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Reviews Categories | Antennas: VHF/UHF+ Omnidirectional: verticals, mobile, etc | Diamond D-130J discone Help

Reviews Summary for Diamond D-130J discone
Diamond D-130J discone Reviews: 33 Average rating: 4.7/5 MSRP: $79
Description: 25-1300 MHz Continuous Coverage Super wideband antenna
Product is in production.
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VE9DAN Rating: 5/5 Jun 4, 2015 03:01 Send this review to a friend
Works Very Well  Time owned: 0 to 3 months
I just installed a brand new, shiny D-130J. Yes a wee bit tedious to put together as previous reviewer said, but not at all bad. The model number implies an SO-239 connection.
All components are stainless and I was afraid the small set screws would 'gall' and seize. For each threaded connection I applied Penetrox ... an electrical conductive paste.
I live beside salt water, so the paste may also help to prevent the ingress of salt into the assembly.
The antenna works very well on my AIS system (APRS for ships) and yields simplex signals from 80+ Kms away regularly. It is mounted about 16 feet above ground near sea level.
Due to my location, I have no real plans to use it for transmitting (I use a beam to get to the repeaters). I do like the omni-directional aspect of the antenna, and plan on tieing it into my scanner in due course, along with the addition of a pre-amp.
If your location and circumstances are similar to mine, then I would have no problem in recommending the unit.
KB6DRN Rating: 5/5 Mar 10, 2015 09:49 Send this review to a friend
restricted Space Transmit Antenna  Time owned: 3 to 6 months
I'm using the D-130J Discone Antenna as an transmit/receive antenna for my four mobile FM radios mounted on my Ham Bench. The radios include 6 meters, 2 Meters, 1.25 Meters and 70 Centimeters. The radios are combined via 3 Diamond mobile duplexers/triplexers onto a single coaxial cable feeding the Discone Antenna.

The discone antenna is on a pipe which is just above the roof line of my house and works very well. The SWR remains between 1.25:1 and 1.50:1 on all four bands and accesses repeaters between 80 & 100 miles away - 90% of them worked at Full Quieting Levels. I was also impressed with the construction of the antenna which is far better than a Radio Shack discone I've previously used.

Had I put up 4 monoband antennas rather than the single "frequency multiplexed" discone system, I believe that my $400 dollar cost for all materials would have doubled and of course, my backyard would be full of antennas and peering, sneering neighbors. It's also interesting that I could add 900 MHz to the antenna system with the addition of another mobile duplexer as the discone provides low SWR from 50 MHz to 900+ MHz.

While I wouldn't recommend this antenna for VHF/UHF DX work, It's a perfect antenna setup for a restricted space environment and communicating with Ham Repeaters.
K6MTS Rating: 4/5 Jul 7, 2014 00:35 Send this review to a friend
Pretty good cover all antenna  Time owned: more than 12 months
Works great. My only issue is the design is a bit silly. The way it was designed (use and placement of tiny screws, washers, and set screws, along with their relationship to the radial position, makes it tedious to put together and take apart to move.

Also could easily have been designed to be more mechanically sound as far as how it mounts to mast.

5 for performance, 3 for user/installer friendliness, = 4.
K5AHH Rating: 4/5 Jun 6, 2012 17:58 Send this review to a friend
Good Antenna  Time owned: more than 12 months
--I owned one of these antennas for five years. It's just about comparable to a quarter wave. A 2 meter signal that was S7 on a quarter wave was an S6 on the discone. Virtually the same results on 70cM. When used on 6 meters, the SWR on my antenna was 1.7-2.5. Not great, but acceptable. My Cushcraft AR-6 works much better (as it should). On both 2 meters and 70cM, SWR ranged anywhere from 1.2:1 on up to an acceptable 1.9:1

--Easy to put together. I've read several places that the lower elements, or the "cone" are solid, but mine were hollow. This was not an issue, though, in my opinion. Some of the hex nuts had rusted that hold the "cone" elements after a few years.

