Just Sharing This My Channel Master 1.8 project.

Currently can get about 8db on 7west MBC channels i have had 17.5db on sky news on 1west which surprised me
 
Manikm909 said:
No I didn't even try mate. Still struggling with arc. I need to take dish off and pay attention to pole level . It's one or the other . Strong west's or strong easts
Click to expand...
The pole needs to be dead plumb with no movement. Maybe more outriggers required??
 
scopus said:
The pole needs to be dead plumb with no movement. Maybe more outriggers required??
Click to expand...
Yeah . I thought it was but it ain't
 
Manikm909 said:
Currently can get about 8db on 7west MBC channels i have had 17.5db on sky news on 1west which surprised me
Click to expand...
MENA beam coming in here around 6.5 dB..nilesat.webp
 
I'll check after my DJ set mate
 
...
 

Attachments

  • 16441919061737722954773091593424.webp
    16441919061737722954773091593424.webp
    239.3 KB · Views: 26
Manikm909 said:
No I didn't even try mate. Still struggling with arc. I need to take dish off and pay attention to pole level . It's one or the other . Strong west's or strong easts
Click to expand...
If you set up a camera with tripod at about 3m away and take two good images of the polarmount / back of the dish at far east/west travel, you should see if the top of the post has shifted.
 
no.....but i have spent all day reinforcing pole, and getting it as plumb as can be - didnt have time to do any arc tracking , but after testing tonight, currently the central sats are strong, but both sides after 19 degrees or so gets weak .....i hope to get it right tomorrow

i think motor angle needs decreasing slightly, and dish raising a little....
 
took me 2-3 days constant hours to get my mabo aluminium dish tracking the arc correctly,thats why i have not bothered to start all over again with my cm 1.8m lol lol
 
and heres a question really would it be worth setting up the cm 1.8m motorised as in would there much of a boost in signals compared to the mabo 1.85m dish v the motorised 1.8m cm on ku band?.i don,t there would be really,i stand corrected.................................
i know the cm 1.8m is a far better dish but does that bring better results db signal than the mabo 1.85m ??
 
butchyboy said:
and heres a question really would it be worth setting up the cm 1.8m motorised as in would there much of a boost in signals compared to the mabo 1.85m dish v the motorised 1.8m cm on ku band?.i don,t there would be really,i stand corrected.................................
i know the cm 1.8m is a far better dish but does that bring better results db signal than the mabo 1.85m ??
Click to expand...


Personally, I am not sure if it is worth the bother unless the parabolic profile is out of shape on the mabo 1.85m dish.

You could motorise the CM 1.8m on C-Band as dual axis with an elevation/declination actuator as well as the Azimuth actuator.
There would be no worries about a super accurate arc, just use the dual axis actuators for peaking maximum signal levels.

C-Band is less crtitical than Ku-Band anyway so any auld arc will be OK and the dual axis actuators can squeeze the juice.
 
Last edited:
butchyboy said:
and heres a question really would it be worth setting up the cm 1.8m motorised as in would there much of a boost in signals compared to the mabo 1.85m dish v the motorised 1.8m cm on ku band?.i don,t there would be really,i stand corrected.................................
i know the cm 1.8m is a far better dish but does that bring better results db signal than the mabo 1.85m ??
Click to expand...

Put both up, use the Mabo for C band and the Channel Master for Ku and Ka.

You know you want to.
 
evening all - a little update.

so i spent most of yesterday levelling the pole, and making it more sturdy. when i finished the pole was as true as can be, HOWEVER - once that polar mount goes on, theres a slight gap and once that dish goes on, that gap gets closed due to the dish load - so all the hard work on pole goes out the window.

spent a good while today trying to track arc - however, although it is tracking, but im still getting lower east signals than expected.

im getting nice signals on 1w, 3w, 7w, 30w (18db) - but moving over to east, its not as good as my 1.2m

im getting average db's on rai for instance, like 14db on Rai 1 HD - it should be much higher...however, whatever i do to increase the east it naffs up the west - in my experience, this isnt a tuning issue this is a levelling issue. you may disagree....it might be, i get the feeling it isnt to....it shouldnt be this diffciult.

is the dish weight pulling things forward, and skewing the arc....im at a loss, but not too fussed as the 1.2m is tracking easterns nicely - and the west is where the cband stuff is when i start tinkering with that - and ive currently got that tuned in ok.
 
Back
Top