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| Reviews Summary for Diamond CP6 multi-band trap-vertical |
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Reviews: 37
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Average rating: 4.1/5
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MSRP: $320
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Description: The CP6 is a multi-band trap-vertical antenna for HF bands, covering the 80*, 40, 20, 15, 10 & 6m amateur bands. Made from heavy-duty aluminum, the CP6 is easily assembled, yielding excellent performance and reliability from a compact base station.
*80m CW only. SSB requires a tuner.
antenna.
This product has been discontinued.
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Product is in production.
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More info: http://www.rfparts.com/diamond/multi2.html
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write your own review of the Diamond CP6 multi-band trap-vertical.
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EI5KF
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Rating: 4/5
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Jan 16, 2012 11:18
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Diamond CP6
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Time owned: 6 to 12 months
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CP6 cont'd......
After problems found with traps, contacted Diamond Japan, with issue of QC. New trap shipped with correct construction.
Thanks Diamaond
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EI5KF
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Rating: 2/5
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Dec 27, 2011 16:51
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Good antenna, poor QC from Diamond
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Time owned: 3 to 6 months
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I purchased a CP6 in July of 2011. After getting my licence in August, I commissioned the antenna and worked satisfactory on 5 band (no tx on 6m)
After 2-3 months noticed a change in VSWR on most bands above 10m, then 10m when bad.
Eventually, I got the antenna down and checked the antenna out. Sure enough, O/C in the 1st trap. Dismantled antenna and trap. Found broken connection on bottom of 10m coil and bottom of 15m coil at earthing point. These breaks were basically down to bad design and construction of the trap. Only 2 rivits are used to secure the trap insulatated former to the aluminium sections. These rivits are only seperated by 45 deg, which results in a lot of play and movement of parts in the wind and snap! If Diamond had put 4 rivits at 90 deg spacing, no issue. Drilling thru and puting extra rivets solves the problem, re-assemble and away you go.
Now you have a damb good antenna which does not need a ground and is suited to restricted spaces.
With this modification done, I would give the antenna a 5, but as it is bad QC from Diamond it gets a 2.
Best Regards,
EI5KF
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F4FYJ
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Rating: 3/5
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Nov 14, 2010 13:08
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Just for 10,15 and 20m
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Time owned: more than 12 months
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I boutgh a Diamond CP6 antenna last year for portable activity.
Just good for 10/15 and 20m very poor on 40m , 80m unusable.
too short for 40 and 80 ,narrow bandwidth need antenna tuner.
Replaced by G5RV "junior" 40 to 10m (inverted V)
Good :
when have not place
when just one shrot antenna is possible
One coaxial wire
roof of hight building
work fine on 10/15/20m
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IZ0IRH
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Rating: 4/5
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Sep 20, 2010 04:32
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Good antenna with restrictions
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Time owned: more than 12 months
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Bought it one year ago: It's easy to mount, no problems with SWR.
Of course one has to be aware of this antenna's limits, as it is a short vertical trapped antenna
Pros:
- good for restricted spaces
- good quality of materials
- easy to build (but not to maintain, see below)
- good efficiency and 1:1 SWR from 20 mtrs up
- it's cheap
Cons:
- very poor/poor on 80 and 40 meters, bandwidth is too small, and so is it's efficiency
- noisy as many other verticals GP
- not very convenient: if you want just to replace the coax cable, you need to dismount the entire vertical beam. Not very practical.
In a nutshell, a good product for beginners, or if you do not want to spend more money.
73 de Mario IZ0IRH
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2E0TZM
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Rating: 5/5
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Sep 10, 2010 06:12
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Spot on
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Time owned: 6 to 12 months
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I bought one of these off ebay 9 months ago to use at home was so inpressed found another for /p operations, they work very well for me easy to set up, would buy again.
