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\'s Top Portable/Permanent Antenna Builder/SellerPLEASE READFirst, a bit about Nelson Antennas.I have been here on since 2005. While I have built and sold literally tens of thousands of antennas, I have chosen to keep my operation a 1 man show. I only trust myself to manufacture, build, tune and test antennas of my quality. I build every antenna as if it were for my own use.I am not one of the many that have copied another antenna and started pedaling them while not fully understanding them. Most that copy other antennas, miss things in the fine details that really set the antenna apart. Many circles pedal common materials lists as though there is a simple copy and paste method that ends in the same product every time. I can sure you, this is not the case and there are many fine details that are almost all overlooked or totally misunderstood that wil result in losses of efficiency and effectiveness.Every antenna I build, is done by my own design, which includes limitless hours and finances in R&D, to find the highest efficiency and effectiveness I can get.I don\'t skip on anything. There are no compromises when it comes to what works best for the wanted ouutcome.You know I have been here for many years just by looking at my dated pictures in the listings, which I hope to modernize at some point soon.
I also send a sheet with every antenna with online groups for buyers to join where you can interact with my customers and myself for anything from showing off your setup and DX contacts, to asking me or any of my customers for help with any questions.
NO TUNER NEEDEDTHIS IS THE UJM-80-10EFHW
This antenna is made by using a matching network consisting of a
49:1 bifilar wound toroid with the needed capacitance added for wide, multi band, no tuner needed operation.
PLEASE LOOK AT ALL PICTURES TO SEE THE DETAILS AND CRAFTSMANSHIP!I also offer a full length 40-10 meter version of this antenna. Click on my items to see that antenna.This sale is for a true, half wave end fed antenna for 80-10 metersThis antenna is rated at 200W PEP and 60W digital/CW@50/50 duty and is PERFECTfor both portable or permanent installations!This antenna comes complete with 130 feet of stealthy but strong MARINE fully tinned 18AWG insulated stranded copper wire, dogbone insulator and all Stainless Steel hardware on the matching box. Marine wire is tough and made for harsh environments. The box is sealed with a foam gasket as well.Without a tuner the antenna works 80,40,20,15, 10 and usually 12 meters as well. 12 meters will depend on your setup.With a decent tuner you can also tune 30 and 12 meters and 17 meters. Touch up 75m with any tuner.
I do also have a 40 thru 10 meter version listed for sale and is only 65 feet long. One of the great things about this antenna is that the height you mount it will have a smaller affect on SWR than other antenna types. This gives you a large flexibility in your installation. One huge advantage of these antennas is that they typically have very good \"ears\" with a low noise floor!
As you can see from the picture the antenna box does come with the mounting eye-bolt wired for optional ground however with this type of antenna adding a ground or counterpoise will have little to no affect on the antenna tuning and is not needed since it\'s built as a DC ground potential antenna already. Also, NO RF CHOKE NEEDED AT ALL IN ALMOST ALL INSTALLATIONS!
Antenna uses a standard SO-239 connector to accept your coax with PL-259 connectors. Another advantage of this antenna is the endless ways you can deploy it. I recommend a simple sloper installation and you can mount the box close to the ground with your element sloping upwards. When installed as a sloper you will see fantastic results if you can get the far end of the element up to 25\' or more. That being said, you can install this antenna: horizontal, vertical, inverted \"L\", zigzag and more.
The screenshot pictures shown above on the Rigol Spectrum Analyzer and SWR at the radio are shown with the antenna in a sloper configuration with the box fed at 5 feet and the far end up at 27\' from the ground fed with 75\' of LMR400 coax. Your unique installation may vary those reading a bit. This is a very simple antenna to install and no extra instructions are necessary but if you do have any questions please feel free to ask. Simply secure a cord to the mounting eye-bolt and stretch out your element for your installation and secure it.
Great for ALE HF-link stations, NVIS, MARS, ARES, EMCOMM I have produced and sold more than 15,000 antennas here on alone and still maintain a 100% positive response for a reason. everything I make and send is made by myself, no help allowed and only made as if it were as my own antenna. I feed my family this way and so my customers ALWAYS get the highest level of quality and customer service I can provide. To put it simple, my livelihood depends on it. If anyone has an issue at all, please just send me a message through the groups that come with the antenna and I will take care of you as I have done on here for over 15 years now. I also have 9:1 unun Random Wire Matchboxes that are designed to be used with a tuner on all bands with a *random* length wire as well. PLEASE LOOK AT MY OTHER LISTINGS! 73 KD8UJM
