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SIRIO 27 tornado base antenna

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  #9  
Old 08-29-2007, 01:02 AM
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mc
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  #10  
Old 08-29-2007, 04:01 AM
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This is about antennas in general, not any one specific antenna. It is universal, applies to all antennas.

An antenna has two primary aspects the user should consider, it's mechanical characteristics and it's electrical characteristics. The mechanical characteristics determine how long it will last in the real world environment. It's electrical characteristics determine how it radiates (where the signal goes). Having very good mechanical characteristics isn't a sign of a 'perfect' antenna if it's electrical characteristics aren't also very good. The other way around too.

Forgetting about the electrical characteristics for a minute...
Probably, the determining factor (or at least one of them) of how well an antenna performs, in both aspects, is price, sort of. Making an antenna mechanically strong has a price in money and materials. Strength has penalties too, weight, and 'wind area'. Which means that all the other things necessary for a good installation have to be bigger/stronger too (as in support structure, guying, foundations, etc, etc.). None of which are for free, usually.

Now for the electrical characteristics.
It all depends on just where you want the radiated signal to go. Different types of antennas have different radiation characteristics. There is no such thing as a "perfect" universal antenna that will do everything. There are antennas that do ~almost~ everything sort of well. The bigger that "almost" thingy, the more expensive and physically 'elaborate' the antenna gets. (Another aspect is that just because it's more expensive and/or 'elaborate' does not mean it's better.)

Any/every thing has limits, usually determined by physics and your wallet. The only thing that doesn't fall under that 'limit' is advertising where anything goes. The only thing to really pay attention to when dealing with antennas is it's mechanical and electrical abilities. It's 'looks' mean nothing unless it's only being used to 'dress-up' something else. In most cases, 'looks' apply mainly to a mobile antenna, since that's about the only kind that you get close enough to to see much of (ideally).
[Having just swapped for a new(er) truck, 'looks' mean more at the moment than it will later. Give me a few months and I won't really care where I punch a hole in it, but for right now... oh well, just have to wait for the 'new' to wear off, you know?]

- 'Doc

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  #11  
Old 08-29-2007, 09:52 AM
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Quote:
Originally Posted by W5LZ
This is about antennas in general, not any one specific antenna. It is universal, applies to all antennas.

An antenna has two primary aspects the user should consider, it's mechanical characteristics and it's electrical characteristics. The mechanical characteristics determine how long it will last in the real world environment. It's electrical characteristics determine how it radiates (where the signal goes). Having very good mechanical characteristics isn't a sign of a 'perfect' antenna if it's electrical characteristics aren't also very good. The other way around too.

Forgetting about the electrical characteristics for a minute...
Probably, the determining factor (or at least one of them) of how well an antenna performs, in both aspects, is price, sort of. Making an antenna mechanically strong has a price in money and materials. Strength has penalties too, weight, and 'wind area'. Which means that all the other things necessary for a good installation have to be bigger/stronger too (as in support structure, guying, foundations, etc, etc.). None of which are for free, usually.

Now for the electrical characteristics.
It all depends on just where you want the radiated signal to go. Different types of antennas have different radiation characteristics. There is no such thing as a "perfect" universal antenna that will do everything. There are antennas that do ~almost~ everything sort of well. The bigger that "almost" thingy, the more expensive and physically 'elaborate' the antenna gets. (Another aspect is that just because it's more expensive and/or 'elaborate' does not mean it's better.)

Any/every thing has limits, usually determined by physics and your wallet. The only thing that doesn't fall under that 'limit' is advertising where anything goes. The only thing to really pay attention to when dealing with antennas is it's mechanical and electrical abilities. It's 'looks' mean nothing unless it's only being used to 'dress-up' something else. In most cases, 'looks' apply mainly to a mobile antenna, since that's about the only kind that you get close enough to to see much of (ideally).
[Having just swapped for a new(er) truck, 'looks' mean more at the moment than it will later. Give me a few months and I won't really care where I punch a hole in it, but for right now... oh well, just have to wait for the 'new' to wear off, you know?]

- 'Doc
Doc I was wondering where you were going on this post
he he and now I see.

Doc got himself a New Truck, well kinda sorta :P ya get the
idea.....

Doc don`t tell me ya got rid of the Old Ford ?
U 2 were a perfect match as I recall, seeing ya driving with
your pointed little head out the drivers door- he he he

Hope ya like like your new one...


Regards,
John
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  #12  
Old 08-29-2007, 11:11 PM
Crotchety Old Bastard
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Sqealer...uh Dealer,
No, still have the old Ford. Doubt seriously if any dealer would offer what it's worth. Not that it isn't for sale at the right price, mind you! Pointy little head? How can you tell with all the hair that's on it?
- 'Doc

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  #13  
Old 02-14-2010, 07:48 PM
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Quote:
Originally Posted by Master Chief View Post
Did I mention that the Sirio antennas are JUNK!
Are you serious about Sirio antenna's Junk? what have you been smoking? LOL

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  #14  
Old 07-26-2010, 03:40 PM
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I just got my Sirio tornado 27 today from hy electronics via ebay. When I opened the box I was surprised as to the ease of assembly. Less than 15 minutes with a tape measure, marker and phillips screwdriver. You do have to convert MM to Inches but that is easily done by googling a converter online.I used whip @ 37.5 Inches and groundplanes @ 33.5 inches. Im replacing a v5000 groundplane by maco with this. First impressions, I dont like the two screw per section assembly so Im going to notch the sections and add stainless clamps this will prevent the "banana" bending I have heard of. The Coil, SO-239 and associated hardware Is very well built and I was happy at all other aspects of construction.

Remember to use locktite on set screws!

After assembly, I screwed in my RG213 and went to testing at ten feet. I was pleasently surprised! Swr 1.2 First try. Done deal!! Tomorrow its goes up on the 80 ft tower. Pictures to follow. Compared to the Maco, It really Depends on what you want. Sirio is a high quality italian antenna. They are used by alot of both cb and amateurs across the pond. Maco has been a US staple for years so of course when another brand comes in it is met with alot of reluctance. I have been a maco and wilson guy for years but after having the wilson 5000 stolen, I switched to a sirio 4000 and havent looked back It has ears like a preamp I couldnt be happier! But in the end allow me to say. Antennas are like ladies, There is one for every person. I love to try new things and this antenna is one Im happy to say is easily worth the cash.
Z-MAN 369 likes this.

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  #15  
Old 07-26-2010, 04:00 PM
BOOTY MONSTER
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hey joe , good to get some comments from someone actually using it . since your gonna take pics could you also take pics of the edge of the tube elements next to a coin so we can get an idea of the thickness of its wall ? some up close pics of the coil , feed point and ground elements attachments would be sweet too . and thanks for you comments so far .

after you've had it up a bit be sure to let us know how it performs compared to your maco 5000 ? how does the strength/sturdiness of the antenna feel compared to the 5000 initially ?

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  #16  
Old 07-26-2010, 05:01 PM
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Default Assembly Photos 1st Batch

During assembly pics...........












More to come as I progress..... 73's kd7joe

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