| Author |
Message |
    
mikefromms
| | Posted on Monday, July 21, 2003 - 10:55 pm: | 
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Anyone know the true gain of the AP? It claims around 4 dbd gain. Sounds a little high to me. It is a good performer.
mikefromms |
Tech833
| | Posted on Tuesday, July 22, 2003 - 12:50 am: |
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I think I covered that once... |
mikefromms
| | Posted on Tuesday, July 22, 2003 - 11:07 am: |
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Just stirring conversation.
mikefromms |
Kc0gxz
| | Posted on Tuesday, July 22, 2003 - 1:52 pm: |
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Tech833
You've covered the subject of gain MORE than "once before".
mikefromms
Like all of the others, TRUE gain is on a omni is a little less than 1 Db.
Watch them go ballistic now.
Jeff, Kc0gxz.
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Bigbob
| | Posted on Tuesday, July 22, 2003 - 7:53 pm: |
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Yeeeehawww!!,lol. |
Kc0gxz
| | Posted on Wednesday, July 23, 2003 - 12:51 am: |
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Bigbob
Put the Que stick down and get off the bar Bigbob.
Jeff, kc0gxz. |
Kirk
| | Posted on Wednesday, July 23, 2003 - 7:21 pm: |
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and usually measured in dbi (verticals)....the old "theoretical" thannng--- |
Bullet
| | Posted on Thursday, July 24, 2003 - 4:58 am: |
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1/4 wave in free space forming a perfect circle of radiation.
db is relitive to what your comparing it to.
i can say my 6 element has 14.57 db and you would have a hard time disproving it untill i said dbd or dbi.
it may have 100 db compared to the empty pop can on the ground.....know what i mean?
thats why i like dbd gain its not fantasy gain or theoretical, its what this one will do over that one. something solid to form from.
just my opinion |
wildbill
| | Posted on Friday, July 25, 2003 - 5:54 pm: |
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gain doesn,t mean a whole lot. all gain is saying is that your antenna is better than a coat hanger, or a beer can etc. i should hope to shout. for instance i dont know nor care what the gain is on my imax but i do know that it got out. isn't that what its all about. |
Kc0gxz
| | Posted on Friday, July 25, 2003 - 9:34 pm: |
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wildbill
You are so right. That's exactly what it's all about.
Jeff, kc0gxz. |
Bigbob
| | Posted on Friday, July 25, 2003 - 11:20 pm: |
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I guess it boils down to "mine is better than yours",oneupmanship,that's all.If you get out better with brand x than brand a then brand x is better for your application,'nuff said. |
bruce
| | Posted on Saturday, July 26, 2003 - 8:45 am: |
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Bullet
Back in the 70's a small antenna company was making 2 meter antennas. They ran a add which the banner read
186 DB GAIN!*
Thats right our new 2 meter antenna has the highest gain even for its class on 2 meters!
* Gain measured using our antenna at 100 foot at 20 miles over a dummy load mounted down a 1000 foot well.
It was ment to be funny and was but looking at JOGUNN and others there not far from that. Oh and as for DBD ver DBI ... 0 DBD = 2.3 DBI so your 14 DB gain ant would have either 14 DBI or 12.7 DBD
Again your right gain dont meen much the way the companys play with it
appox gain is = to
41253/horz beamwidth in deg * vert beam width in deg
so a vert with 365 deg of hoz coverage and a 11 deg vert lobe has about 10 dbi of gain!
it should give a good idea of what you realy need to have! |
mikefromms
| | Posted on Wednesday, July 30, 2003 - 9:29 am: |
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So, what is the gain of the Astroplane? Is it 0.9, 0.8, 0.7? Is it possible is might be 1.5 dbd?
mikefromms |
bruce
| | Posted on Wednesday, July 30, 2003 - 11:25 pm: |
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Ill give it a 1.5! realy the gain is in that range .....THE AP is a good all around omni and as for gain you cant measure the change between .9 and 1.5 on most radios anyway.
bruce |
Bullet
| | Posted on Thursday, July 31, 2003 - 4:13 am: |
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bruce,
rodger that.
186db gain, lol
id like to have that on my tower!
imagine the EIRP of that puppy..wah hoo! |
bruce
| | Posted on Thursday, July 31, 2003 - 8:22 am: |
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Bullet and dont forget the astroplane may also have AUDDDDDDIO gain LOL |
mikefromms
| | Posted on Thursday, July 31, 2003 - 5:35 pm: |
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It sure performed yesteday= NJ., Ct., NY., PA., and I talked to a guy almost 50 miles away last night using only the tuned up Lincoln.
mikefromms |
RCI 2990
| | Posted on Friday, August 01, 2003 - 1:35 pm: |
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You guys go ahead and knock on the astroplane all you want, I dont care. But back in the mid 1970s that antenna and the Sder were the most popular antennas in my area and are still very highly regarded. They work just as good ans any other antenna if put up right at the right height and use the right coax... |
bruce
| | Posted on Friday, August 01, 2003 - 2:48 pm: |
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RCI I LIKE THE AP and find they work well i was poking fun at everyone nit picking at gain |
Bullet
| | Posted on Saturday, August 02, 2003 - 1:40 am: |
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ya just having a lite harted poke at the gain issue.
i used a starduster as well in the 80's and was fond of it then. |
mikefromms
| | Posted on Saturday, August 02, 2003 - 7:26 pm: |
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I really liked the original starduster. That thing really smoked.
mikefromms |
bruce
| | Posted on Saturday, August 02, 2003 - 10:22 pm: |
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bullet.....
As you know gain is a relative issue and if you want to sell more and make the buyer think he is getting something it becomes very relative. JOGUNN figured this out 20 years ago if your going to lie, lie BIG even make up gains that dont exsist .... the others dont HAVE that gain so you must be better. Now gain in the REAL word ls the compression of signal over a 360deg * 360 deg sourse ( DBI ) or a standard like a dypole ( DBD ) If you want gain you must put the lobe where the receiving station is and a 5/8 wave for example does this by compressing the vert part of the lobe down to around 70 deg ( -3db points ) if you stack 2 5/8 wave antennas and phase them this lobe would shrink to under 40 deg ..... and the signal would be TWICE as strong ( + 3DB more ) So much for tech babble now about that 186 db gain rubber ducky? do you think if i stack 2 of them i could get 189DBD ? good enough for MARS bounce ...... HUmmm a new EME ? Earth-MARS-Earth dx of the deep space kind ...... |
RCI2990
| | Posted on Sunday, August 03, 2003 - 2:18 pm: |
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I dont worry about gain that much i just put up the antenna and if it talks good i keep it!!!!!
If i can get out good and hear good on it to me its a good antenna. I know thats unorthodoxed and not professional but thats my simple antenna test i do!!! LOL!!!! |
