Channel master c120 feed horn wanted

Chris James

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Hi
I’m in need of a c120 feed horn for channel master dish
Bought one from eBay but it got lost
Anybody can help be great
Thanks
 

ozumo

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A long neck universal LNB will be fine. Inverto IDLR-SINL42-EXTND-OPP Single for a tenner on Amazon, or an Inverto Black Ultra twin for about £20 would work well.
 

Chris James

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A long neck universal LNB will be fine. Inverto IDLR-SINL42-EXTND-OPP Single for a tenner on Amazon, or an Inverto Black Ultra twin for about £20 would work well.
Thanks I’ll look into that it’s just I like the look of the c120 but guess they are hard to find
 

malsat

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think I've a brand new one in the garage, ill check tomorrow
 

Channel Hopper

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A long neck universal LNB will be fine. Inverto IDLR-SINL42-EXTND-OPP Single for a tenner on Amazon, or an Inverto Black Ultra twin for about £20 would work well.
All that R+D and you believe a universal feed can compete ?
 

ozumo

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All that R+D and you believe a universal feed can compete ?
I have a CM feed horn which came with a couple of SMW singles, both were comfortably out performed by an Inverto Black Ultra.
 

nelson_b

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My Satellite Setup
Strong 4375 driving a 2.4 m Channel .Master. offset + Invcom Quad C120 K/U l.n.b. + BSC 421 and Zinwell C band l.n.b.,s - DR HD F15 - TM5302 - Octagon SX88+Optima - GT Media V7 - HD receivers. + other dishes currently in use - Antique 3.0 m Prodelin P.F. - Alcoa 1.8 m P.F. - Channel Master. 1.2 m.
My Location
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I have a CM feed horn which came with a couple of SMW singles, both were comfortably out performed by an Inverto Black Ultra.
Same findings here ..... on my Channel masters - ...... not by such a big margin on the 1.8 ... but on 1.0 metre and 1.2 metre - the black ultra and a some other modern l.n.b.f,s were notably better than the C.M. feed / C120,s
 

manikm909

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sad but true - i have a Smart Titanium LNB to clamp \ convert onto CM feed horn as a test
 

Channel Hopper

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Same findings here ..... on my Channel masters - ...... not by such a big margin on the 1.8 ... but on 1.0 metre and 1.2 metre - the black ultra and a some other modern l.n.b.f,s were notably better than the C.M. feed / C120,s
As per the other feedhorn thread, I will take some dimensions this weekend, the feeds that I had were for receive and transmit and may have a waveguide that is tuned for uplink frequencies. Receive characteristics in the 11-12GHz band would be less important, opening the guide diameter by 1mm may help improve things.
 

ozumo

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My Location
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Just did a quick test on 1.9 east 90cm CM 12168V 30000:
Inverto Black Ultra Twin: 9 - 9.5db
SMW Single LO 10.750 + CM feed horn: 10db

Then it started raining. The SMW + feed required an increase in elevation. Will have to test some once the weather improves.
 

ozumo

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My Satellite Setup
Raven mk2 zone 2 x4, Channel Master: 90cm x3, 1.2m x2, 1.8m PF. CM polar mount x2, AZ/EL x3.
My Location
South Durham
Just did a quick test on 1.9 east 90cm CM 12168V 30000:
Inverto Black Ultra Twin: 9 - 9.5db
SMW Single LO 10.750 + CM feed horn: 10db

Then it started raining. The SMW + feed required an increase in elevation. Will have to test some once the weather improves.
Just tested again with clear sky:
1.9 east 90cm CM 12168V 30000:
Inverto Black Ultra Twin: 11.6db
SMW Single LO 10.750 + CM feed horn: 10.3db

This is more like how I remembered it was.
 

Chris James

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Right so got a c120 feed horn and smw LNB
Thing it doesn’t fit in the feed arm bracket am I missing something
 

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Chris James

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What am I missing?
 

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ozumo

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Raven mk2 zone 2 x4, Channel Master: 90cm x3, 1.2m x2, 1.8m PF. CM polar mount x2, AZ/EL x3.
My Location
South Durham
The black adapter, dimensions in this post:
 

manikm909

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yeah, the 40mm adapter.

i have this feed horn and adapter i need to shift.
 

manikm909

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ozumo

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My Satellite Setup
Raven mk2 zone 2 x4, Channel Master: 90cm x3, 1.2m x2, 1.8m PF. CM polar mount x2, AZ/EL x3.
My Location
South Durham
Just remembered I may have a spare that came with the dish Dggrr gave me. I'll check tomorrow.
 
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