- This topic has 15 replies, 9 voices, and was last updated 5 years, 6 months ago by Anonymous.
March 12, 2015 at 10:33 pm #887LNR adminKeymasterMarch 18, 2015 at 5:18 pm #916KD2HUEParticipant
Initially, very pleased with my EF-Quad. However, some issues came up.
Most of my SWR measurement readings were great, except for 10M, which were too high for SSB.
So I started clipping the 10M stub, getting the SWR there down to acceptable levels.
But now everything is skewed for 20-40M. SWR levels are much higher than they were before.
Ack!March 30, 2015 at 11:06 pm #920QRPMEParticipant
What is “much higher than they were”? Can you give me some numbers?
If you trimmed the 10 meter stub without setting the 40/20 first then you will have skewed 40/20. First get 40 meters correct. Then 20, then 15 and then 10.
In my experience I haven’t had to trim any of the stubs once I get 40 correct.
That may be because I tune for the low end of the band in the CW portion.
Can you tell me what “Much higher” is?
In other words if it went from 1:3 to 1:8, that’s not much.
Really anything below 2:0 is ok with your rig.
Let me know how it’s working out for you.
Randy_KB4QQJApril 20, 2015 at 7:58 pm #930KD2HUEParticipant
Thanks for the reply. And apologies for the delayed return.
First, (and should have said this beforehand) I got my General ticket just two months ago. And my Tech a month before that. Prior to that, did RX with my Icom R75 & the EndFed RX antenna, which I liked very much. Opened up the HF world to me, and pushed me to get my TX license.
I will likely always be a PH person. So when I got the Quad, I also bought a good antenna analyzer & did some comparisons. For voice, 40, 20 & 15m SWR were very good. 1.5 or lower. But 10m was almost 3.0. After I trimmed the 10m stub, it went down a bit, but the others appeared to creep up a bit.
Afterwards, went out again, did more analysis, and did some additional trimming of the 10m stub. The others stayed in the 1.2-1.5 SWR area, and 10m dropped to 2.1.
Guess I was afraid that the Quad trimming was initially not behaving the way I expected. But its all good now.
BTW> participated in this past weekend’s ARRL Rookie Roundup. Got my TenTec Eagle out as far as Washington state on 100W. Plus, have previously contacted the Caribbean & western Europe.
I will never have a tower in my backyard. (Wifey sez a big NO!) But the Quad is really good. Very good w/ RX as well. As good as advertised. I’m happy.
KD2HUEMay 31, 2015 at 8:13 pm #980
Another question about the EF-Quad, are the stubs already attached at the approximate starting lengths along the main radiator? or is it random? At what lengths should each of the stubs be placed from the matchbox (for 20m, 15m and 10m)?
I don’t see where I could have added this question as a new post!June 9, 2015 at 1:26 pm #1000
Got my answer with a call to LNR, the stubs are attached at the right lengths. I just got back from a camping trip yesterday and only got 1 day to use my EF-Quad antenna due to the rain.
I got the antenna tuned to 1.2:1 on 40m, 1.2:1 on 20m, 1.3:1 on 15m and 1.6:1 on 10m. All within my allowed operating frequencies (General Class). Was already at 1:1 on 40, 20, 15 and 1.3 on 10m but not in my operating frequencies.
Used an arborist throw line to get the radiant end of the antenna into a pine tree about 40-50ft off the ground and got the matchbox about 1.5 ft off the ground. Running a Yaesu FT-857D on battery power and man did i make some contacts. It happened to be the weekend of Navy Ships (June 7th) on 20M and i got through the pile ups with no issues at all. I haven’t been able to do that with my base rig (Icom IC-7410) and this set up got through without a hitch.
I was at Woods Canyon Lake 30 miles due East of Payson Arizona and made contacts in Bend OR, St Paul MN, Lincoln Nebraska, Wisconsin, Louisiana, San Diego CA and the LA area and a few others. All were 58 reports or better and again, can’t say it enough, i got through some massive pile ups during this special event weekend with the Navy ships. This is a keeper in my back pack for anything on the go! If I could I would make that my home antenna but can’t due to CC&R’s…
IF you want any more details feel free to contact me.
email@example.comJune 21, 2015 at 12:13 am #1022N5VXParticipant
What I’m about to say is NOT useful information to those that may be having trouble with their antenna, but I just wanted to say that after almost a year, I’m not. I bought mine at Huntsville last year when they were first introduced. I brought it home, put it up 21 feet at both ends, didn’t tune it or do anything else to it and its SWR has been negligible on all bands since. I’ve worked the world with it and just love it. I highly recommend it and hope those that are experiencing a few problems are able to get them solved soon. Now if they’ll only build a 600W version. 🙂June 29, 2015 at 12:01 pm #1030
Continued feedback 6/29/15……….
So, I used my EF-Quad for field day this past weekend (6/27 and 6/28). We were located in Central Arizona, on the Mogollon RIM at 7000ft. The area was off Fire Road 300 in a remote location about 45min NE of Payson AZ.
I couldn’t be happier with a wire antenna. I had it strung up as a sloping antenna. The radiating end was about 30 ft off the ground, suspended by nylon cord that I got into a pine tree using an arborist throw line, worked awesome. The match box (coax end) was about 2ft off the ground, also suspended by using a nylon cord that was tied off to the base of a tree next to my tent. On 20M band I made contacts in Maui and Honolulu, Puerto Rico, Vermont and about 20 other states but the most important and significant for me was the Navy officer on board the USNS Mercy, a Navy hospital ship that was off the cost of Papua New Guinea. Google map puts it at 7299 miles. He pulled me out of the crowd with a S3-4 report. Working at 100 watts on battery power I was thrilled. I also had another antenna known for it’s performance but I kept coming back to the Ef-Quad due to the quality of the TX and RX signals. FYI, I was not asked to give feedback but feel it’s warranted due to the outstanding performance of this antenna.
firstname.lastname@example.orgJuly 10, 2015 at 8:37 am #1045k4rhgParticipant
My EF-Quad tuned up nicely on all bands with no adjustments. I did not connect the ground lug though as it was mounted high and at the time it wasn’t convenient to run a ground wire. There’s nothing in the manual about the grounding. How important is it to ground the EF-Quad?December 7, 2015 at 9:22 am #1413pavelftParticipant
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