1m dish vs 1.2

[Mobley3]

Re: 1m dish vs 1.2

No matter what LNB you use on a dish you can ask any expert there is no substitute for a bigger dish so the argument that using the black Ultra on a 1m dish will give your 1m SNR of a 1.2m is bollox a 1.2m will outperform a 1m dish anyday of the week.

As for the noise figures take that with a pinch of salt to get anywhere near the quoted levels that the Black Ultra has @0.2db you would have to supercool it which is impossible, i am sure most people on here especially from the UK and other coldish country's that signal gets better in winter times than hot summers days due to the fact that your LNB and cable are less prone to atmospheric noise which results in a slightly better SNR in the evenings than what it does in the daytime.

I completely agree with you M8. This is certainly one area where the saying Size Matters is very true. I think some people probably get confused because of the need for finer adjustment of the dish whereas you can just slap on a better Lnb and immediately see the difference.
regards Mobley

[microchick]

Re: 1m dish vs 1.2

In the sub-continent they use large size dishes to get C band from Asian satellites and ku band from European satellites. For C band theres not much difference between a 6 foot and 8 foot dish, the signal quality goes up from 80% to 85%. For ku band an eaxtra 2 feet make a big difference differnce and the signal goes up from 60% to 80%.

[sataday]

Re: 1m dish vs 1.2

Another point when compairing dish sizes is how the manufactures measures them.
I have a 1m orbital dish that measures 1000mm x 950mm.
A triax 1.1m dish measures 1050mm x1000mm which isn't 0.1m bigger that the Orbital.

[bokkie]

Re: 1m dish vs 1.2

Yes. My iss 80 is actually 70cm. It can be very misleading, especially to newbies.
I think however that if you want to go bigger than 1 metre, maybe 1.5 metre is better than 1.2. That would make a big improvement on the weaker signals.

[microchick]

Re: 1m dish vs 1.2

Yes, I wonder what is the criteria for measuring the dish. Dish sizes are always smaller that as they are sold for. I am not a Mathematician so dont know alot about measurements but whenever I look at the dish i.e, 1 m or 90cm, they really dont look it.

[toby69]

Re: 1m dish vs 1.2

dont think you need much bigger than 1.2 dish, as most satellites show simalar chns across the board, i looked into a gibertina 1.5 very expensive some time ago, to receive amos4, 4west, (football showing). i suppose it depends on what you want to view.

[bokkie]

Re: 1m dish vs 1.2

I think they just make up the rules as they go along regarding dish sizes.
There don't see to be any trade laws governing dish sizes, so they just round it up I guess.

[digicon]

Re: 1m dish vs 1.2

I have installed Loads of Triax 1.1m's and although i am not saying yours is different in anyway sataday, but when i measured the last one it was 1100mm high by 1050mm wide thats why its classed as a 1.1 its over a 1m but just under a true 1.1m

Not sure if Toby69's 1.2m is a channel master if it is then its the same dimensions as my Gibertini 1.2m which again is classed a 1.25 due to the fact that its 1225mm wide by 1300mm high so the question should this be classed as a 1.3m perhaps probably not due to the fact that all offset dishes are taller than they are wider apart from the obvious Sky Zone 1&2 which are wider than they are taller.

[microchick]

Re: 1m dish vs 1.2

My new (old) Triax 90cm measures
9100mm high
8700mm wide
I don't know what it would call because I didn't buy it but found it. I call it 90cm.

[bokkie]

Re: 1m dish vs 1.2

My new (old) Triax 90cm measures
9100mm high
8700mm wide
I don't know what it would call because I didn't buy it but found it. I call it 90cm.

That sounds like a td88 micro, which are.very good dishes by the way.
As you found it, what condition is it in??
Any dings and dents

[bokkie]

Re: 1m dish vs 1.2

A round dish can only receive signal from one satellite at a time.
An oval, or offset dish can receive from more than 1 satellite at a time
I think the oval shape lends itself better to multi lnb setup.

[Triad]

Re: 1m dish vs 1.2

dont think you need much bigger than 1.2 dish, as most satellites show simalar chns across the board, i looked into a gibertina 1.5 very expensive some time ago, to receive amos4, 4west, (football showing). i suppose it depends on what you want to view.

Can someone of you say is there possibility to find Gilbertini 150 cm and is it possible to install it as well as sustain over the time period on roof of the building!?? Those radius antennas are mostly used in the back yard or somewhere along the house!

Wonder what's the shipping fee on one of those from Ebay??!

[bokkie]

Re: 1m dish vs 1.2

Can someone of you say is there possibility to find Gilbertini 150 cm and is it possible to install it as well as sustain over the time period on roof of the building!?? Those radius antennas are mostly used in the back yard or somewhere along the house!

Wonder what's the shipping fee on one of those from Ebay??!

Bit large for a roof I reckon, depending on where it is sited.
On my I roof that size dish, I might make an impromptu version of the wizard of oz.

[Mobley3]

Re: 1m dish vs 1.2

I think the difference that arises in dish sizes is that if you measure straight across from one lip to the other you get one size whereas if you measure the surface of the dish ie.
measure the parabola you will come up with a different result.
Regards Mobley

[McrRed]

Re: 1m dish vs 1.2

No matter what LNB you use on a dish you can ask any expert there is no substitute for a bigger dish so the argument that using the black Ultra on a 1m dish will give your 1m SNR of a 1.2m is bollox a 1.2m will outperform a 1m dish anyday of the week.

That wasn't my argument.
What I was saying is what you eloquently repeated...that noise levels quoted for lnb's don't really mean anything.


The size comment was because someone said they didn't have the option to increase dish size because of planning permissions or something. If that is the constraint then perhaps a better lnb can help. If that's not the case then I stand corrected.