120cm Gregorian

**lloyd21** · 11-06-2005

Coming from you Likvid thats means alot, 300 for just the az/el?!?

If it would last you 10+ years it may be worth it...

Have you seen one of these perform?

**lloyd21** · 11-06-2005

WOW, that thing is outrageous....the arms on it look robotic!!! Not only that he has two cas120 AND cas90!!!, Cannot tell by the pictures does it come with a polariser(seavey quality)??? Also do you know what LNB it is running.

Likvid · 11-06-2005

No i haven't, i think they are too expensive for people to buy, i mean you can get the Gibertini 125cm for about 130 euro today including AZ/EL mount.

Originally Posted by lloyd21

Have you seen one of these perform?

Likvid · 11-06-2005

The feed is matched to the reflector, the LNB i don't know about, it's Kathrein specific.

If i bought the antenna i would have stripped the feed from the LNB and put a SMW or Invacom there instead.

The feed is everything, i think the performance would degrade if you put something like a Invacom with integrated feed on that reflector, they are usually made only for 0.6 f/d reflectors.

Just look at the Gibertini, it got 0.66 f/d, a budget Invacom LNB with feed would not perform as good as a optimized feed for it.

You can buy a optimized feed from Seavey but it will cost you around $300 or something last time i checked.

Originally Posted by lloyd21

WOW, that thing is outrageous....the arms on it look robotic!!! Not only that he has two, Cannot tell by the pictures does it come with a polariser(seavey quality)??? Also do you know what LNB it is running.

Likvid · 11-06-2005

Yes i know, it's German quality, you get what you pay for like i said.

Originally Posted by lloyd21

WOW, that thing is outrageous....the arms on it look robotic!!!

**lloyd21** · 11-06-2005

Would it be worth it then??? Even as high as quality as it is there are still the physical limitations of a 120 no??? over say a 125 of decent build quality???

The Fibo gregorian "theory" corrects this with a dual reflector.

**lloyd21** · 11-06-2005

I think you said it before, the market is so flooded with cheap stuff it's crazy, When I do buy...pretty much anything, I always get the best I can afford, or will just save up then buy it. I have acutally *SAVED* money using this method.

When I buy it or something similar, it would be outfitted with equal quality LNB/Polariser/Feed.

Likvid · 11-06-2005

The only REAL advantage of a gregorian dish is that it got much better cross-polarization than a normal dish.

The subreflector phase out the opposite polarization and is mostly used for uplinks.

There are tests done that shows this remarkable improvement on phasing out the opposite polarization due to the subreflector.

Tests also shows that a gregorian dish performs about 10% better than a normal offset dish at the same size.

If i had the space and couldn't get larger dish than 120cm and didn't mind spending what the Kathrein cost, i would buy it.

The Fibo 120cm is so hard to get so you can look forever.

If you appreciate quality you should buy the Kathrein.

Originally Posted by lloyd21

Would it be worth it then??? Even as high as quality as it is there are still the physical limitations of a 120 no??? over say a 125 of decent build quality???

The Fibo gregorian "theory" corrects this with a dual reflector.

Likvid · 11-06-2005

Yeah that's what i think also, i always buy the most expensive stuff i can afford, i hate cheap quality, people like buying CHEAP these days, it's the fashion word of modern times, the cheaper the better people thinks.

Quality costs, and will always do.

Mostly to blame for this are all Korean satellite manufacturers flooding the market with cheap stuff.

You want a good retailer for the Kathrein in Germany?

Try this!

https://shop.mascom.de/index.php?sid...e3a20b91398e0b

Originally Posted by lloyd21

I think you said it before, the market is so flooded with cheap stuff it's crazy, When I do buy...pretty much anything, I always get the best I can afford, or will just save up then buy it. I have acutally *SAVED* money using this method.

When I buy it or something similar, it would be outfitted with equal quality LNB/Polariser/Feed.

**lloyd21** · 11-06-2005

I do appreciate quality like most people on this board...but not at any cost.

The Andrew Type 120 cost 1/4 and is marginally *worse*

Thanks for the information about the gregorian. thats pretty interesting.

Likvid · 11-06-2005

Read this technical document about gregorian reflectors.

http://www.andrew.com/search/docviewer.aspx?docid=6829

Originally Posted by lloyd21

I do appreciate quality like most people on this board...but not at any cost.

The Andrew Type 120 cost 1/4 and is marginally *worse*

Thanks for the information about the gregorian. thats pretty interesting.

