Using C120 Feedhorn on Channelmaster?

**Channel Hopper** · 01-01-2008

Originally Posted by Rd100

Right here it goes the circular option is for satellites the use left & right hand circular

Also you are wrong with the requirements you only need a dual linear / circular orthogonal for VSAT ( 2 way satellite Internet) as you need two ports one port for the c120 lnb and one for the BUC (transmitter)

I cannot see where Canofan requires a feed for the two way VSAT system, every part number given relates to a receive only adapter/depolariser for a 0.6 f/d dish.

Besides anyone using a BUC on a motorised system needs to have additional VSAT licence requirements, ( usually covered by SNG status in the UK but may differ overseas).

I would strongly advise a separate dish for the Internet over satellite system, allowing it to remain fixed and operational when looking for reception of satellite TV channels.

02-01-2008

I did not say he did need a vsat feed??? i was just telling him what a dual feedhorn is for i do know how vsat works i look after a fleet of vsat systems across the uk at broadcast and uplink sites

I suggest you read post #17 again before jumping to concussions the part where i said

"Also you are wrong with the requirements YOU ONLY need a dual linear / circular orthogonal for VSAT ( 2 way satellite Internet) as you need two ports one port for the c120 lnb and one for the BUC (transmitter)"

.

Originally Posted by Channel Hopper

I cannot see where Canofan requires a feed for the two way VSAT system, every part number given relates to a receive only adapter/depolariser for a 0.6 f/d dish.

Besides anyone using a BUC on a motorised system needs to have additional VSAT licence requirements, ( usually covered by SNG status in the UK but may differ overseas).

I would strongly advise a separate dish for the Internet over satellite system, allowing it to remain fixed and operational when looking for reception of satellite TV channels.

**frankg4553** · 02-01-2008

Originally Posted by CROSSBONES

An andrews/channel master feed horn is the best match for your dish.

Inverto or Invacom are excellent lnb's. The Invacom quad is said to get better results.

do a search on the subject, it has been covered many times.

I believe the Inverto is better for longer runs of cable from Dish to receiver.
My cabling is about 45 metres....reception is superb.

Frank

**Channel Hopper** · 03-01-2008

Originally Posted by Rd100

I did not say he did need a vsat feed??? i was just telling him what a dual feedhorn is for i do know how vsat works i look after a fleet of vsat systems across the uk at broadcast and uplink sites

I suggest you read post #17 again before jumping to concussions the part where i said

"Also you are wrong with the requirements YOU ONLY need a dual linear / circular orthogonal for VSAT ( 2 way satellite Internet) as you need two ports one port for the c120 lnb and one for the BUC (transmitter)"

.

I've read post 17 again and it still makes for confusing reading when applied to Canofan and the information (receive only) link.

Besides, dual feeds are used in receive only systems , namely those that have dual band LNBs (11 and 12 GHz types) in a non 22kHz distribution network, or where the cost/logistics of installing a second dish is prohibitive.

**canofan** · 03-01-2008

Hi Channel Hopper,
Could you expand further on the use of the:

Ku Feed RxO 611606210
Polarization: dual linear, orthogonal.

I posted a new thread on "fringe reception" concerning the invacom QPF quad LNB.
Perhaps your lead will help conjugating these two elements for even better reception.

**Channel Hopper** · 03-01-2008

Originally Posted by canofan

Could you expand further on the use of the:

Ku Feed RxO 611606210
Polarization: dual linear, orthogonal.

I posted a new thread on "fringe reception" concerning the invacom QPF quad LNB.
Perhaps your lead will help conjugating these two elements for even better reception.

Cant expand much more,this is the appropriate feed for use with your system,from the information you have given to date.

The type of LNB will be determined by your purchasing powers and availability, but there is not much performance difference between the well known brands on the market, I would notspend too much time looking at the paper statistics, buy one, fit it,and report.

03-01-2008

On my home 1.2m i have a tried all the ku-band feeds and i have kept the 611-6060-07 on the dish as it cover the whole ku band, If i wanted higher gain i would use a bigger dish.

