| N8TT |
Rating:  |
2024-08-22 | |
| Light, effective, needs help, and will eventually die |
Time Owned: more than 12 months. |
Good antenna. Flat gain and swr (except for a bump near 26 MHz prob. due to boom resonance). Lasted almost 20 years up high in Michigan WX. Eventually, elements started to break off. To have the T10 last so long the boom splices were overlapped with SS plates, and a strut was used. Must use anti-welding gook on the SS screws holding elements together. Took a lot of time to assemble, as one expects with so many elements. Without splice-plates and strut, a ten year life is expected. When one needs bandwidth, LPDA delivers.
Added: Was erected in October 2001 - survived Michigan Winters and wind. Next to the largest element became detached -cause is unknown. A piece of one of the shorter elements broke off - no doubt due to material failure - I have seen that happen. Boom splices were reinforced with SS plates - two struts were used - other than loss of element, it is still in good shape. A coax choke was used as good balun was not available. Replaced T10 with JK Antennas (five two-element-yagi) late August 2024. Cost of the replacement antenna was a small part of the cost of riggers needed safely to replace antenna. |
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| K1LNC |
Rating: |
2016-06-13 | |
| T10 vs T8 |
Time Owned: more than 12 months. |
I have had both the T8 and T10.
The good news....low swr from 14 to 30 MHz, about 6dbd across those frequencies, adequate F/B and outstanding side to front, no traps (to screw up) which reduces the diameter of the elements dramatically and dropping the weight.
The not so good news. My T10 started dropping elements about 8 months after putting it up. The sheet metal screws just don't stay put.
All that said I would buy another T8. The difference in cost between the T8 and the T10 does not justify the T10's longer boom, extra weight, wind loading, etc. The performance of both is so close...buy the T8.
Now--I have had triband yagis, cubical quads, monoband yagis...and I have to say that this antenna outperformed all of them--covers all bands from 20 up with one coax feed and is one helluva antenna for the price.
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| KI5WE |
Rating: |
2010-10-25 | |
| my favorite antenna |
Time Owned: more than 12 months. |
| This is one GREAT antenna... it is the one I use the most,the antenna is dead flat on all bands we put it together in about 2 hours then up the tower at 72 feet. I get great reports 59+20 all over the world most of the time. the price is very reasonable for the antenna,the quality is excellent, (please read the instructions first) and you will have no problems. this antenna has out preformed all of the other antennas i have had in the past, think about it it has 3 elements on 10-12-15-17-20-30 meters. the service is second to none... shipping is fast the owner is very truthfull. and easy to work with. for the price you can't beat this one...KI5WE |
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| DL9RDM |
Rating: |
2009-12-14 | |
| After 15 years |
Time Owned: more than 12 months. |
es, you see correctly, I have this Antenna now 15 years on top of my tower.
I do not want to bore you with comments such as, worked country XX with 100Watt and get 59++...
But i like to give you more technical informations.
Gain:
On my computer simulation we can see that the Antenna have approx. 4,5dbd = 6,64 dbi Gain.
This is realistic if I make an A/B comparison to my dipole.
Front to Back
Well, I made a lot of F/B test on each Band and also with DX and local stations.
The result is approx. 5 S-Units on a non calibrate S Meter. In reality thats 15-20db F/B (deepens on the Band)
SWR
The resonant frequency was to low on each band. I modified all the elements in 1997 after this modification the SWR was max. 1:1,4 Remember I have the old Version of the T-10 "Eagle10"
Feeding:
don`t use a coax balun. It is better to use a current Ferrit Balun.
See my web page.
