• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

Channel Master plastic feed support clamp help!

Messages
8
Likes
0
My Satellite Setup
Old 1.2 m Andrews Channel Master dish,MTI Supreme Line Universal Twin,Axing SKB95-01 cables,Nokia Mediamaster 9800S,Pace MSP991 positioner
My Location
Croatia @ 45:33:33:86 North 18:40:03:85 East
#1
Hello all,
My first post here...I'm really glad that I found this forum!:-worship
After some inactive years (due to a major reconstruction job at my house) I managed recently to put up once again my sat system.As you can see from my profile,it's a modest/old line of components but that's all I could get in a region where satellite receiving was an expensive sport a while ago.
Thus been said,I encountered a problem with the plastic LNB clamp:it presents some serious cracks on the lower side of the 40 mm neck.I used some Epoxy to put the pieces on place and now it holds pretty well but I know that this is only a temporary solution...I'd like to replace it with a new one.
The only store I found is at
_http://www.satellitesuperstore.com/dishes-motors2.htm
(the item is somewhere at half page).
My question is:does somebody know another source for this (rather obsolete) part?
The price asked on satellitesuperstore.com is unexpectedly high (as compared to,say,a Titanium LN:cool:...not that I'm cheap but....or maybe I have a wrong picture?
Aside of that,because of my prior unpleasant experiences with orders coming from UK (the local customs are playing havoc here),I'd prefer another (from continental Europe or US) dealer to work with (no pun intended).
My second problem is regarding the so-called "skew" of a LNB.
My dish is motorised (five years ago,I managed to get everything having a fair footprint in my area,between 18W and 36E) and I read somewhere on this board that on motorised dishes you don't need to take the skew angle into account but align the LNB on 90 degrees with the horizontal dish' axis.Is that true?

Thank you very much from your time and help!
Best regards,
Le Basseur
 

Turok

Regular Member
Messages
2,237
Likes
1
My Satellite Setup
1,25 Fibostop
Jäger Smr 1224 & Smo 36 Dual Axsis Motor
Dynasat F1
Monterey 140
Drembox 800
sky Pace HD Box
Tagra 2,20 M Fullsize Dish
Echostar 2,40m Mesh for cband!
My Location
Austria
#2
Hello!
what,is the exactly type,or part number,of the chapparal item,you looking for?
chapparal,closed in europe every Head quatar,that means,no bisness here,when you order,something,from overseas,you dont have,warenty @ all..

for skew controlling you need a polarizer,on between the lnb,and your dish,for example the hirschmann csp 1210 that i have,hard to get,out of production long time ago!
to problem,on most satelite reveivers yo got on the market,you can save,and store,the skew,only one time,for the curent satelite,and not for the,curent transponder!
 

Burnham Beech

Specialist Contributor
Messages
1,003
Likes
32
#3
Someone else posted this US site here a few weeks ago. Your feed clamp is $13.99 here - futurevisionsat.com/catalog/item/691952/1783035.htm

Your assumptions on skew are correct for most conditions.
 
Messages
8
Likes
0
My Satellite Setup
Old 1.2 m Andrews Channel Master dish,MTI Supreme Line Universal Twin,Axing SKB95-01 cables,Nokia Mediamaster 9800S,Pace MSP991 positioner
My Location
Croatia @ 45:33:33:86 North 18:40:03:85 East
#4
Hello Turok,
Thanks for your fast reply!:)
Turok said:
what,is the exactly type,or part number,of the chapparal item,you looking for?
I think there's a misunderstanding...I'm not looking for a Chapparal part but Channel Master.
It looks like this:

View attachment 12377



Turok said:
for skew controlling you need a polarizer,on between the lnb,and your dish,for example the hirschmann csp 1210 that i have,hard to get,out of production long time ago!
to problem,on most satelite reveivers yo got on the market,you can save,and store,the skew,only one time,for the curent satelite,and not for the,curent transponder!
Again,a little confusion:AFAIK,the LNB I use doesn't need the device you mentioned.I referred to the FIXED mounting position of the LNB itself.
Again,thank you!
Best regards,
Le Basseur
 

Attachments

Messages
8
Likes
0
My Satellite Setup
Old 1.2 m Andrews Channel Master dish,MTI Supreme Line Universal Twin,Axing SKB95-01 cables,Nokia Mediamaster 9800S,Pace MSP991 positioner
My Location
Croatia @ 45:33:33:86 North 18:40:03:85 East
#5
Hey,
That's more like it!Thanks for the link!:-worship