**canofan** · 23-01-2008

It is now clear that using single band LNB's is the most efficient way to go. One has to accept the idea of using one LNB per polarity. As any attempt to use switching will reduce SNR.
But how about using two Norsat 4000A one for horizontal and the other for vertical? combining both on one feedhorn, specialised in the band selected, let us say 11.7 to 12.2 gHz.
Could an Andrews vsat combiner hold both LNB's and feed them through the same feedhorn?
I was thinking putting the verticals on the less advantaged BUC port.
I have been oogling the items attached to this post.

Prodelin · 23-01-2008

Good luck with your fantacy dream.

**canofan** · 24-01-2008

Originally Posted by Prodelin

Good luck with your fantacy dream.

I have no choice as I cannot use a bigger dish, simply because I am at the size limit with the CM120 and a bigger dish would require anchoring with bolts to the roof.
Fantasy dreams are good drivers, they push you to investigate and, perhaps, finally find.
The choice of LNB-feedhorn is the way to go.
I already discovered thanks to you guys that using an Invacom QPF does not further the matter for me.
I am forced now to fully investigate the more expensive way of using a Norsat4206A LNB for Horizontals and the cheaper NJR2744H KU DRO LNB for Verticals with one Andrew 611-6062-10 feedhorn, to provide both the horizontal and vertical polarities to a multiswitch. The 611-6062-10 provides, on both flanges, with the same VSWR of 1.3:1. This should cover for me with the CM120 dish, in Belgium, the critical band 11.7 to 12.2ghz (24/7, rain or shine) for Showtime and ADD on Nilesat

Prodelin · 24-01-2008

I read that in the UK it's better to live in an apartment 5 floors up or more because then you are allowed to have up to 120cm dish on your balcony.

Is that true?

**canofan** · 24-01-2008

As I live in Belgium, at the moment, so I have not been informed of the trend.
In Belgium, I battled 3 years to be allowed access to the roof and that at the condition that I supply 19.2E and 13E to whoever requires it in the building. My balcony is badly oriented. But you cannot be forbidden a less than 80cm dish, as at this size and below it is reputed invisible.

**rolfw** · 24-01-2008

Originally Posted by Prodelin

I read that in the UK it's better to live in an apartment 5 floors up or more because then you are allowed to have up to 120cm dish on your balcony.

Is that true?

No it isn't true, the rules for dishes on apartment blocks are in the sticky thread at the top of this section, but dishes on apartment blocks are also normally controlled by the management company or housing association in the first instance, the planning guidelines cover the entire block.

**canofan** · 25-01-2008

Originally Posted by Channel Hopper

I've read post 17 again and it still makes for confusing reading when applied to Canofan and the information (receive only) link.

Besides, dual feeds are used in receive only systems , namely those that have dual band LNBs (11 and 12 GHz types) in a non 22kHz distribution network, or where the cost/logistics of installing a second dish is prohibitive.

As I have learned, from Channel Hopper, that the dual feeds were designed for receive only. The specs for the Andrew 611-6062-10 feedhorn call for use in the 11.7 to 12.2 ghz. So it was meant for separate Vertical Horizontal standard LNB's in the 11.7 to 12.2 ghz band.

25-01-2008

There is two versions of the 6062-10 a single flange version and a twin flange we only use the twin for RX-TX vsat.

The single is just the same as the twin but the twin comes with the twin waveguide but with the single you just bold the lnb direct to the feed like you do at the moment,

Originally Posted by canofan

I have no choice as I cannot use a bigger dish, simply because I am at the size limit with the CM120 and a bigger dish would require anchoring with bolts to the roof.
Fantasy dreams are good drivers, they push you to investigate and, perhaps, finally find.
The choice of LNB-feedhorn is the way to go.
I already discovered thanks to you guys that using an Invacom QPF does not further the matter for me.
I am forced now to fully investigate the more expensive way of using a Norsat4206A LNB for Horizontals and the cheaper NJR2744H KU DRO LNB for Verticals with one Andrew 611-6062-10 feedhorn, to provide both the horizontal and vertical polarities to a multiswitch. The 611-6062-10 provides, on both flanges, with the same VSWR of 1.3:1. This should cover for me with the CM120 dish, in Belgium, the critical band 11.7 to 12.2ghz (24/7, rain or shine) for Showtime and ADD on Nilesat

**canofan** · 25-01-2008

Originally Posted by Rd100

There is two versions of the 6062-10 a single flange version and a twin flange we only use the twin for RX-TX vsat.

