whats the best lnb setup on a gibertini 1.05m dish

[Archive-8]

Thanks Steve, I will do the same pal if I can find them, maybe in the greenhouse lol.

It was the very slim titanium I was hoping preformed well, it would be easy with an lnb like this to get C band lnbs tight to the spot but I guess whatever performs best has the KU spot

http://www.ebay.co.uk/itm/Smart-Tit...old-Version-/191020800682?hash=item2c79ba1aaa

Is that the same company that makes the C-Band lnb's?

 

[Archived-1]

Is that the same company that makes the C-Band lnb's?

I am unsure tbh Chris, it was just the shape of it for moulding C band lnd scalars around it that caught my eye pal.

 

[gibertini]

@martin-f i have 4 old mk-1 smart titanium lnb,s here so if you want one for your tests give me a shout

 

[Archived-1]

@martin-f i have 4 old mk-1 smart titanium lnb,s here so if you want one for your tests give me a shout

Many thanks gib, I think Steve OP has one to try and he is only a few miles away from me, but many thanks for you offer very much appreciated

 

[nelson_b]

but the best KU lnb will have to take the main spot whatever it is i am willing to do extensive tests to find what suites my setup best.

Yes - i will follow your tests with interest - even when you find one which seems initially good.
it may not be, across all the frequencies. ... it could take some time

must admit i,m a little lost over what is best for me recently, on the 1.8cm .
if i end up fitting a standard l.n.b.f (and its looking that way) it will sit further back in relation to the C band feeds than the C120 + c.m. feed does... so the C band conical feeds may block some of the signal to the k/u l.n.b.f.

 

[Archive-8]

Just swapped my invacom 0.3 c-120 and matched feed horn to my twin rt bu,

47.5e 11654 Aghani

Inv 55% s 65%q
Rt 80% s 70%q

31.5e 11935 pro TV

Inv 91%s 51%q
Rt 97%s 63%q

0.9W 11552 nonrk

Inv 79%s 89%q
Rt 92%s 95%q

7.2w 11296 rotana

Inv 90%s 65%q
Rt 96%s 68%q

 

[Archived-1]

Interesting Chris that's two bad reports, it looks like 4G is a problem for the newer lnb to be fitted with 4G isolators, I wonder how many of us suffer with it ?, is there anyway to monitor the 4G around us I wonder ?.
Greater immunity against 4G interferences

 

[Archive-8]

I had to buy one of these rt 4g screened lnb to try.

http://pages.ebay.com/link/?nav=item.view&alt=web&id=251726784893&globalID=EBAY-GB

£8.95 free p&p

 

[Archived-1]

Mine was despatched a few hours after placing the order Chris, even though I did not pay for fast delivery it might be here for Monday, I will post up its results.

 

[Archived-1]

even though I did not pay for fast delivery it might be here for Monday, I will post up its results

Hi its just arrived, I will try and find time to play later on today, the neck is very short I prefer longer necks, but I cant knock it until ive tried it .

 

[gibertini]

if 4G is going to be a problem i can expect a s***storm of RF interference as i have 10 mobile phone masts within 1 kilometer of my house. dont understand how it works as i thought mobile phones run on 900mhz/1800mhz and UHF ch60 to 69 was 780mhz to 860mhz. so whats happening then? are they extending the GSM 900MHZ band right down to 780MHZ then to accomodate 4G.

 

[hvdh]

Hmm, what 4G frequencies are supposed to cause interference in Ku-band, and how?
Smells like a new nonsense sales-booster like HD ready, 3D ready, UHD ready.
I know of WiMax trouble into C-band, but Ku-band???

 

[Archive-8]

Just been googling this and it seems in the UK, has been doing some sort of tests, on channels 51-60. And the tests are to try and open up the DTT service to cover 470MHz to 862MHz.

This is the pdf I was reading

https://www.dropbox.com/s/wotf0mxgop887pv/ite-800-mhz.pdf?dl=0

 

[digi247]

there are actually 3 4G frequency bands in use currently 800MHZ - 1.6GHZ - 2.6GHZ, i knew about the 1.6 first as this is what EE started on and still maintain as well as using the 800,1.6 and 2.6 the other networks apart from o2 use a combination of the other 3.

So i suppose the question is what band does the LNB so called reject unwanted 4G interference

 

[Archive-8]

Well put mine on today and first impression is that it cuts the signal levels down. :-( I have lost quite a few weak transponders. Looks like I will have to put the black ultra back on.

 

[digi247]

OH! crikey that bad eh!, similar to when i tried the Primesat Platinum the other day nothing comes close yet to the Black Ultra

 

[hvdh]

there are actually 3 4G frequency bands in use currently 800MHZ - 1.6GHZ - 2.6GHZ, i knew about the 1.6 first as this is what EE started on and still maintain as well as using the 800,1.6 and 2.6 the other networks apart from o2 use a combination of the other 3.

So i suppose the question is what band does the LNB so called reject unwanted 4G interference

These are indeed the known mobile bands, some of which fall in the 950...2150 MHz satellite IF range.
Interference depending on using well shielded cable, connectors properly fit etc.

Maybe these "4G" LNB's simply have a higher than usual IF output level?
Or a choke/ferrite inside, to suppress mantle currents entering at the LNB output?

I expect Chris1979 soon to open the thingy, in the name of science. ;)

 

[Archive-8]

These are indeed the known mobile bands, some of which fall in the 950...2150 MHz satellite IF range.
Interference depending on using well shielded cable, connectors properly fit etc.

Maybe these "4G" LNB's simply have a higher than usual IF output level?
Or a choke/ferrite inside, to suppress mantle currents entering at the LNB output?

I expect Chris1979 soon to open the thingy, in the name of science. ;)

I doubt if I will open it up.

 

[Archive-8]

I will scan a few sats on the PC Card first, then swap them over to try it out again.

 

[Archive-8]

Just scanned 47.5E, 31.5E, 0.9W, 7.0W, 30W with my black ultra twin and the new 4G RT lnb, on my gibertini op125 and Tbs 6983 satcard.



Or as an excel document

https://www.dropbox.com/s/2t78obqk6clq5bj/lnb.xls?dl=0