--While this antenna, at least in my experience, doesn't seem to "hear" as well as a quarter or half wave antenna, I would recommended it to a scanner user. It works fairly good for RX from 44Mhz to 467Mhz, such as low band Highway Patrol (44Mhz in this area), 6 meter amateur band, 118-136Mhz aircraft, 2 meter and 70cM. No other frequencies were tried. It sure beats having individual antennas for all the bands this antenna covers! I ended up giving the antenna away to a friend and I put up a beam. I've been thinking of buying another and putting it up at work.
KD0JCW Rating: 5/5 Dec 30, 2011 15:42 Send this review to a friend
Works Great  Time owned: more than 12 months
I have been useing this antenna for some time on a tripod in the spare room inside my apartment on 2 meters. I hit repeaters 20 miles away on 4 watts! Iam now tunning it for 6 meters its a little work but Iam getting the SWR down slowly. The SWR on 2 meters is about 1.1to1 with 4 watts. It works better in front of a window. I use the RG58 coax. RX great inside. On a tripod it fits in a corner if not in use (little space needed to store). I have tried 25 watts talked about 35 miles on simplex for short time the SWR was about 2to1 But maybe RG8X coax might help that.
NI6S Rating: 5/5 Aug 28, 2011 12:43 Send this review to a friend
Reliable  Time owned: 6 to 12 months
I have had mine up for some time. I use a cross brace on my tower, 4 feet off the third section, putting it at 55'. I feed it with LMR600 and use N Connectors. This antenna consistently gets great reports on 2m simplex and hears well on other bands too. The key is in the height and the feedline. These two factors will allow you to realize its full potential. No issues and SWR is flat across the whole spectrum. Buy one of these! You won't be sorry.
AE6ZW Rating: 5/5 Jun 18, 2011 20:58 Send this review to a friend
at least 10 years old, still good.  Time owned: more than 12 months
I got my D-130 discone from my old works, several years ago. I have used it for a while until I got ARX-2. I think this antenna was up on the roof used more than 10 years before it come to me. it is still is good shape. no rust, aluminum looks oxidized a bit, but that is normal.
SV1EEX Rating: 5/5 May 15, 2011 23:12 Send this review to a friend
Better than the competition  Time owned: more than 12 months

I've used this antenna for the last 2 years. I have attached a 1/2" heliax line on it because I operate mostly on 1296 Mhz band. The antenna works in TX as declared on 6m/2m/70cm/23cm. It has lasted without corrosion and rust heavy winters while similar product got rusty after the first rain. I have also managed to make 10m contacts with tuner. Wx leo sats were piece of cake and so did most leo sat beacons. It is not a yagi but it is a highly recommended antenna.
KC9MLA Rating: 5/5 Mar 2, 2010 18:48 Send this review to a friend
Same as the Icom  Time owned: more than 12 months
This antenna is excellent for receiving. The radials do not fall off. They are not properly tightened by the installer. I live in the Western Suburbs of Chicago. Snow, winds, and ice, yes we get it all. This antenna has never failed me. There is nothing better in this price range. Our government use these. For the facts, I am using a Icom IC-R7000 with some LMR-400 cable. It is mounted on a 10 foot pole on my roof. I recommend this antenna to all.
N6HPO Rating: 5/5 Feb 1, 2010 16:42 Send this review to a friend
Excellent 'Cone For The Price!  Time owned: more than 12 months
I bought a R/S discone and the first 50 MPG gust that hit, it took me two days to find the radials! I then bought a Diamond Discone. All stainless and in 2007, it took 85MPH gusts and was still standing tall the next day. It receives and transmits extremely well, particularly over the hilly terrain I have surrounding me.

The 800 Meg band comes in great. The addition of the whip helps greatly in pulling in the CHP from anywhere within 140 mile radius from my QTH. Freq's from the low band CHP to the CalFire 800 Meg band are all received Q-5 and S-8 or better. Up here, reception is more than a hobby, it's a fundamental necessity!

I'm sorry to hear that others have found the antenna to be less than advertised. I live in wildfire country and hearing the CalFire/USFS comms has always kept me way ahead of the curve during emergency situations here in SoCal. The D-130J has never let me down. Mine is fed with Belden 9913.

BTW, the Diamond Discone [D-130J] will receive and transmit on 220 MHz also; something that they don't list in the advert. I used it that way for several years with great success until I put up my 5 element Yagi. The discone's available with a PL-259 or "N" connector.

If you do buy one, be v-e-r-y careful with those small Allen head s/s screws when you mount the radials for the disk & cone. The supplied wrench is small and if you drop one of those little screws, it's a long way down that ladder, hi!

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