Quote:
Originally Posted by pro106import
How about signal reception. Do you notice any differences and if so on what frequency range.
Thanks for your input.
Bob
|
So far on local digital P25 systems here it has helped to get rid of audio distortion I was having before where voices would sound drunk or robotic. Now for the most part, (after 1 day of use so far) the audio is much better and not distorted. This is mainly on VHF and UHF digital trunk systems.
On conventional VHF/UHF in the more distant county here, it has helped a lot also where my reception has gone from a S2 or 3 on the PSR800 to full scale. I haven't gone into the lower bands of this antenna yet though. Mainly listening around 140-850Mhz range. Its connected to my PSR800 with about 25 feet of LMR400 Flex. I'm surprised there hasn't been any overload on the PSR800 also, or intermod. I haven't had a need to use the attenuator at all.
Having owned the diamond D130J though, I'm very pleased with what I feel are upgrades on this antenna, like the larger diameter mast which seems longer, also the larger mounting hardware. Downward rods screw in and tighten with bolts, unlike the tiny hex screws on the Diamond where you push in a rod, then tighten a hex screw to hold it in place. I never had one come out on the Diamond but when installing at a height like I am, I prefer to have larger screws since its easier to deal with. The bolts are easier to tighten and I don't fear stripping them like the tiny hex screws.
That single bolt to hold the head to the mast tube is wonderful also. On the Diamond those 3 tiny tiny screws that hold the head to the tube were a pain. So easy to drop when installing it. One of them stripped as I said also. I even prefer the design of the head on the Comet. It gets kind of concave under the down rods which seems like a better design. You can see the Comet here:
http://www.radio-sklep.pl/userdata/g...d6c1fa879f.jpg
and the Diamond here:
http://jan.kepic.cz/antenna/ANTd130j/D130-ant01.JPG
On the Diamond, those down rods are so tight to the mast where the screws are to secure it. So you had to put the rods on after securing it. I prefer to put the rods on before if possible since then I don't have to learn over the balcony to put them on and with the Comet thanks to its single bolt to attach the mast, I was able to do this. Also on the other rods on the Comet (all of them actually), they have plastic/rubber stoppers on all the ends, unlike the Diamond I had. The down rods had them on the Diamond but not the ones at the top. So another nice Comet addition.
Since the Comet came with the 60 feet of coaxial cable and even a piece of stretch tape to cover the cable connection to help keep water out, seems like it comes with everything you could need to get up and running. For some reason I thought because of this it was a cheaper made product for some reason since it sells for the same price as the Diamond here. But the Comet is a better design in my mind and seems to work as well.
Comet DS150S Discone
Linear Mode
