ALL STAINLESS HARDWARE End Fed Dipole 80-6M Portable HF Matchbox.

Description

THIS IS THE UPGRADED ALL STAINLESS ANTENNA HARDWARE MODEL
OVER 4000 SOLD WITH PERFECT SUCCESS
UJM-150
End Fed Antenna Matcher
Made by a HAM for Hams
PLEASE READ FULL LISTING AND PLEASE LOOK AT EVERY PICTURE!!
I HAVE ANTENNA HARDWARE LISTED IN MY OTHER ITEMS FOR SALE TOO. EBAY ITEM NUMBER
202997373525
My standard zinc coated listing will last for many years in any weather but this listing is the upgraded ALL STAINLESS ANTENNA HARDWARE MODEL so there will never be an issue with components starting to rust.
Tiny and light weight but ready and capable to put in work! This unit is
encased
in a 1″x 2″x 3″ ABS box! And comes with a VERY HIGH QUALITY SO-239 connector. This is available in a BNC connector version if you would like. To see or buy the BNC version just scroll to the top of this page and look for the “see other items” button found straight to the right of the “add to cart” button.
Does your HOA try to deny you the ability to have antennas up?
Are
you looking for a quick and convenient way to run a portable dipole
without needing 2 or 3 supports or several antennas for portable or
permanent operation?
The UJM-150 may be just for you.
WHY MY MATCHBOX IS DIFFERENT
I
have a unique toroid that I custom order for my units. After many many
hours and many dollars spent in R&D I finally found the best working
comination of toroid and wire size and type. Simply put, my unit is NOT
a “google how to” and throw together unit. I take pride in my work and
products and make them the best I can.
This unit will allow you to run an end fed dipole (1 single wire) on almost any band with just a single wire and radio+tuner.
My matchbox is made with a larger toroid than most here and solid copper wire allowing more power to
run
through it.  You can run from QRP to 150Watts PEP easily if using a
tuner with random length.
This is accomplished with a trifilar wound
unun (not balun) transformer at a 9:1 ratio. How this works is really
quite simple. Running a standard dipole with 2 elements has about a 72
ohm feed point at the center but end feeding a dipole will result in
impedance levels from 1800 to 5000 ohms! That’s way too much for a tuner
to handle right?
Well that’s what this matchbox takes care of.
Simply put it brings the impedance down to levels that tuners can deal
with and a tuner isn’t even needed if you trim to a good length.
Most users will find no rf issues and find no rf choke is needed. That said, using a GOOD rf choke is always good ham practice
and I do have my own designed
choke/s with full choking specifications listed with the one authorized
distributor for them. It can be found by putting the eBay item number in
the eBay search bar. That number is 264946030545
HOW TO DEPLOY
First
off you will need a tuner unless you use the chart provided a little
lower in the description and trim to resonant length! The bands you can
tune up and work depends on your tuner. I use a LDG with my 897d and I
can tune up 160-6meters. Although probably not very efficient on 160 it
will tune up for me.
Use at least 16 feet of coax from the box to the tuner! The box uses the shield of your coax so the 16 feet or more is good.
You
can run your antenna as a vertical/sloper/inverted L/or zig zag even.
Myself, I usually use a 60′ wire and wrap it around and up my 32′
telescopic mast while portable. Or I use a 30′ wire and run up 20′ or so
and make an inverted L. The fun thing about being a ham is
experimenting and finding out what works the best for you in your
situation.
COMMON AND PROVEN LENGTHS OF WIRE TO RUN ARE AS FOLLOWS;
(FEET) 35.5  41  58  71  84  107  119  148  203  347  407  423
ALSO,
AFTER YOU PURCHASE AND BEFORE I SHIP I WILL SEND YOU A MESSAGE WITH A
WEB LINK TO SELECTING A LENGTH FOR YOUR INTENDED PURPOSE.
I
have many customers that swear this thing rocks on 20 meters perfectly
without a tuner using a 84 foot wire and they can tune up on ALL other
bands.
Some bands may benefit from using radials or a small
ground rod depending on the antenna wire length.  You can add or
subtract from your antenna wire to obtain a better match for any band/s
you wish.
So just run your antenna wire 22-84 feet, run to your tuner and to your radio, tune up and talk!
WHY ARE MINE SO CHEAP IF THE QUALITY IS STILL TOP NOTCH?
Very
simple! You are buying the matchbox. You can use whatever wire or cable
you want for your element. There is no sense in sending this with a
40’piece of 14-18 gauge wire when you may want to use 84 feet or 22′
right. I myself use a small stainless braided cable from a fishing down
rigger for my element and I’m very very happy with it.
You can Youtube Nelson Antennas or Nelson End Fed and find customer reviews.
WARNING!!!
I
am eBays top seller of portable antennas and there something you need
to understand if you don’t already.  Other sellers state….. “Mine is
not just a matchbox that you must use a tuner with but mine is truly
resonant.” Think about that for a second folks, mine is the same way
with the added correct length of antenna wire! Fact is that some people
don’t have room for 65 feet of wire and some people want more than 30
feet of wire so I leave the length you would like to run up to you! You
can run a random wire like 30 feet and use with your tuner and radio and
tune most if not all bands depending on your tuner. Or you can run 200
feet and do the same. Or you can test a few lengths and find a length
that will work well on all of the bands you want to work and choose your
own length and guess what….You can find a length of your own that is
resonant on all of those bands without a tuner just like the other guys
act like they invented.
Fact is folks, I make a great product at a
good price and always stand behind what I sell. I will always take care
of my customers as my feed back surely shows.
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