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M0CRU
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Rating: 0/5
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Jul 15, 2010 00:08
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JUNK
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Time owned: more than 12 months
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good points- its an antenna
bad points- its junk, £300 junk.
you could make better out of wood and string, the build quality is very sad, dry joints in all traps, you need a good set of ladders, because you spend more time on the roof fixing it than you transmit on it.
ok for portable.
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EI4GMB
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Rating: 2/5
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Jun 27, 2010 12:11
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Too many problems !!!
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Time owned: 0 to 3 months
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The Diamond CP6 multi-band trap-vertical came highly recommended when I bought it. It was the first antenna I purchased as a radio amateur and suited my limited space location.However, It had a number of problems:-
1. It is an omni-directional antenna and was also very noisy.
2. It gave out a poor TX Signal(almost 3 S Points down on my G5RV Jr.)
3. It could not withstand strong winds leading to
the solder tags on the trap coils snapping.
4.The traps themselves had rivets which were virtually impossible to remove so as to repair the coils.
5.The Antenna required a lot of maintenance.
Overall, I was very disappointed with the CP6. Strong winds eventually damaged the trap coils beyond repair and I finally took it down!!!
My advice would be if you can fit a G5RV Jr into your lot do so, It will perform a hundred times better than the CP6!!!
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M6GOM
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Rating: 3/5
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Apr 17, 2010 13:02
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Serious build quality issues.
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Time owned: 0 to 3 months
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I bought a used one at a radio rally. Upon getting it home and trying to tune it in, it was obvious why as it would only tune 6m. Thankfully the internet has been created and a quick search revealed the first trap as the cause.
I repaired the first trap. Seriously abysmally poor construction. One solder tag had snapped, I suppose it was because the securing rivet had stretched and the whole trap slopped about. Went about fixing it and its 1000 times better.
Which brings me onto the second complaint. I don't think its actually possible to find a softer metal to use for the radial rings. How anyone manages to screw in the radials without ripping out the threads is beyond me.
Anyway, performance. I have a monoband dipole for 20m at 5m AGL and a Little Tarheel with a 66" whip on. 80m is too narrow to be usable. Performance on all bands is equal to my Tarheel. By equal, I mean IDENTICAL on side by side comparisons on my Kenwood TS-480 (2 antenna sockets) both on RX and TX (TX to station in USA from UK, 3500 miles approx with 50W). On 20m, I compared it to the dipole using my Yaesu FT950 (2 antenna sockets). Up to around 2000 miles, the CP6 was 2-s points down on both TX and RX reports. Contacting a station in Washington State, around 3500 miles, a side by side revealed the CP6 slightly stronger (both S9) but the operator said the audio was quite louder and easier to hear on the CP6.
So there you have it. Its not bad if you ignore 80m but the build quality is seriously dire for an antenna now costing £300 in the UK. I'm just glad I bought mine second hand. I'd have been in tears if I shelled out £300 for that.
After my experience of the Comet H422, I'd say that if you don't mind losing 80m, go with the Comet H422. Its a far better performer and WILL tune up on 6m even though it doesn't say it does.
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ON4XA
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Rating: 5/5
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Nov 15, 2009 03:39
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choose yr bandlarge
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Time owned: more than 12 months
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Hi to all, I writed allready a review about it. Now it's 4 years I have same CP6 and it works great. Even on 80. Even on 80 phonie. You have just to find the good mesuring, because the bandlarge is not vy high. His minus point is the power. When Diamond will make same antenna accepted 1Kw, it will be the Rolls Royce of vertical multiband antennas. I am vy vy happy with it. Diamond, you're the best. Thanks for this antenna. 73's Xav ON4XA
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IZ1GCN
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Rating: 5/5
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Jul 5, 2009 06:00
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IZ1PON
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Time owned: more than 12 months
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Ease of installation.
SWR bands within 1.1 machined.
Ideal for urban condominiums and installation on or in conditions of limited space available.
Proven with YAESU FT-DX9000 exciting combination.
Proven with YAESU FT-897D / I combination exciting
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