**lloyd21** · 11-06-2005

A Cas90 = 200Euro
A Cas120 = ~400Euro

Lets just say hypothetically you mulled it over and decided to buy one.
How would two coupled Cas90's perform over a single 120

I agree with the whole Korean Cheap summery...too bad the Mrs. is all about quantity over quality. Im the exact opposite.

Here is a conversation we had just recently about some knives
Mrs lloyd21...Look that a good price on a 30pc knive set
me...no its not its garbage
Mrs. lloyd21....but you get 30pc's
me....their garbage....let just spend the money and get the Wustof
Mrs. lloyd21....the price is like X10 *Yada* (Japanese girls word for No Way)
me....you'll be buying new ones next year

I think you get the picture

**lloyd21** · 11-06-2005

So Andrews makes gregorian....im really interested

Likvid · 11-06-2005

Hehehe.....

What country are you from? Japan?

I can't comment about coupling two CAS90s together as it is nearly impossible and if it worked it would be like 1.8 meter, more like 1,20 meter or something.

Likvid · 11-06-2005

Andrew bought Channel Master in 2003, Channel Master couldn't face their financial problems so Andrew took over all production, it's really a Channel Master design from the beginning.

The dual-optics or gregorian dishes they offer today are only available in sizes of 1.8m and 2.4m in their VSAT range that was branded Channel Master before.

Why don't you install the dish as this guy have done, then you can have a 2.4 meter dish outside your balcony.

Originally Posted by lloyd21

So Andrews makes gregorian....im really interested

**lloyd21** · 11-06-2005

Yes Im in Japan

Only 1.8m and above...Likvid your like my pastor the bearer of good and bad news

Not that I would know how or even do a good job.....how would one Make a gregorian

Here is one of you old posts
rolfw commented it was homemade

http://www.sat4all.com/upload//72536...anzijkant1.JPG

Likvid · 11-06-2005

Yes it's homemade.

**lloyd21** · 11-06-2005

Why don't you install the dish as this guy have done, then you can have a 2.4 meter dish outside your balcony.

My wife would really say YADA

**lloyd21** · 11-06-2005

How would one pull that off???
Even better question is it even effective?

Likvid · 11-06-2005

Here you can see the mount of my dish with the Jaeger SMR-99G.

The back view picture is when the dish is pointed to Hispasat.

**lloyd21** · 11-06-2005

Nice....is you dish fully exposed, it looks like its behind the balcony wall a tad no?

Likvid · 11-06-2005

Yes it's inside the balcony on a floorstand.

The balcony wall is no problem as the dish angle pass the wall.

I have not installed the polarizer yet as i am waiting for delivery from Germany.

Here you can see two more pictures, the first the dish is pointed at 53 degrees East and the second picture shows the ground mount on the balcony.

The 36v motor cable clamped between the door and floor is only temporary, i will install next week when the new polarizer arrives a full shielded 7-core cable nicely.

Originally Posted by lloyd21

Nice....is you dish fully exposed, it looks like its behind the balcony wall a tad no?

**lloyd21** · 11-06-2005

Very nice equipment...well done. I was under the impression you were running a seavey polariser with that SMW.

A question about your SMW lnb....how do these compare to the likes of a Norsat Pll's, I have searched far and wide for Lab test but cannot find them. I have always heard that SMW and Norsat were the among the best, is this actually true?

Also are pll's really necessary or is just smoke and mirrors, I read conflicting information on these forums and other....Old Satellite says they are great, Others say unnecessary.

Likvid · 11-06-2005

Seavey was too much losses in the waveguide, i am changing that for a Chaparral that i know works good.

Next week i have the SMW + Chaparral, will post picture then.

I have no experience with Norsat, but they don't handle the whole frequency range of 10.7-12.75GHz.

My SMW is not PLL, it's DRO.

PLL LNBs are really only usefull for data broadcasts where you need pin-point accuracy of the signal.

PLL LNBs are hyped for satellite-TV, not for DATA!

SMW are the best, they are handmade to custom order.

My SMW LNB is custom ordered with LO +-1MHz which is really great for a DRO LNB, PLL LNBs can go down to +-250kHz i beleive.....

Likvid · 11-06-2005

Here is my play room with all stuff.

You can see my server there and the 50" plasma and all.....

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120cm Gregorian Information exchange on LNBs, Single satellite, motorised and multi-satellite systems. DiSEqC switches, positioners, motors, actuators, dish-alignment etc.

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