The single is just the same as the twin but the twin comes with the twin waveguide but with the single you just bold the lnb direct to the feed like you do at the moment,

.

The one with a single flange is the 661-6060-10. The 2 in 6062-10 refer to the twin.
What if I used the Twin flanged for two Norsats. Surely this is an unorthodox way of using it. But I do not see, technically, any contraindication especially that both waveguides have an identical VSWR of 1.3:1.

blobber · 29-01-2008

From the illustrations those twin flange VSAT feedhorn assemblies look to me like a bog standard C120 feedhorn, to which a standard OMT has been bolted on the back. If not what does the extra wave component do exactly that is different from the standard sort of OMT, as has been used with two WR75 LNB, one each for H and V, for receive-only for many years past?

chaco33 · 26-07-2008

Originally Posted by keano

m8 it is a must that you use matched feedhorn with the CM dish.

I have both the invacom c120 single and inverto c120 single and found the invcacom slighter better than the inverto.

I have order the invacom quad but 8 days on still have not received it.

I am able to get most H beams OK now 24/7 from 7.0w but I have a 2.4mtr dish I don't know if you can in Belgium with your dish size.

i have a 2.4 mts channel master dish too, can you tell me what type of feed horn and lnb do you use? is this ln ku band linear?

chaco33 · 27-07-2008

Originally Posted by keano

Hi m8,

Yes I can get 12399H 24/7 here and is one of the strongest H transponders for me.

Regarding the feedhorn then the same one covers CM 120,180,240.

Its the length of the arms that allows the feedhorn to see the right amount of dish face.

can you tell me what´s the length of the main arm and the side arms of your offset channel master dish? because i have the mane one, but just the dish. i have to build the arms.

thank you...

***wod*** · 27-07-2008

cant you contact andrew or now as they are know asc signal and order a set of feed arms for the dish ?

**Turok** · 27-07-2008

Hello!
now andrew is out of bisness,when i call the the owner,they are not very helpfull,,maybe when you have a conpany you have more luck!
today,its nearly imposible to find old channel master stuff,out of production we have nothing thats the answer ,in austria the satelite antena section,is completly colsed...

chaco33 · 28-07-2008

Originally Posted by keano

m8 it is a must that you use matched feedhorn with the CM dish.

I have both the invacom c120 single and inverto c120 single and found the invcacom slighter better than the inverto.

I have order the invacom quad but 8 days on still have not received it.

I am able to get most H beams OK now 24/7 from 7.0w but I have a 2.4mtr dish I don't know if you can in Belgium with your dish size.

Keano can you tell me the arms lenght of the main support lnb and the side arms of your channel master 2.4 mts offset dish please?

because i lost my CM 2.4 mts main and side arms lnb support and i want to buil them, but i need the exact measure of each one of them.

thank you...

**canofan** · 29-07-2008

Originally Posted by chaco33

Keano can you tell me the arms lenght of the main support lnb and the side arms of your channel master 2.4 mts offset dish please?

because i lost my CM 2.4 mts main and side arms lnb support and i want to buil them, but i need the exact measure of each one of them.

thank you...

Please Be careful. the arms have a particular geometry made to place the boss in the proper position. CM feedhorns fit in the boss and the LNB is placed in the ideal spot. it allows only skewing of the LNB.
I recommend that you try find the arms or replace them with the original CM/Andrew/ASCsignal. Unless you can borrow them from somebody to build an exact replica and I really mean exact.

chaco33 · 29-07-2008

is there a CM 2.4 mts specifications document around the internet that i can download?

or anyone of you fellas would be kind enough to go outside and take measurement of the arms ( three of them) and give me that info please...?

thank you very much...

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