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Old May 20th, 2011, 06:09 PM   #5881
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Old May 20th, 2011, 09:23 PM   #5882
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Quote:
Originally Posted by El Doctore View Post
Bro, you have absolutely no clue of what you're talking about. And if you don't believe the proven health hazard, just use the WWW for enlightenment.

Here, let me help you with a link from one of the main companies which provides the antennas for the tower:

http://www.hitachi-cable.com/about/c...ile/index.html

And a quote:
That's omnidirectional systems "engineer". The antennas themselves are spotbeams, meaning each element only covers a small area. The omni directional reference only means that the whole system has omnidirectional coverage. Not each antenna.
And neither me or anybody else can help someone who believes nonsense because he saw it on the WWW. I imagine you're terrified of Backscatter scanners too.
And I ain't your bro.
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Old May 21st, 2011, 01:03 PM   #5883
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I took the photograph in the same place last August.

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Old May 21st, 2011, 02:49 PM   #5884
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And I ain't your bro.
Thanks God for that!



Are they going to take out the crane arms with a chopper or are they going to disassemble those too?
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Old May 21st, 2011, 03:21 PM   #5885
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If Tokyo ever gets the Olympics that will make a great place for a big @$$ torch. Possible? Probably not. But it would look cool.
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Old May 21st, 2011, 04:01 PM   #5886
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The last big crane gets lowered by a smaller crane that can be disassembled and taken down in the elevator. There might be an intermediate crane in there. I'm not sure at that height and crane size.
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Old May 21st, 2011, 11:06 PM   #5887
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If you look at the tower it should be obvious that a helicopter can't be used to take the cranes down. It's not safe to fly the helicopter so close to the tower, especially when it's lifting heavy loads.

The construction company has released more info and details on how they are going lower all the cranes.
http://www.obayashi.co.jp/news/skytreedetail16_20110516

The biggest problem is that a smaller crane has to lower the last tower crane down, that has never been done in Japan from this kind of height (400m from the 1st observation pod). The small cranes that are usually used simply cannot lower the biggest parts of the tower crane from such height, they have to do something different. The solution for this problem is to use not 1 small crane but 3 cranes. Each crane will be a bit smaller, the 1st smaller crane will lift down the last tower crane, the 2nd will lift down the 1st smaller crane. And the last small crane, that can be transported down with the elevator will lift down the 2nd smaller crane. Confused? The pictures in the link above should be clear enough even if you don't read Japanese.

1 picture from the site with the details for all the cranes that are going to be used (TC1 is the last tower crane)

[IMG]http://i55.************/rbl4q1.jpg[/IMG]


This somehow explains why the whole process will be finished as late as July.
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Old May 22nd, 2011, 05:09 AM   #5888
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Anyway,





Seems like we are on the another planet
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Old May 22nd, 2011, 11:26 PM   #5889
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Weekend blog update










http://moestructure.cocolog-nifty.com/blog/




http://blogs.yahoo.co.jp/masatoshi0102


Lego and Tokyo Sky Tree Build the Future CITY! event, with a Lego Sky Tree.










http://ameblo.jp/kiyurino-jp/
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Old May 23rd, 2011, 07:00 AM   #5890
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5/21





Cranes starting to be taken down!







http://tokyo-sky-tree.seesaa.net/
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Old May 23rd, 2011, 07:37 AM   #5891
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05/23 Tower crane descend time laps video:

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Old May 23rd, 2011, 08:08 AM   #5892
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Hey in the video they're taking off the nets . That's great.
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Old May 23rd, 2011, 09:27 AM   #5893
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Quote:
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05/23 Tower crane descend time laps video:

It's damn impressive!!!
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Old May 23rd, 2011, 10:29 AM   #5894
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Quote:
Originally Posted by Nomadd22 View Post
They're not omni directional. In fact they're extremely directional since they're transitioning to centralized spot beam type systems instead of hundreds of little towers, and nobody on the planet calls 10 watts "high power".
In language a phony engineer can understand, that means you'll never see the signal from more than 1/2 dozen of those transmitters at any one spot.
And the cancer link only exists in the imaginations of people who flunked toll taker school and wear tin foil hats. Sort of like people who ignore the fact that a phone putting out 100mw 2 inches from your brain is ludicrously higher rf signal strength than a tower full of antennas a few hundred feet away.
My sentiments exactly

If it were Analogue transmission with huge base power being fed through that array,and a resulting field strength contour (gain) that would have the Prime Minister of Thailand Abhisit Vejjajiva being able to receive Radio Tokyo FM on his pocket radio.Then.There would be immediate concern for the welfare of those living within close proximity of said Sky Tree Tower.

