Best dish for C-Band

[Pipedream]

I have a 1.8 offset channel master and a 1.8 PF channel master, which would be the best for receiving C-band? I have just put a C-band LNB on the offset but not having too much luck with it at the moment. Picked up a few TP's on some sats but not too many.

 

[Terryl]

A 1.8 meter dish is a bit small for "C" band in some locations, you can go to satbeams.com and look at some of the footprints for your location, you select a satellite in the list and click on the little green globe, this will bring up a footprint map for that bird, the "C" band transponder stuff is all in the funny colored purple box(s) at the top of the page.

Once you select a satellite and it's "C" band beam you can zoom into your location and click on where the dish is located, this will give you an estimated dish size needed for a good error free signal on that bird for your location.

 

[Captain Jack]

Can you post a few pictures of your setup?

 

[beavs2112]

I have a 1.8 offset channel master and a 1.8 PF channel master, which would be the best for receiving C-band? I have just put a C-band LNB on the offset but not having too much luck with it at the moment. Picked up a few TP's on some sats but not too many.

@Pipedream. Sorry to hear of your poor c-band results. Do you have the correct scalar feedhorn for the offset dish? If you use a c-band lnbf on an offset dish you need the offset feedhorn ring to match. SSS has them in their feedhorn section. A couple of pictures of your feedhorn setup may help us help you improve your reception. I see CJ types faster than me.

 

[RimaNTSS]

I have a 1.8 offset channel master and a 1.8 PF channel master, which would be the best for receiving C-band? I have just put a C-band LNB on the offset but not having too much luck with it at the moment. Picked up a few TP's on some sats but not too many.

Both antennas 1,8m, so if you using proper LNBs than performance should be more or less same (difference is not noticeable by simple means). I suspect you should spend more time tuning your antennas, using proper LNBs and better adjusting of them. Which satellites are you receiving? How many TPs are received? What are signal levels? E.t.c.?

 

[archive10]

I have a 1.8 offset channel master and a 1.8 PF channel master, which would be the best for receiving C-band? I have just put a C-band LNB on the offset but not having too much luck with it at the moment. Picked up a few TP's on some sats but not too many.

I'd dare to speculate that the PF would be easiest to fit a C band LNB on, as the offset CM180 has a 40 mm LNB holder which is not easily replaceable, whereas I would guess that your pf is, if not born with a c band size clamp, then at least easily modifiable.
As @RimaNTSS says the performance should be the same.
Pics would be great!

 

[parkiepie420]

hi pipedream

im in Sheffield also and im working off a gibertini 1.25m dish and ive just posted my finding with my dish !!

hope this helps you out ??

my cband findings on my gibertini 1.25m dish

 

[Pipedream]

Can you post a few pictures of your setup?

I will take a few pics today. At the moment I only have the 1.8 offset set up.

 

[Pipedream]

I'd dare to speculate that the PF would be easiest to fit a C band LNB on, as the offset CM180 has a 40 mm LNB holder which is not easily replaceable, whereas I would guess that your pf is, if not born with a c band size clamp, then at least easily modifiable.
As @RimaNTSS says the performance should be the same.
Pics would be great!

As you say the offset has a 40mm LNB holder, I have clamped a 60mm holder behind the 40mm clamp, this restricts the movement both forwards and backwards with the LNB.

 

[Pipedream]

Both antennas 1,8m, so if you using proper LNBs than performance should be more or less same (difference is not noticeable by simple means). I suspect you should spend more time tuning your antennas, using proper LNBs and better adjusting of them. Which satellites are you receiving? How many TPs are received? What are signal levels? E.t.c.?

I am receiving
20 east
3933 V 27500 Q 82%
4053 V 27500 Q 87%
17 east
3933 V 27500 Q 81%
4019 V 20830 Q 70%
4053 V 27500 Q 87%
24 west Nothing
22 west Nothing
11 west Nothing
5 west
3731 V 11963 Q 36%
4114 V 2143 Q 65%
4128 V 3483 Q 68%
4137 V 2510 Q 65%
4154 V 2290 Q 77%
4159 V 1945 Q 65%
4162 V 1500 Q 76%
0.8 west Nothing
These were scanned last night using a TM 5302 I think it's a Western Digital LNB I am using it is one that has been kicking around in the garage for a couple of years.

 

[Huevos]

If it is for multi LNB an offset dish is going to be superior due to the longer focal distance.

 

[RimaNTSS]

I am receiving

And you receiving this with offset or PFA?
I did think your original question was:

I have a 1.8 offset channel master and a 1.8 PF channel master, which would be the best for receiving C-band?

Now it is only left to install another antenna and compare results.
Are we speaking about central (not multifeed) LNBs on both antennas?

 

[RimaNTSS]

Sorry @Pipedream , I did not see pictures you added. Nice installation. I only think that side feedarms do not allow to place LNB properly. As you said: movement of LNB is restricted.
Could you post pictures with higher resolution please?

 

[Pipedream]

And you receiving this with offset or PFA?
I did think your original question was:

Now it is only left to install another antenna and compare results.
Are we speaking about central (not multifeed) LNBs on both antennas?

Only using the offset at the moment with single LNB

 

[Pipedream]

Sorry @Pipedream , I did not see pictures you added. Nice installation. I only think that side feedarms do not allow to place LNB properly. As you said: movement of LNB is restricted.
Could you post pictures with higher resolution please?

These should be better, it will not let me upload original size photos

 

[Archived-1]

Are you scanning with plate in/out on the correct satellites, looking at the lnb it needs more skew for using the plate in if you are in Sheffield ? your ip suggests different ?

 

[Pipedream]

Are you scanning with plate in/out on the correct satellites, looking at the lnb it needs more skew for using the plate in if you are in Sheffield ? your ip suggests different ?

The plate is in. Which way would it require skewing? or would I be better replacing the LNB holder with this type?

 

[beavs2112]

I'd dare to speculate that the PF would be easiest to fit a C band LNB on, as the offset CM180 has a 40 mm LNB holder which is not easily replaceable, whereas I would guess that your pf is, if not born with a c band size clamp, then at least easily modifiable.

Thanks for the new pics. It looks like the feed is not in the right position and like you say movement is limited. I agree with st1. Without seeing your dish i'll say the PFA should be easier to fit an lnb to. A 1.8m PF Channel Master is a rare dish indeed (at least here in north America). I've only ever seen pics once. Does yours look like this

 

[Pipedream]

Thanks for the new pics. It looks like the feed is not in the right position and like you say movement is limited. I agree with st1. Without seeing your dish i'll say the PFA should be easier to fit an lnb to. A 1.8m PF Channel Master is a rare dish indeed (at least here in north America). I've only ever seen pics once. Does yours look like this View attachment 86176

Apart from the LNB cover it is identical. I have the pole mount for it, it fits onto a 3.5" pole if I remember right

 

[nelson_b]

hi -
as @RimaNTSS said i think the lnb. holder and side arms are stopping you being able to get the exact / correct position for the lnb and feed --- it is not so easy to setup on a 1.8 offset dish the side arms need to be wider and lower ... if the C band l.n.b. is sitting in the original k.u holder it will be a little to high --- have you tried lowering the dish elevation a bit to compensate for this -- it may help to improve things -- but a re- design of the way the side arms are fastened is the way to go on this dish --- i get pretty good results from mine with the C band l.n.b offset about 6 degrees and k/u in centre position

regards - nelson .b.