Assuming no other changes than the antenna I think you may find them quite disappointing as in none you can detect.
I think it may be time for me to do a comparison video and put this one to bed. I did a comparison between a 1/4 wave 2m antenna and a 5/8 2m antenna to a repeater 55 miles away from where I live and found no noticable difference. I now have a 1/4 wave 2m antenna on my car. Going on the claims made on this forum about the differences between various 1/2, 5/8 and .64 wave antennas I should have been seeing several S points yet not one was noticed.
If you're not going to see a difference between a 1/4 wave and a 5/8 wave you're not going to see a difference worth a toss between the various 1/2, 5/8 and 3/4 wave vertical antennas you can buy, certainly not one worth spending money on if performance improvement is your aim.
And I've seen enough CB antenna comparison videos on Youtube with claims of "is a 1/4 of a S point better" claims to feel vindicated in this point of view.
Antron A99 vs Sirio Gainmaster. Pretty much exactly what I expect.
Hi again Eddie,NB, how are you coming along on your Saluite rebuild?
Needle Bender.......no offense but if you are seeing that much gain over a 1/4 wave then you should patent the antenna and make millions because even professional antenna design engineers can't do that simply by changing out the antenna and leaving all else the same. If the signal is in a null and the null moves with a change in antenna design then YES it can make that much difference but that is not really because of gain overall. Gain should always be measured at the horizon and that will make very little difference in gain figures from a quarter wave to a 7/8 wave. As for the 1dB making the difference, it would on FM with the capture effect but not so sure on AM or even SSB unless the signals were barely there on a quiet band. Back in the 70s and early 80s there was a bunch of us all around the province that would get on late at night and try various antennas and comparing omni verticals never did show much difference at all over paths of 75 to 100 miles.
LOLYou are confusing radiation patterns with absolute gain. Sure the patterns hug the ground further out but the DIFFERENCE in gain figures is not that much.
On edit: What you are essentially doing is lowering the angle of radiation to better cover the horizon without a big difference in gain. I and many others have always said not to worry about the gain or where the peak is but worry about where the nulls are.
LOL
Last time I checked, no antenna produces RF, only radiates the RF which the power amplifier provides it, and in a pattern and/ or at an angle which provides "gain" (over a different antenna design) where you want/ need it.
It appears to me you're renaming gain so gain isn't gain but another type of gain showing gain which is a gain different from the gain we want to see as gain at the other end.
And it appears to me you have no idea about what it is you think you understand. You obviously do not understand the term "absolute gain". There is relative gain which compares two things and there is absolute gain which is the gain of a single item and neither term has anything to do with your silly "It appears to me you're renaming gain so gain isn't gain but another type of gain showing gain which is a gain different from the gain we want to see as gain at the other end." statement.
http://www.atis.org/glossary/definition.aspx?id=10
Nowhere did I say anything about an antenna producing RF and have no idea where you even got that notion or why you would even mention that. What I DID say was that the radiation pattern and thus the take off angle can be different between two antennas and yet not exhibit a great difference in gain. In case you missed it read it above again. And again and even again if you have to.
Here is an example of what I am talking about. I had a 1/4 wave 2m antenna on my truck and it worked very well for local repeater use and when working some of the 2m FM satellites. I travel thru a long narrow valley and thought I would try a 7/8 wave antenna, the Diamond SG-7500,which has an absolute gain of 5.5 dB on 2m and 7.5 dB gain on 440MHz. This means it had about 3.4 dB gain RELATIVE to the 1/4 wave. It worked great as long as I was out of the valley and working repeaters or simplex a long distance away but it actually performed worse than my 1/4 when in close to the base of the mountain where the repeater was located and it really sucked when working the satellites except when they were low on the horizon.Did this antenna somehow magically vary it's gain? Of course not. It had a much lower angle of radiation and only a few dB more gain than the 1/4 wave. The problem was the antenna had much deeper nulls in the high angle radiation that the 1/4 wave did not have. When measured at the angle of maximum radiation, where all antennas are measured at, it did however exhibit gain over the 1/4 wave yet would perform worse in many cases hence my statement about not worrying about the gain you have but worry more about where the nulls are in the pattern.
Trust me man, I have more experience in antenna patterns, both azimuth and elevation angles, than you realize. I cut my teeth tuning and phasing AM broadcast arrays as well as multi-bay FM stacks.
Excellent! I wasn't certain you understood.
Thank you for making my point, and No, I'm not going to enter into a pissing contest with you.
Perhaps in a year or two you'll realize that you absolutely echoed the point of my prior posts.
73
From your attitude and post it appears that you will NEVER understand what I said because it in NO WAY echos your point . I'm not looking for a pissing match either but when someone makes posts in an attempt to make me look like an idiot,such as claiming I said antennas create RF, or when they make absurd posts in mockery of something THEY don't understand, then I will attempt to educate and if that fails then I shall ignore them as a lost cause. Since you have NOT been educated in this matter I shall ignore you in this matter UNLESS you make further posts trying to make it look like it is I who does not understand what it is I am talking about.
Uhm, wow?Okay. It's a little while since I have had this antenna up. It has seen some good storms. But yesterday took the cake. We had what many call a microburst or several of them actually and some heavy rain and a lot of lightning. Lost a large tree limb. Pretty much the whole neigborhood basically got it pretty good.
At any rate I am happy to say my Sirio vector is still standing straight and is performing same as usual. I have truly been impressed with the beating this antenna has taken thinking many times "it's coming down I know it LOL"! But it has done well. The only mods I did was too add some HD hear shrink at every joint from the top whip to the bottom mast pipe. I did double up all of my paracord and Dacron rope and also added several more guy ropes. Was it worth the effort. IMO, heck yes it was. Only the top 5-6ft of the mast is not supported by any guy ropes. This has worked well for me so far. I also have 2 ratchet straps, one a 1" and the other an HD 10k rated one, a 2". They hold the antenna to the chimney, then I have an L bracket at the base as well that holds the mast pipes. Yes I have 2 mast pipes going up to about 15ft or so. Just added security. Also mast pipes are bolted to house and dug into ground about 3-4ft. No concrete was used at the bottom. Just diug out the area and dropped the pipe in. It's supported in so many places the entire chimney would have to fly off LOL. At any rate, the antenna has done a hell of a job handling some bad winds. 40+ mph sustained for a while. Here is a pic of it now. It's still raining and a little breeze at the moment. Please don't laugh at my guy ropes. They work and do what they are supposed to. I get by with what I have laying around as well. But anyways here are some pics as of this morning 8:45am.
Again it's no work of art, but it works. No failure of any ropes yet. Anyways, to those that say this antenna is fragile, I don't know about all that. It's been through some bad stuff here around my area. Daytona Bch., FL. It's not even summer yet! And it's 91 for daytime highs and almost 100% humidity!!
Anyways. Just some real experience with the new Sirio Vector 4000, and the mods I performed which was to add some HD heat shrink to every single pipe joint including the whip. And I used no-ox over the entire antenna. A very light coat. Nothing special, but it works!!! Have a good day.