Diamond® Antenna ~ V2. A Tri- band Base Antenna. The V2. 00. 0A is the U.
Review: Diamond V2000 Tri Band Base Station Antenna. Introduction: I have space for only one antenna, and several years ago, I had installed a UHF CB vertical, as I. Diamond V2000A 6M/2M/70CM Triband Base Antenna Instruction Sheet Description The V-2000A is the U.S. version of the V-2000 Tri-Band Antenna. This antenna has been. Download, Diamond, Base Antenna, Brochures, Owner Manuals, in Pdf format. Diamond omnidirectional antennas. DIAMOND stationary antennas. The antenna has a higher gain with this radials and also a real 360° omnidirectional angle. Diamond V-2000 6M/2M/70CM Triband Base Antenna Instruction Sheet Description The V-2000 is a compact size Tri-Band Antenna. V2000A Tri-band Base Antenna. The V2000A is the U.S. version of the V2000 Tri-Band Antenna. Diamond® MX2000 triplexer is required for multiband operation. Diamond V2000 Antenna product reviews by real people like you. Only at eHam.net. - eHam.net is a Web site dedicated to ham radio (amateur radio).
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S. version of the V2. Tri- Band Antenna. This antenna has been optimized for the U.
S. FM Bands. The V2. A utilizes a linear phase shift design to. A watertight. joint assembly connects the two antenna sections into one rigid.
Buy Diamond V-2000 Diamond Antennas online at £79.95 from Ham Radio. Diamond products online from ML&S Martin Lynch & Sons. Diamond V2000A 6M/2M/70CM Triband Base Antenna Instruction Sheet Description The V-2000A is the U.S. version of the V-2000 Tri-Band Antenna. Modifications to the Diamond V2000 and similar antennas. The V2000 antenna uses a quarter wave radial as a counterpoise for 50 MHz.
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The resulting antenna has the same strength as a one. This is the ideal antenna for FM operation. Similar in construction. X2. 00. A dualband, the V2. A has. an additional counterpoise radial – adjustable for 6m (5. MHz only). With 6m activity, enjoy the.
Modifications to the Diamond V2. This kind of antenna has grown in. But its 5. 0 MHz design is far from optimal. Here you can learn how to improve its 5.
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MHz performance in a very easy. The physics behind the V2. A 5/8 antenna on 1. MHz. is almost a slightly loaded quarter wave on 5. MHz. So it is not very. MHz. element as a 1/4 wave element for 5. MHz. It's very easy to do.
But a. quarter wave vertical antenna antenna needs an earth plane to work. The V2. 00. 0 antenna uses a quarter wave radial as a counterpoise. MHz. This is the way its uses to get it working at the three. There are many antennas working with this principle on the market. Some of them are: Moonraker SQBM- 1. Watson W2. 00. 0, Comet CX- 7. GP- 1. 5 and Diamond V2.
This modification have been performed on a generic V2. The V2. 00. 0 and similar antennas have a tuned radial for 5. MHz. Because only the first 1. MHz 5/8 element works at 5. MHz, the antenna is not more than a rotated V dipole in this band, a rotated dipole in a way one of its arms is vertical.
The antenna was mounted about five years ago, and it has work always. On 6m I had TV (yes, I still have TV in VHF. But it has not been a.
Es, and some nice. TEP and F2. The antenna worked nicely.. The antenna had a very erratic SWR curve at 5. MHz. with many nulls between 4.
MHz. The rig's SWR meter shown the. There was no dude the antenna had a problem. My first try was to adjust the radial length, but the radial was. I tried to tune the antenna cutting.
SWR curve was. obtained. I restored the radial. Here I can't transmit on 5. MHz, so SWR. was not a problem at all.
Some time later, playing with MMANA software, I modeled the antenna. I realized what was happening at the antenna.
A quarter wave antenna. NEEDS a ground plane to work. Manufacturer do not provided a. The problem is that a vertical quarter wave. It's. a DIPOLE. But it is a problematic dipole: The dipole does not have balun, so the coax cable and the mounting. This will explain perfectly why the. SWR curve. Googling a bit, I found a message.
JA7. UDA stating the antenna is really directive, with the main lobe. MHz radial direction. This was the confirmation for me.
V dipole on 5. 0 MHz. V2. 00. 0 simulation on MMANA. As you can see, the antenna's lobe is. This is the directivity noted by. JA7. UDE. This situation can produce many effects, but for me the principals are: 1.- The antenna works randomly, It depends on the installation place, mounting hardware, coaxial cable, etc, etc.. The polarization of the antenna is also random: Vertical at the. A dipole without a balun makes the coaxial cable (and mounting hardware in this case) to radiate.
This is a real problem! As a experiment, I replaced all the antenna radials with full size.
MHz radials with the hope to convert it to a real. The radials were made with aluminum tube, a screw. The total length was 1. More details at the next image: The new radials in detail. This is. only one of the multiples choices we have to make them. You can also. tweak the antenna tuning adjusting their length.
Make sure all three. Results were much better than I could never expect.
The SWR curve is. MHz groundplane antenna: 1. But for me, the main advantage is. This is a. great advantage when you are located only 4. Km away from a 2. KW TV. channel 2 transmitter!!!
The previous TV noise of 9+ is now reduced to. S1- S2, and now some real weak signal can be heard, like meteor. Es. No changes were noticed in operation and performance on 2m and 7.
Just as before the modification. The modified V2. 00. If you have this antenna, and you are not happy with its performance. I described here. Its cost is under.
On November 2. 4, 2. MHz band, with the TV still on air, so the antenna helped a lot to work some interesting DX because of the high attenuation of the cross polarization. Later on April 9, 2. EA- TV transmitter (4. MHz) was turned off so the band become clean with just the usual urban noise. Using no more than 1. W I have been able to work stations in north, middle and south Africa, Middle East, North and South America and of course, all Europe, so the antenna works as expected.
I also have received e- mails from other hams who had great success with the modification, but I received also some e- mails from hams who had very bad results from it. Looking for "V2. 00. Internet, you can easily discover there are many "V2. Ones are single piece fiberglass, others are split in two pieces.. Electrically most of them are quarter wavelength antennas (the one needed for this mod) but there are other who seems to be configured in a different electrical arrangement. On these antennas the mod does not produce any advantage.
In fact it used to produce a lot of SWR and makes the antenna unusable. What do I mean? There are many chances this modification could improve your V2. Anyway I encourage you to test the mod.
If it works, the performance of your antenna will be much better. It will worth it.