Home |
Search |
Today's Posts |
#1
![]() |
|||
|
|||
![]()
Hello i am looking for a dish steerable in both ways vertical and horizontal
second hand hard to find guess anybody? regards willy |
#2
![]() |
|||
|
|||
![]() "Euro-Motors" wrote in message ... Hello i am looking for a dish steerable in both ways vertical and horizontal second hand hard to find guess anybody? regards willy A few of these are/were made for customers who intended to simply aim their big dishes and leave them. The type of mount you described is called an AZ/EL mount, short for azimuth / elevation, which are separately settable, usually by means of hand cranks but sometimes motors. They may or may not have built-in calibration scales. Your best source would be the phone company, cable company or TV station. As more and more entities get fiber optic connections, their dishes are becoming available for sale (or even giveaway). Many small AZ/EL mounts are sold, but most are for small dishes only (0.8 -1.5 meter) and these would be too flimsy for your dish. A subset of the AZ/EL dish is the "ring mount" or "patio mount." These are essentially for portable use. I cannot see one of these for a dish over about 2 meters. The other type mount is called a polar mount, because it pivots on an axis that's parallel to an imaginary line connecting the poles; it couples azimuth and elevation changes together as it tracks a smooth arc. Most people bought them because they intended to change satellites often -- homes, bars, restaurants. I only have the polar mount in use here, but I offer up these names that I might simplify your search. It is not unreasonable to build your own AZ/EL mount out of wood. I did it for a 1.5 meter dish with only a few 3/4-inch pine planks. (Bigger dish -- bigger lumber.) Good Luck. |
#3
![]() |
|||
|
|||
![]() "Sal M. Onella" wrote in message ... "Euro-Motors" wrote in message ... Hello i am looking for a dish steerable in both ways vertical and horizontal second hand hard to find guess anybody? regards willy A few of these are/were made for customers who intended to simply aim their big dishes and leave them. The type of mount you described is called an AZ/EL mount, short for azimuth / elevation, which are separately settable, usually by means of hand cranks but sometimes motors. They may or may not have built-in calibration scales. Your best source would be the phone company, cable company or TV station. As more and more entities get fiber optic connections, their dishes are becoming available for sale (or even giveaway). Many small AZ/EL mounts are sold, but most are for small dishes only (0.8 -1.5 meter) and these would be too flimsy for your dish. A subset of the AZ/EL dish is the "ring mount" or "patio mount." These are essentially for portable use. I cannot see one of these for a dish over about 2 meters. The other type mount is called a polar mount, because it pivots on an axis that's parallel to an imaginary line connecting the poles; it couples azimuth and elevation changes together as it tracks a smooth arc. Most people bought them because they intended to change satellites often -- homes, bars, restaurants. I only have the polar mount in use here, but I offer up these names that I might simplify your search. It is not unreasonable to build your own AZ/EL mount out of wood. I did it for a 1.5 meter dish with only a few 3/4-inch pine planks. (Bigger dish -- bigger lumber.) Good Luck. I am familar with someone using a TVRO antenna is this manner, azimuth rotation was enabled by slidng another piece of tubing over the mast. More information I dont have. Jimmie |
#4
![]() |
|||
|
|||
![]() "Jimmie D" wrote in message ... "Sal M. Onella" wrote in message ... "Euro-Motors" wrote in message ... Hello i am looking for a dish steerable in both ways vertical and horizontal second hand hard to find guess anybody? regards willy A few of these are/were made for customers who intended to simply aim their big dishes and leave them. The type of mount you described is called an AZ/EL mount, short for azimuth / elevation, which are separately settable, usually by means of hand cranks but sometimes motors. They may or may not have built-in calibration scales. Your best source would be the phone company, cable company or TV station. As more and more entities get fiber optic connections, their dishes are becoming available for sale (or even giveaway). Many small AZ/EL mounts are sold, but most are for small dishes only (0.8 -1.5 meter) and these would be too flimsy for your dish. A subset of the AZ/EL dish is the "ring mount" or "patio mount." These are essentially for portable use. I cannot see one of these for a dish over about 2 meters. The other type mount is called a polar mount, because it pivots on an axis that's parallel to an imaginary line connecting the poles; it couples azimuth and elevation changes together as it tracks a smooth arc. Most people bought them because they intended to change satellites often -- homes, bars, restaurants. I only have the polar mount in use here, but I offer up these names that I might simplify your search. It is not unreasonable to build your own AZ/EL mount out of wood. I did it for a 1.5 meter dish with only a few 3/4-inch pine planks. (Bigger dish -- bigger lumber.) Good Luck. I am familar with someone using a TVRO antenna is this manner, azimuth rotation was enabled by slidng another piece of tubing over the mast. More information I dont have. Jimmie I think he only had a few degrees of rotation and he used a linear actuator to turn it. Im not sure of what he was using it for, maybe TV. I had assumed that it was something else at the time because of the modification |
