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Reviews Categories | Antennas: HF: Vertical, Wire, Loop | LNR Precision EF-QUAD Help

Reviews Summary for LNR Precision EF-QUAD
LNR Precision EF-QUAD Reviews: 13 Average rating: 4.9/5 MSRP: $$125
Description: End Fed resonant antenna for 40,20,15,10m 65ft long.
Product is in production.
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KI8M Rating: 5/5 Sep 3, 2017 16:03 Send this review to a friend
It is my go to antenna for portable operations  Time owned: more than 12 months
I purchased EF-Quad over a year ago and it is part of my portable "kit" when I go out of town or to one of the many parks in S.E. Michigan. I had little problem getting the antenna resonant on the phone portion of 10 thru 40 meters.

I can't say anything negative about the antenna. It is everything I want for portable operation. Glad I bought it.
KK9H Rating: 5/5 Jul 17, 2017 08:03 Send this review to a friend
Used for portable station  Time owned: more than 12 months
During the summer we go on vacation to the north woods in northeast Wisconsin. I like to take my K3 with me and over the years I have experimented with a number of antennas. When I read about this antenna it sounded just perfect for my situation and it is. There are many tall trees around so I can easily get both ends up over 40 feet. Being an end-fed antenna, feed line location is very convenient. Out of the box, the lowest SWR point is approximately 1/3 up from the bottom of each band and well under 2:1 at the upper ends so I did not feel any need to adjust it. Performsnce is exactly as expected for a half wave antenna. It works equally well talking to friends back home in Chicago on 40, working DX on 20, 15 and enjoying some band openings on 10. It is a great antenna for portable operation including Field Day.
N6STA Rating: 5/5 Jun 1, 2015 10:22 Send this review to a friend
fantastic  Time owned: 0 to 3 months
Had it for two days now. Trimmed a foot off the end and left all the 'pigtails' alone. SWR using YouKits FG-01: 80 - 6.3; 40 - 1.2; 30 - 7.1; 20 - 1.4; 17 - 3.2; 15 - 1.4; 12 - 3.2; 10 - 1.7

This is with a low installation (peak at 16 feet) and a right angle about 16 feet from the far end.

I am happy.
KB7MGA Rating: 5/5 Apr 8, 2015 19:07 Send this review to a friend
Excellent Antenna  Time owned: 6 to 12 months
It had been a long time since I was able to work 10 thru 40 meters on one antenna. The EF-Quad enabled me to easily work these bands and also helped renew my interest in the hobby as another review stated.

I live in a restrictive HOA. I draped the antenna over a tree in an inverted U fashion. The antenna easily hides in the tree even in the winter time and works great radiating in all directions with this configuration. If there is a pileup anywhere, I have great confidence that I will work the station in a few calls.

I cannot say enough good things about the antenna.
K4RCH Rating: 4/5 Mar 16, 2015 07:08 Send this review to a friend
4 bands easily  Time owned: 3 to 6 months
The Quad is a great antenna to get on 40,20,15,10 quickly. Build quality is excellent. My only quibble with the Quad is the antenna connector location. I'd rather have it 90* from where it is now to facilitate an easier mounting solution for permanent installations.
N5NX Rating: 5/5 Mar 15, 2015 12:20 Send this review to a friend
Excellent wire antenna!  Time owned: 0 to 3 months
Living in an HOA, I already had an LNR Precision 40/20 antenna since I could put it up and take it down quickly. I've used it with great success.

I purchased the EF-QUAD so that I could expand into 15 and 10 meters. Since I had an existing setup, I took down the 40/20 and put up the EF-QUAD in about 10 minutes.

I checked all four bands with my analyzer, and as expected all bands had the best SWR at the low end of the band. I decided it wasn't worth trimming to tweak at this point in time since I mainly work the digital modes at the low end of the bands.

I got on 15 meters for the very first time and made contacts all over Europe during the EA PSK 63 contest.

Very happy with this antenna!
N2PH Rating: 5/5 Nov 6, 2014 07:10 Send this review to a friend
This antenna just works  Time owned: 0 to 3 months
I installed this antenna as a sloper with the matchbox up about 30 feet, and the rest of the antenna sloping down to about 12 feet. This simple antenna works great, the SWR is spot on for 40, 20, 15 and a little high but, usable for 10 meters. I am making contacts and getting good signal reports with stations and countries that I rarely heard before I started using this antenna. Simple to set up and minimal tuning-I used a MFJ antenna tuner. I told my wife this antenna has renewed my interest in ham radio!
KB1GMX Rating: 5/5 Sep 21, 2014 16:21 Send this review to a friend
Update, very good  Time owned: 3 to 6 months
I finally got the far end up to 32ft and rechecked the swr and tuning. The earlier reading were in error as I for gt the highpass filter when testing the antenna as local BCST station on 1200khz was messing with the antenna analyzer. Result is that the antenna was well matched no SWR over 1.3:1 on any band.

