Saturday, October 19, 2013

My LNR End Feed ANT review

In this post, we will look at this trail friendly antenna. It was purchased from universal radio website.

BTW: You save approx $20.00 iirc by using universal radio vrs  directly


This EFA post a standard BNC interface for your feedline




Body construction is plastic and the size of a box of matches



The end insulator is a small plastic solid rod and lite-weight



And a single stainless steel lug supports the antennae single radial



Now the 1st thing that I need to mention, when they say trail friendly; " they mean just that ". This  single wire with matchbox design weighs about the same as a large celluar phone. It's made from a very light weight wire & components and fits into my go-case ( Pelican ) with my rig and key. You could carry this in  the front pocket of a shirt and not even notice it. The whole assembly wrapped up is about the size of a phone or mpeg player. And next to my galaxy mini, the complete system is small, compact and lite.




I had problems right out the box with 3 things;

1: The thing you wound the wire back up was a little big challenging for me. So I just loop it around the plastic rig and velcro tied it. Trying to wrap it back up in the so-called X format was not happening for me. It's quite time consuming to roll the radial backup as-is. So trying to re-create the "X" was a challenge for me & why bother with it.




NOTE:  You can see my velcro orange tie that I'm using in the background for securing the wrapped  EFA


2:  The matchbox body is plastic and maintains a mount hole for suspending. It's place in one of the worst position and right next to the BNC barrel.  This interference, make it extremely challenging with  insert any type of string or cord.





imho: They should have offset this as represented in this diagram;



3: I could never get this antenna SWR down. Yeap I had a hard time tuning on 20m or even 40m. I sure it was me, but SWR was way over 4:1  Reactance was all over the place,  R all over the place and nowhere near 50ohms.  Needless to say, I was frustrated the 3 times I strung this thing up and tried to tune it over the course or 2 days. I will continue to investigate at my current QTH.



What I did notice tho, positioning of this antenna seem to play a big part in the tuning. I found this position was less impacting  and the father the insulator was from the support structure the better




I will most likely get a setup and erected antenna in  this fashion




I have a small palm like bush that I will use to secure the antenna & approx  6ft up in the air. This is the highest that I can achieve. Not ideal,  but it's all that I have to work with at this time.


NOTE: This antenna is not made no-where as strong as the radiowavz. It could easily be snap or broken and should not be permanent fixture.

And lastly, you don't want to apply a lot weight in your support rig. Fishing  Line would be most ideal for supporting this insulator. Remember the material constructions of this unit is less than a 2 packs of cigarettes if I had to guess.

The qrp-rig+key+ant can fix in a pelican 1170 case





73s from kf3lix 


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