Different generations of Channel Master matching feed horns put to test

Franky_D

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Here you can see tests of three different feed horns, presumably manufactured in different times by different successors of Channel Master, but they are all CM matching feed horns. I gave names to all three (in the attached comparison) in order to distinguishing between them in this test, although the names are probably not reflecting the historical reality (sorry and correct me if you have more historical info).


Test Location: Copenhagen, Denmark.

Dish: Channel Master 1.2

Satellites used for the test:
- 36E (Eutelsat 4W and Eutelsat 7W);
- 28.2E (Astra 2F and 1N).

I used 2 satellites in order to have more objective test results. I am at the edge of the footprints for both of them. On 36E I tested feed horns for both both linear and circular signal reception; on 28.2E - linear only.

As a result of the test i came to the conclusion:

[SIZE=12.800000190734863px]- CM feedhorn (grey color) performed better than others in the range 11.7-12.7 both in linear and circular [/SIZE]polarization.

- Andrew and Raven feed horns (white color, corrugated, with scalar rings) performed better in the range 10.7-11.7.

- There was marginal difference between Andrew and Raven feed horns, Andrew feed horn was a notch better.

- Results of the test seem to be in accordance [SIZE=12.800000190734863px]with the attached Datasheet from Skyware (one of the manufacturers of CM equipment at some time)! :) [/SIZE]
 

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  • Skyware_Global_Ku-band_Receive_Only_Dual_Polarization_Feed_Kit_Datasheet.pdf
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Captain Jack

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Now where do you buy this CM feedhorn....
 

Franky_D

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Captain Jack said:
Now where do you buy this CM feedhorn....
I was lucky to get one from a guy on a US based forum. :)
 

bonou2

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Who wants/need to buy this feedhorn Channel Master
<span>can buy from orbitadigital-Spain-Oviedo - Asturias - España :-righton :-righton :-righton </span>
<span> </span>
<span><span>best regards bonou2</span></span>
 

Channel Hopper

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Franky_D said:
Here you can see tests of three different feed horns, presumably manufactured in different times by different successors of Channel Master, but they are all CM matching feed horns. I gave names to all three (in the attached comparison) in order to distinguishing between them in this test, although the names are probably not reflecting the historical reality (sorry and correct me if you have more historical info).
You can get historical reality by use of the Wayback machine on the oritinal ste

For example

http://web.archive.org/web/20030625053158/http://www.channelmaster.com/pdf/kufeeds.pdf
 

Franky_D

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Channel Hopper said:
You can get historical reality by use of the Wayback machine on the oritinal ste

For example

http://web.archive.org/web/20030625053158/http://www.channelmaster.com/pdf/kufeeds.pdf
Thank you! It's a great link! It puts models and names to the pictures! ;)

Would it be also possible to find out if dual-mode feed horn (MODEL 611-6060-10) was manufactured only by Channel Master? Or possibly also manufactured by it's succesors (Skyware, Andrew, Raven)? Is it still manufactured?

It seems that the only channel master matching feed horn sold at the moment in new condition is the corrugated one:
[SIZE=10pt]- http://www.satellitesuperstore.com/raven_andrews_channel_master_feedhorn.htm#andrews – UK company[/SIZE]
[SIZE=10pt]- http://www.orbitadigital.com/799-guia-ondas-channel-master-skyware.html - Spanish Company[/SIZE]
[SIZE=10pt]- http://www.kjaerulff1.com/da-dk/p/527_Ku_RxO_wideband_SP_feed_kit_with_junction_block - Danish company[/SIZE]
 

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Ohhh, that's very interesting. Looks like earlier types were specific to a narrower frequency band.
 

Channel Hopper

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Captain Jack said:
Ohhh, that's very interesting. Looks like earlier types were specific to a narrower frequency band.
The non scalar designed feed was - from memory - a cost cutting exercise as it could be machined quicker than the scalar design and used fewer materials


It was also produced for only a short time.
 

samoloko

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@Franky_D
do you have shots with scalar rings for the other two feeds - Andrew and CM
 

samoloko

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thank you for the pic
looks like andrew and raven are identical
channel master got to have less scalars - It Is not viewable
 

Franky_D

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thank you for the pic
looks like andrew and raven are identical
channel master got to have less scalars - It Is not viewable

There are no scalar rings in the feed horn with i called "Channel Master" in my tests.
 
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