Channel Master/Laminas 1.8m project

Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
29,667
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK
Very lucky you thought of adding the chain .
 
John

John

Enthusiast.
Messages
2,466
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
>>-What make actuator was it?
An 8" Venture (there's a pattern developing here).. Will put a 12" one on.-<<
Have to agree CJ, size really matters
 
scopus

scopus

Specialist Contributor
Messages
2,211
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
A weather warning out for here tomorrow night into Wednesday, gale force winds expected...
gusts of 75mph.
 
A

archive10

Guest
Going put a beefier actuator on there but needs some metalwork adjustments.
Well... to me it looks a bit like it's really a matter of putting a beefier hoop at the end of the actuator arm... looks like is can be removed and substituted with something else stronger??
I mean, if the actuator works fine, then why not repair the mechanical failure?
One could wonder, though, if some suitable counterweights might ease the load on the actuator?
Of course, against a really strong gust of wind this won't make a difference, but perhaps it might ease the strain...
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
29,667
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK
Well... to me it looks a bit like it's really a matter of putting a beefier hoop at the end of the actuator arm... looks like is can be removed and substituted with something else stronger??
I mean, if the actuator works fine, then why not repair the mechanical failure?
One could wonder, though, if some suitable counterweights might ease the load on the actuator?
Of course, against a really strong gust of wind this won't make a difference, but perhaps it might ease the strain...

The old hoop can most likely be unscrewed from the rest, but a small actuator is not going to last on a vertical set CM dish. CJ might get some reprieve by inverting the dish, offsetting redesign and a bit of counterweight mass, but it will probably not impress the neighbours.
 
scopus

scopus

Specialist Contributor
Messages
2,211
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
When I got my heavy duty Venture, the heavy duty Superjack, which the Venture replaced now does the inclination and declination on my 1.8 CM.
 
John

John

Enthusiast.
Messages
2,466
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
When I got my heavy duty Venture, the heavy duty Superjack, which the Venture replaced now does the inclination and declination on my 1.8 CM.


did the same on mine as well Chris.
 
RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
4,990
My Satellite Setup
Some SAT-related hardware.
My Location
N-E from Riga
I was thinking about this issue many times but still do not know proper solution. Change of declination for any offset antenna is needed just a couple of degrees that is equal to maybe couple of centimeters of the movement of the actuator arm. But then 18,24, 36' actuators are not necessary do do the job. Would be enough to have 2' actuator but very powerful. Instead of that, it could be possible to use some kind of lever arm moved by lets say 18' actuator where movement of 18' would change elevation of the dish by only couple of degrees. I just not ready to offer sone technical solution to do that but I am sure it is possible. This is just thinking out of the box.
I hope I am understood in my explaining of the idea.
 
Trust

Trust

Specialist Contributor
Messages
918
My Satellite Setup
1.8 m CM at SMR 1224 + Elev. with 7 lnb changer Ku (lin - circ) - Ka (lin - circ) C (lin - circ)
My Location
Nijmegen Netherlands
And make the lever in that way , the actuator has to push to get the dish backwarts .
 
A

archive10

Guest
I was thinking about this issue many times but still do not know proper solution. Change of declination for any offset antenna is needed just a couple of degrees that is equal to maybe couple of centimeters of the movement of the actuator arm. But then 18,24, 36' actuators are not necessary do do the job. Would be enough to have 2' actuator but very powerful. Instead of that, it could be possible to use some kind of lever arm moved by lets say 18' actuator where movement of 18' would change elevation of the dish by only couple of degrees. I just not ready to offer sone technical solution to do that but I am sure it is possible. This is just thinking out of the box.
I hope I am understood in my explaining of the idea.
Very well explained.
And exactly what I was thinking.... With suitable mechanical balance, very little actual force might be needed to move reflector.
As for mechanical strength - shouldn't the small actuator be sufficient (if properly made?)
 
RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
4,990
My Satellite Setup
Some SAT-related hardware.
My Location
N-E from Riga
Something in those lines: If actuator is connected to the points B and C. Yellow lines represent fixed infrastructure to the mount. Lever arm is red. Of course, position of the points A, B, C, D, E and F should be carefully calculated. The picture is only schematics . Declination.jpg
 
aceb

aceb

Specialist Contributor
Messages
1,503
My Satellite Setup
Prof Tuner 7301 /
1.25m Gibertini + Inverto B.Ultra/C1W, Moteck H180, 68.5E-67W Ku/C-Band /
1.8m Precision PF + ESX241/Inverto Black Pro, 66E-63W Ku/C-band /
2.4m Fortec Star+Titanium C1W/Pride plate, 49E-58W
My Location
Sussex
First real blow of the autumn forecast for tonight so the 1.8 is locked down and 1.2 swung over to 90°E to lower it's profile against the wind. Radio mast is wound over into the garden and tethered and all garden furniture has been put away for the winter, I hate this time of year :(
 
scopus

scopus

Specialist Contributor
Messages
2,211
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
First real blow of the autumn forecast for tonight so the 1.8 is locked down and 1.2 swung over to 90°E to lower it's profile against the wind. Radio mast is wound over into the garden and tethered and all garden furniture has been put away for the winter, I hate this time of year :(
Makes Winter even longer having rubbish weather in September....usually a nice month.
 
Captain Jack

Captain Jack

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Staff member
Messages
10,982
My Satellite Setup
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My Location
North Somerset
Welp, last night was the windiest - up to 60mph apparently. Thankfully, nothing else snapped and I am still getting max signal on the usual satellites.

Will spend this weekend putting the new jack on. Like all the ideas to ease the strain on it but I am far too lazy, so it'll just be a bigger jack...
 
Last edited:
S

s-band

Contributor
Messages
848
My Satellite Setup
1.5m IRTE PF, Octagon OSLO external Ref., TBS6983,
Various L, S, C, X & Ka bits. 1.2m S/X/Ku/Ka Prodelin on Az-El
My Location
SE UK
Captain Jack

Captain Jack

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Messages
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My Satellite Setup
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My Location
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Today's work reminded me of this... Replacing a lightbulb

First, the bigger jack wouldn't fit on the original bracket, so had to make that bigger. After a lot of faffing, with the jack finally on, I found that it wasn't counting pulses. A bit of troubleshooting revealed that the reed switch was short circuit... took one from the 8" jack that broke (internals are the same, more or less) and it's finally on.

2017-09-16 15.11.17.jpg

Yesterday's snapshot...

2017-09-15 18.32.27.jpg
 
scopus

scopus

Specialist Contributor
Messages
2,211
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
Hooked up a chain myself...just in case!P1010073.JPG
 
scopus

scopus

Specialist Contributor
Messages
2,211
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
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