Trust
Specialist Contributor
- My Satellite Setup
- 1.2 m Echostar at Twotec twinrotor with lnb changer
- My Location
- Nijmegen Netherlands
Trying some time ago to build the best C-Ku lnb combo , I noticed that a DE plate disturb the linear C and Ku signals . So I decided to make a 3 lnb changer , C-Lin - C-Circ and Ku .
For C-Circ the "bottle" depolariser with stubs was the most effective to my set-up .
However its performance change by the frequency , some signals improved by pulling the "bottle" a little bit out of the wavepipe .
Since the only at my location receiveble (120 cm dish) C-Lin signals dissapeared ( 10º E) there was no need for that lnb anymore . A Ka lnb could fill that place .
But to keep the possabillity receiving C-Lin in the future I (hopefully) develloped a way to receive both , C-cic and C-lin in one lnb by rotating the "bottle" in such position it dont interfear the Hor en Vert lin signals .
Also improvement of the Circ signals at different frequencys by turning it a little bit instead of pulling it out .
So I made a prototype but to test it I have put a set-up at a other location since more east as 46º I cannot receive by trees .
For the moment I use a small E-motor to a even small gear box , no feedback or end switches .
Finaly I intend to use a servomotor as used by RC cars and boats .
The gear ring around the wave pipe is made of a 63 mm PVC pipe adapter .
It was a hell of a job to make those 39 teeth to it .
For C-Circ the "bottle" depolariser with stubs was the most effective to my set-up .
However its performance change by the frequency , some signals improved by pulling the "bottle" a little bit out of the wavepipe .
Since the only at my location receiveble (120 cm dish) C-Lin signals dissapeared ( 10º E) there was no need for that lnb anymore . A Ka lnb could fill that place .
But to keep the possabillity receiving C-Lin in the future I (hopefully) develloped a way to receive both , C-cic and C-lin in one lnb by rotating the "bottle" in such position it dont interfear the Hor en Vert lin signals .
Also improvement of the Circ signals at different frequencys by turning it a little bit instead of pulling it out .
So I made a prototype but to test it I have put a set-up at a other location since more east as 46º I cannot receive by trees .
For the moment I use a small E-motor to a even small gear box , no feedback or end switches .
Finaly I intend to use a servomotor as used by RC cars and boats .
The gear ring around the wave pipe is made of a 63 mm PVC pipe adapter .
It was a hell of a job to make those 39 teeth to it .