This is not the case.It's Digital.It's low strength.

Quote:
Digital Terrestrial Broadcasting and the Role of the New Tower

In July 2011, the current analog broadcasting will end and a complete transition made to digital broadcasting.

Five commercial stations and NHK took this as a turning point to advance preparations towards digital broadcasting from a TV tower with a height of around 600m and decided on the Sumida/Taito area as the site for construction of the tower.
Digital Broadcasting Experts Group
Re: Tokyo/Nagoya/Osaka Digital transmitting facility overview
www.dibeg.org/overview/pamphlet_e_Ver11.pdf

Heap of standards found here: http://www.arib.or.jp/english/html/overview/sb_ej.html

Last edited by GoluBoy; May 23rd, 2011 at 10:37 AM.
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Old May 23rd, 2011, 01:12 PM   #5895
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Those aerial shots are unbelievable! :o
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Old May 23rd, 2011, 02:15 PM   #5896
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Quote:
Originally Posted by GoluBoy View Post
My sentiments exactly

If it were Analogue transmission with huge base power being fed through that array,and a resulting field strength contour (gain) that would have the Prime Minister of Thailand Abhisit Vejjajiva being able to receive Radio Tokyo FM on his pocket radio.Then.There would be immediate concern for the welfare of those living within close proximity of said Sky Tree Tower.

This is not the case.It's Digital.It's low strength.
Oh dear. You posted those links but you didn't bother to read them.

Digital signal can be lower than analog only on short distances. In order the signal to cover ~2000 km^2 the signal strength needs to be increased exponentially in order the people on the edge to have the same quality as the ones in center. Is similar to WiFi transmitters. The further you go from the source, the lower the available bandwidth will be. The thing is the bandwidth needs to be at some specific nr., even at the edge of the city otherwise you'll get sound or video artefacts, lost of services, etc, etc.

Read some more please.
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Old May 23rd, 2011, 02:39 PM   #5897
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Nice project !
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Old May 23rd, 2011, 03:26 PM   #5898
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Quote:
Originally Posted by El Doctore View Post
Oh dear. You posted those links but you didn't bother to read them.

Digital signal can be lower than analog only on short distances. In order the signal to cover ~2000 km^2 the signal strength needs to be increased exponentially in order the people on the edge to have the same quality as the ones in center. Is similar to WiFi transmitters. The further you go from the source, the lower the available bandwidth will be. The thing is the bandwidth needs to be at some specific nr., even at the edge of the city otherwise you'll get sound or video artefacts, lost of services, etc, etc.

Read some more please.
Please stop posting. You don't even know the difference between bandwidth and signal strength. It comes from pretending to be an expert because you read something on the back of a Captain Crunch cereal box. The fact that you claimed that all the antennas were omnidirectional shows the depth of your ignorance. Each antenna element covers a very small patch, meaning they can reuse the same frequency carrier up to 90 times.
There's a 60db range between the highest signal a user will ever see and the lowest signal you need for full bandwidth. That translates to a 1000 to 1 difference in distance for line of site.
The main purpose of most of these antennas is not broadcast. It's two way data comms. (Data includes all voice comms now days). That means hundreds of very low power carriers. It doesn't do any good to transmit high power on one end when the other end can only send 1/10 of a watt back.
And digital broadcast radios are much lower output than the old analog, since the highest power analog stations were much lower frequency and less numerous, both of which means more power per transmitter.
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Old May 23rd, 2011, 06:34 PM   #5899
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05/23 blog round-up










http://blogs.yahoo.co.jp/masatoshi0102




http://a-nobusan.cocolog-nifty.com/blog/
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Old May 24th, 2011, 08:32 AM   #5900
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I'm afraid we will get to see daily time-lapse video's of the cranes.

05/24



Even when it rains.

[IMG]http://i53.************/2l903sg.jpg[/IMG]
http://tokyo-sky-tree.seesaa.net/
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