It performs as expected for the primary bands. The benefit is the SWR for 17M was under 2.5:1 well within the reach of transceiver internal tuners. In my install I can also get 12M at 4:1 and that tunable on my Eagle.

Simple antenna, simple install and it works.

I will recommend it to anyone.
KX6G Rating: 5/5 Aug 29, 2014 12:20 Send this review to a friend usaul  Time owned: 0 to 3 months
This is my 6th HF antenna made by LNR. And as usual, the installation and tune up was a snap. Again not situated in an ideal configuration the performance amazes me.

Anyone needing a stealthy wire antenna should consider these as they are extremely easy to tune, and provide amazing results.

The only tuning I did was on the 20 meter band which required shortening the stub by a few inches.

Why anyone would consider any other wire antenna would be crazy these things perform extremely well right out of the box thanks again to LNR for making me like it.
WB4DBO Rating: 5/5 Aug 12, 2014 12:58 Send this review to a friend
Installation and operational experience   Time owned: 0 to 3 months
I received the LNR EF QUAD and within one hour I had it hung and trimmed!  Instructions are very simple and installation is easy!  NOTE: An antenna analyzer is not a requirement but without one the job would be much more time consuming! 

First of all, the environment in which this antenna was installed and trimmed was generally open space over a lawn with no obstructions within 30 feet of the antenna. The coax end was attached to a wooden patio pergula at a height of nine feet.  The closest structure was my brick home at approximately 18 feet from the coax end. 

The far end was tied off to Dacron cord terminating at approximately 25 to 30 feet.  The wire was over open lawn with no trees or structures within 30 feet.

The antenna analyzer used to trim/tune the antenna was the “Rig Expert, Model AA-30.”

The following outlines my experience tuning this antenna for use with the CW portion of each amateur band specified for this model.  Those who operate both SSB and CW will probably need to tune differently, although, even tuning for the lower part of each band still kept the SWR below 2.1 : 1 across the entire band!

40 Meters

Setting my antenna analyzer for a frequency of 7.050 the antenna exhibited a SWR of 1.2 : 1 basically flat across the entire 40 meter band.  At the high end of the band the analyzer indicated a SWR of 1.45 : 1.  The antenna impedance indicated on the analyzer was 62 ohms.  This closely tracks the chart included in your antenna characteristic graph in the provided tuning instruction manual.  As such, I made no tuning changes to the length of the antenna on the 40 meter band.

20 Meters

Setting my antenna analyzer for a frequency of 14.050.  Using the analyzer, it indicated the lowest SWR of 1.2 : 1 was located at a resonant frequency of 13.700 Khz. Making two trips to tune the 20 meter stub I trimmed a total of two inches off the 20 meter tuning stub resulting in a 1.2 : 1 SWR.  Again, the analyzer graph closely matched your graph for a SWR across the 20 meter band of an SWR no higher than 1.4 at the high end of the band.  The antenna impedance indicated on the analyzer was 60 ohms.  The fact the lowest SWR was well below the amateur band supports the suggestion one should consider using an antenna analyzer to ascertain the true SWR and thus allowing a more accurate tuning scenario.

15 Meters

Setting the antenna analyzer for a  frequency of 21.050 the antenna analyzer indicated a SWR of 1.2 : 1 across the entire 15 meter band.  The indicated impedence was 51 ohms.  No trimming was required on this band!  The SWR graph across the band was again within the specifications included in the antenna tuning instructions.

10 Meters 

Setting the antenna analyzer for a frequency of 28.040 the analyzer indicated a SWR of 1.5 : 1 across two thirds of the lower portion of the band at my designated operating frequency of 28.040.  Toward the far end of 10 meters the SWR exceeded 2.0 : 1.  A person wanting to operate both CW and SSB could easily trim the tuning stub to achieve a SWR within limits for both modes.  Indicated impedance was 35 ohms.

Following are observations not specified or advertised with the product.

The EF-QUAD will tune in the 17 meter band with an Elecraft K-3 internal tuner.  The tuner bypass SWR was around 3 or 4 : 1 at 18.080 Mhz.  The tuner easily brought the SWR down to 1 : 1.

Also, the K-3 tuner easily brought a 10.115 Mhz SWR down to 1 : 1 - The bypass SWR was about 6 : 1.

I have not operated with this antenna - I will provide my operating impressions after a period of time.  
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