Burnham Beech said:
Your assumptions on skew are correct for most conditions.
Usually,I hate asking silly questions...can you be more specific,please?What do you mean by "most conditions"?
Best regards,
Le Basseur
 

wod

Specialist Contributor
Messages
4,214
Likes
232
My Satellite Setup
1m channel master, jaeger smr1224, Inverto black ultra twin, technomate tm-1500ci, broken receiver vantage x221ci, New additions Skybox F5s and technomate tm-5402 HD arriving soon.
My Location
yorkshire
#6
on the dish i presume you are using the channel master feed horn on the dish then the c120 lnb will just fit on with the spacers provided with the lnb feed clamp and you can just position it straight as the polar mount or motor on the dish will tilt the dish as it moves on the arc
 
Messages
8
Likes
0
My Satellite Setup
Old 1.2 m Andrews Channel Master dish,MTI Supreme Line Universal Twin,Axing SKB95-01 cables,Nokia Mediamaster 9800S,Pace MSP991 positioner
My Location
Croatia @ 45:33:33:86 North 18:40:03:85 East
#7
Wod,
Thanks for your reply!
wod said:
on the dish i presume you are using the channel master feed horn on the dish
Again,a little confusion here:unfortunately,I DON'T have a LNB/feedhorn tandem as I bought my ChannelMaster dish second-hand (I think I'm the fourth owner:-doh2!).The dish came with an ancient Fuba LNC and a modest feedhorn of an unknown provenience.For some reason,the last proved to be defective no matter what I tried (replaced the LNC,tried another dish,etc) so I had to give up and "upgrade" with a MTI LNB.
Therefore,it's the LNB's skew angle what I asked about.
Anyway,the question remains the same regarding some other specific details,unknown by a newbie like me but well-known to most of the "afficionados" on this board.
My dish is located at:
45:33:33:86 North
18:40:03:85 East
According to the book,I aimed the "0" (highest elevation) polarmount's position to Astra @19,2E.For other satellites on both curve's ends,do I have to tilt the MTI LNB or can I align it by 90 degrees regarding to Astra's horizontal axis?
(I'm aware it might be a "trial-and-error" procedure in order to get the best of it but I sincerely hope that someone else has a more pertinent explanation and experience...simply because my dish's placement makes a PITA any repetitive intervention).
Thanks!:)

Best regards,
Le Basseur
 

Burnham Beech

Specialist Contributor
Messages
1,003
Likes
32
#8
WOD has answered your question, you fit the LNB as you have described, there is no need to tilt the LNB to account for skew.

If this is not clear to you perhaps can you give more details.
 

wod

Specialist Contributor
Messages
4,214
Likes
232
My Satellite Setup
1m channel master, jaeger smr1224, Inverto black ultra twin, technomate tm-1500ci, broken receiver vantage x221ci, New additions Skybox F5s and technomate tm-5402 HD arriving soon.
My Location
yorkshire
#9
Le Basseur said:
My dish is located at:
45:33:33:86 North
18:40:03:85 East
According to the book,I aimed the "0" (highest elevation) polarmount's position to Astra @19,2E.For other satellites on both curve's ends,do I have to tilt the MTI LNB or can I align it by 90 degrees regarding to Astra's horizontal axis?
Best regards,
Le Basseur
yes align it up on astra 19east and then leave the lnb with no skew so central in the lnb holder as the polar mount tilts the dish as it moves giving the perception of the lnb being skewed
 

Neophasis

ASBO Club Member, AKA Likvid
Messages
30
Likes
0
My Satellite Setup
None
My Location
EU
#10
In theory yes you don't need to skew the LNB as the polarmount moves according to the clarke belt, but in reality skew needs to be aligned and peaked at some sats.

My suggestion to you is to peak the dish at 28.2 East, NOT Eurobird.

Peak the skew here for your LNB, when you have done it you will not lose much signal on other sats as the 28.2 East is the most important as this satellite got some odd polarization offset compared to the others.

But you are right, what you are after is a polarizer, you can find one on Ebay, look for Hirschmann CSP1210 or Chaparral Omni, don't get a ferrite polarizer like IRTE or SMW as they don't work good with digital broadcast and does make it even worse.
 
Messages
8
Likes
0
My Satellite Setup
Old 1.2 m Andrews Channel Master dish,MTI Supreme Line Universal Twin,Axing SKB95-01 cables,Nokia Mediamaster 9800S,Pace MSP991 positioner
My Location
Croatia @ 45:33:33:86 North 18:40:03:85 East
#11
Neophasis & Wod,
Thank you both for your replies!
This kind of infos is what I expected!

Best regards,
Le Basseur