Service:
3 from 5 Points
After 15 years I made some maintenances on it, so the Antenna will be ready for the next 15 years ;-)
Best Regards from good old Bavaria - DL9RDM - Mark
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| WA4BHK |
Rating: |
2007-12-18 | |
| Not strong enough to withstand moderate winds |
Time Owned: more than 12 months. |
| I've had this antenna up for 6 years on a 72 foot tower. Until 6 months ago, I had no problems with the antenna other than some boom sag due to the antenna not having any type of center boom support assembly. About six months ago during some moderate winds, one of the mid boom elements broke off approximately 12 inches out from the boom. This past Sunday, we had 30 mph winds with a passing cold front and another mid boom element broke off 6 inches out from the boom. In my opinion, some of the elements of this antenna are not strong enough to withstand moderate much less strong winds. Seems like the antenna should last more than six years. |
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| NX7DX |
Rating: |
2007-10-27 | |
| nx7dx-nelson. R |
Time Owned: 6 to 12 months. |
| hi I been using T10 for 6 monts sofar super antenna, no preblemes. rememver is a log peruiodic not a yagy most of the times is operator not reading carefull instrations like ME.OK WORK VERYGOOD AND FLAT SWR ON 10-12--15-17-20-2mt- 6 mt 1.3.1 swr . PS. IF YOU USE A TUNER THIS ANTENNA IS VERRY GOOD ON 40 MT.AND 160 MT BELIVEME IT WORK AS GOOD AS MY 663 FEETS LOOP .ON 160 I GAT A 60 FTS CRANKUP TOWER ANTENNA IS ON TAP AND FEED POINT IS ON ANTENNA NOT ON TAWER OK. I COMPER SIGNAL REPORT WITH STATIONS RUNNING POWER AND I USE 100 WATT AT THE TEST A DIFERENT WAS 59 ON 100 AND 20 EVER 9 ON 1200 WATTS ,COMPER ANTENNA SIGNALS WITH A 4 ELE.36 FT BOOM MONOBAND AN I GOT 1 S UNIT MORE ON 20 MTR. REMEMBER I/m talking abouth T10 ORIGYNAL I SAUME ALL NEW ARE BETER THAN MY T10. GOOD LUCK AND REMEMBER READ INSTRACTIONS THIS ANTENNA IS DIFERENT AND SUPER FENOMENAL . LOOK LOOK .WORK VERY GOOD ON 40/ 160 METER WITH A PALSTAR TUNER 73 AND GOOD LUCK |
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| W1CTN |
Rating: |
2007-08-30 | |
| A good antenna |
Time Owned: more than 12 months. |
I have owned my T10 for just over 4 years and it has proven to be a good directional antenna for 20-10 meters. I base my conclusion on what it replaced, a Mosley CL-33, which I feel had the same performance, but no coverage of 12 and 17 meters.
My T10 is at a height of 52' feet and is rotated by a Ham 3 rotor. I feel this rotor is adequate for the job.
I have found that the F/B is at least what Tennadyne publishes in its literature. I have confimed this with stations locally and at over 1500 km away. I feel the gain is the same I had with the Classic 33. ~5 DB.
The SWR is under 1.5 to 1 from 20-10, with the exception of 12 meters, where it hovers around 1.7. It's flat 100 khz under the band. If anyone has a element length change to make it flat in the 12 meter band, drop me an email.
It is a very rugged antenna and has survived 4 winters, all of which have had at least one ice storm associated with the season. Element ice up, bow a little, thaw out and spring back to shape.
Construction of the antenna is pretty good and this makes assembly pretty IP (idiot proof). There are no moving parts, it's a straight forward design with no traps to toast with excessive power or become home to your local spider population, the pre-drilled double boom makes it a no brainer as to the element spacing.
The T10 is a good all around directional antenna, with consistant f/b and gain from 20-10 meters. If you are looking for razor sharp directivity and 4/5 element gain, look elsewhere, this antenna is not for you.
I like it and it makes my home look like an embassy ! Drop me an email if you have any comments or questions.
73
Dave W1CTN
w1ctn@yahoo.com
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| N8FR |
Rating: |
2007-07-08 | |
| This antenna really plays! |
Time Owned: 0 to 3 months. |
This antenna is a winner. Jeff (WD8DLK) and I put it up at 80feet on Memorial Day. I have used it about 6 hours and worked abouy 30 countries. Most of these contacts were on first or second call.
By the way, it plays very well on 6 meters, both locally and on skip!
SWR was 2:1 highest 6 feet off ground, and is 1.4:1 highest on the tower. No tuning anywhere from 14-54 mHz.
