into the coax line.
There are 8 Ground radials made from the same quality material as the main radiating element. The use of 8 elements provides an almost 360 degree solid ground plane to better keep the RF radiated pattern concentrated towards the horizon where it belongs. They also improve on reducing ground noise. They are tubular with brass inserts in the end that connects them to the antenna. The brass inserts add strength to the elements to hold them firmly in their slots. The other end of the elements have soft PVC caps cemented on to keep moisture out.
The base mounting bracket (shown at right) holds the antenna in a unique way. The base just below the load coil is riveted to the mounting bracket. The bracket slides down over the mast. Two sets of locking bolts at the upper and lower areas of the bracket, are tightened against the mast to secure the antenna firmly on the mast.
There are 4 sections to the main radiator. The very top section has 9 clear markings in 500KHz increments starting at 50MHz and up to 54MHz, that show how far to slide that section into the next lower section to set the resonant frequency. It is preset by the factory at 52MHz. Heavy duty hose type clamps lock each section firmly in place.
All of the reviews from customers say the Dominator 6M is built like a tank and outperforms any 6 meter antenna they have ever tried. It is perfect for repeater use, as well as for base station use across the 6 meter band.
As of October 2015, this antenna sells for $199.00 plus $25.00 for S/H within the USA. You can buy it directly from the Norwalk Electronics website by CLICKING HERE.
Here are the specifications from the Norwalk Electronics website....
Update as of March 11, 2012
I just received mine through the mail, and upon opening the box and inspecting the antenna, I can say without question that this antenna is built strong and very well designed. It is a very impressive antenna indeed. Other manufacturers could learn a few things from how this baby is constructed. As for it's performance, I can only go by the reviews from eham.net and 1 friend of mine, which all say this antenna is the best. But later on when I get my new Dominator 6M up and running, I will post another update with my own review and detailed results here.
Update as of April 7, 2012
I finally got my Dominator mounted on the roof. It is on a 10 foot pole and is about 25 feet from the antenna base to the ground. LMR-400 coax is used of course. I can say that this antenna works very well. I have the antenna tuned at 51.500MHz. This sets it to the center of the transmit section of 6 meters. Frequencies from 53 through 53.999 are mostly for repeater outputs, so transmitting in the 53MHz range is rare to never. So I set it to be in the center of 50 to 53MHz where you usually transmit.
The SWR at 51.500 is flat (1.1:1). At 50 and 53MHz, the SWR is about 1.2:1, and a 1.3:1 right at 54MHz. You can't ask for a better SWR across 4 megahertz than that. Signals of the 6 meter repeaters I can hit average about 1.5 to 2 "S" units higer than they were on my old Comet GP-15 Tri-Bander. The GP-15 had an SWR of almost 2.0:1 at 50 and 54MHz, with a 1.4 in the center of the band. I can hit the same repeaters as before, but now I can use a bit less power.
I put this antenna on my MFJ-269 Antenna Analyzer. Keep in mind my Dominator is set to be resonent at 51.500MHz. At extreme frequencies of 49.500 and 54.500MHz, the SWR is still only a 1.5:1. That is 5 whole MHz with no more than a 1.5:1. Are you ready? At the extreme frequencies of 49.200 and 55.200MHz, the SWR is just peaking a 2.0:1. That is 6 full MHz with a maximum of a 2.0:1 SWR. That is what I call broadbanded. Norwalk Electronics designed a super antenna for 6 meters. This baby is up to stay.
The Dominator has a bonus that is not advertised. It receives very well on 15, 12, 11, and 10 meters. The SWR on transmit is near a 5.0 SWR on 11, 12, and 10 meters, and about a 6.0 on 15 meters. But the radio's built-in auto tuner takes it down to flat in seconds and my transmit signal is not much lower on the Dominator than it is with my I-MAX 2000. So if you have a good tuner, the Dominator works surprisingly well on 15, 12, 11, and 10 meters in a pinch.
If you have any questions or comments about this antenna or the article, please feel free to contact me at email@example.com