#5
![]() |
|||
|
|||
![]() "Jimmie D" wrote in message ... "Jimmie D" wrote in message ... "Sal M. Onella" wrote in message ... "Euro-Motors" wrote in message ... Hello i am looking for a dish steerable in both ways vertical and horizontal second hand hard to find guess anybody? regards willy A few of these are/were made for customers who intended to simply aim their big dishes and leave them. The type of mount you described is called an AZ/EL mount, short for azimuth / elevation, which are separately settable, usually by means of hand cranks but sometimes motors. They may or may not have built-in calibration scales. Your best source would be the phone company, cable company or TV station. As more and more entities get fiber optic connections, their dishes are becoming available for sale (or even giveaway). Many small AZ/EL mounts are sold, but most are for small dishes only (0.8 -1.5 meter) and these would be too flimsy for your dish. A subset of the AZ/EL dish is the "ring mount" or "patio mount." These are essentially for portable use. I cannot see one of these for a dish over about 2 meters. The other type mount is called a polar mount, because it pivots on an axis that's parallel to an imaginary line connecting the poles; it couples azimuth and elevation changes together as it tracks a smooth arc. Most people bought them because they intended to change satellites often -- homes, bars, restaurants. I only have the polar mount in use here, but I offer up these names that I might simplify your search. It is not unreasonable to build your own AZ/EL mount out of wood. I did it for a 1.5 meter dish with only a few 3/4-inch pine planks. (Bigger dish -- bigger lumber.) Good Luck. I am familar with someone using a TVRO antenna is this manner, azimuth rotation was enabled by slidng another piece of tubing over the mast. More information I dont have. Jimmie I think he only had a few degrees of rotation and he used a linear actuator to turn it. Im not sure of what he was using it for, maybe TV. I had assumed that it was something else at the time because of the modification I used another method. I regret I don't have any pictures to link but I will try to describe what I did: I took two pine planks of a size that would make nice shelves, joined them at one end with a hinge and laid them flat. Call them #1 & #2 I bolted the dish to the top plank (#1) so it was facing the sky. By propping up the top plank (#1) using a toothed rod, I could set the elevation to any value I wanted. I used a homemade inclinometer to set the elevation whenever I changed satellites. (Plank #2 stayed flat on the ground all the time.) I experimented with calibrating the toothed rod itself but I was never happy with it. The inclinometer was perfect every time. I placed a third plank (#3) on the ground under the hinged end of plank 2. With plank #1 temporarily raised very high, I drilled a single hole through both planks #2 and #3 as they lay flat on the ground and inserted a bolt through the hole. A nut on the bolt made the connection snug but not tight. I put casters under plank #2 at the end opposite the hinge. The hinged planks (#1 & #2) pivoted around the bolt for the azimuth setting. Plank #3 never moved after being placed. For azimuth calibration I determined where the edge of my sidewalk was with regard to true south. I made a photocopy of a protractor and taped it to Plank #3. I attached a paper-clip pointer from the end of plank #2 to read out the azimuth. This was not entirely satisfactory. Parallax error was a bitch. I could get it close but usually have to tweak it in on a station. This bizarre arrangement is not an entirely original idea; it's actually an adaptation of the ring mount, using some material I had on hand. I had the full arc, minus blockage from my neighbor's nut tree There is no reason you couldn't use a lazy susan or an old swivel chair base to vary the azimuth. A see-saw arrangement could vary the elevation, eliminating the hinge and one plank. Remember, I just used what I had. Good luck. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Wire diameter vs Impedance | Antenna | |||
WTB a bunch of small diameter PHILLYSTRAN | Swap | |||
Variable diameter antenna | Antenna | |||
VHF yagi element diameter | Antenna | |||
Feedpoint impedence / wire diameter | Antenna |