Assembly is rigorous and somewhat subtle. It took me one sunny day. The manual could use some additional explanation and pictures. The owner, Rog, was very helpful, and drew me some additional diagrams in response to my questions.
73,
Fred
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| W8RAN |
Rating: |
2005-08-19 | |
| Wonderful performance! |
Time Owned: more than 12 months. |
| What can I say but great! It's been up a year now and it has worked perfectly. It withstood an ice storm which left 1 3/4 inches of ice on it for a week last Christmas. Finally melted and sprung back up. It's a keeper. |
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| ZL4PO |
Rating: |
2004-09-23 | |
| Best HF antenna I have ever owned |
Time Owned: 3 to 6 months. |
Good things come in small packages ! Surprised
that such a big antenna could fit in a 6 ft long
x 6" x 6" cardboard box. Shipping to New Zealand ex Tennadyne USA went smoothly and was
timed to coincide with the week I was going to
be in Christchurch, the entry port in N.Z.
The instructions are concise and well detailed;
Construction I found was not intuitive, but after a few false starts I found assembly was straightforward. All drilling and element fittings were accurate and the antenna went together well. No element end bungs were supplied so I purchased these for both the element tips and the boom end of the elements.
I did not put boom plugs in however, as water
ingress in the boom is normal and has to be allowed to escape. The antenna still makes quite
alot of whisting in the wind however, even with the element tip bungs.
I used 2" lengths of glued heatshrink over each of the element joins, just enough to cover the
actual join and the s/steel PK screw.
I sealed the Collins balun pigtails with
glued heatshrink, then a covering of denso
(petroleum grease) tape just to be sure.
Make sure the braid side of the balun goes
to the underside of the boom, as this minimises
the risk of coax cable puncture-voltage breakdown.
The boom to mast clamps were supplied without
a backplate, so I manufactured these and had them
hotdipped to give extra strength to the plastic
boom to mast insulator block. It has not slipped
in the three months it has been up, despite some
strong wind gusts
Tennadyne state "Do not use Anti-oxide greases on this antenna" without giving a reason, but I thought about it and concluded that the use of
any such product on the boom especially might
alter the velocity factor, and therefore the
phasing of the whole array!
I did a test setup at about 15 feet above ground, but the longest elements drooped quite abit so my test measurements using a Bird 43 & IC706 were inconclusive; SWR plots were quite high but I decided not to do anything to the antenna as I
felt sure the antenna would resonate when it was raised to the operating height at 23M up the Rohn tower.
This proved to be the case: Fed with Andrew
FHJ4-50 Heliax and SWR measurements in the
shack using a Bird 43 were as follows:
14.0MHz 1.25:1
14.1 1.15:1
14.2 1.075:1
14.3 1.075:1
18.0MHz 1.39:1
18.1 1.3:1
18.2 1.3:1
21.0MHz 1.58:1
21.1 1.48:1
21.2 1.12:1
21.3 1.11:1
21.4 1.39:1
24.8MHz 1.39:1
24.9 1.46:1
28.0MHz 1.11:1
28.1 1.48:1
28.2 1.52:1
28.3 1.58:1
28.4 1.58:1
28.5 1.6:1
28.6 1.6:1
28.7 1.58:1
28.8 1.55:1
28.9 1.52:1
29.0 1.4:1
29.5 1.15:1
Nominal maximum SWR specified by Tennadyne is
1.7:1, so it is well within spec on all bands,
although perhaps the 10M element #9 could be
increased in slightly in length so that SWR
figures would be better for the lower end of
10M band, Instead of the high end of 10M band!
Some experimentation is called for here but my
tower is not tiltover.v
On air results have been great. I am consistently
getting reports of big signals into EU and USA -
and compared to my old 3 element trapped triband yagis this antenna is a winner.
For instant QSY's across 5 HF bands, an antenna
with no traps to compromise bandwidth or go wrong, I recommend this antenna highly. Maybe
a two element five band quad would beat it, but it is a lot harder to get a quad up and keep it up if you dont have a tiltover tower
please email me with any comments
or questions: zl4po@xtra.co.nz
73
Lester ZL4PO
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