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Ah...To ground or not to ground, that is the question. Actually a longtime debate between amateur radio hobbyists for decades upon decades. Argument (1): Ground it to provide a path to ground for static and lightning. Argument (2): Ground it and you're just asking for a lightning strike...

Oh no please don't tell us if you decide to use Popsicle sticks because, if you do, from that point on you'll be "PopsicleNMore" in my mind. Sorry for the sick humor.

If you're talking of the "Local Channels", you're out of luck. They're "Spot Beams" that are transmitted with a highly directional signal to a limited area. You may be lucky to find a wild feed somewhere, but they'd be unreliable for daily viewing. I hope that local channels will be able...

Bad info. Don't know where you got your info, but my spec. book shows 6061-T6 alloy, which will work in most instances as a substitute for carbon steel pipe in the diameters needed to fit mounting brackets on small sat. dishes and affords corrosion resistance.

Rigid electrical conduit is also available in aluminum. It has the same dimensions as Sch.40 aluminum pipe, and will be threaded on both ends. Will be expensive wherever you buy it, but it won't rust.

I experimented with a Cassagrain subreflector on a 10' FRP dish in 1983. Geometry and instructions were supplied by Butch Simpson, in one of his experimenter's guides. Butch worked for HP in Greeley, CO for his day job and sold experimental TVRO kits as a hobby. Several of his circuits were...

Sorry to say I never got past the early design stage. Saved a 1.8M from the scrap heap and gave the 1.2M to a fellow member of this board. Harold

It's called a Cassagrain feed. Also used on telescopes and large microwave dishes. Illuminates larger dishes to their fullest extent.

Sir: It's clear from your posts that you're grinding the hell out of that axe. Your negative posts are starting to "grind" on my nerves. Respectfully, Harold

Seems like we've got a few of us on here that want this venture to fail. Makes me wonder if we're seeing someone with an "axe to grind" against the venture. Why not just put a cork in it and keep the negative speculations to yourself?

Looks like you need some more research. You're rotating the wrong axis and it's not pointing at Polaris (the North Star). See the attached picture. Harold

The basic geometry of a polar mount is that the axis of rotation points directly at Polaris (the North Star), which rotates the dish in an arc that coincides with the Clark Belt on which the communication satellites orbit. Your axis of rotation appears to point to the center of the Earth. Harold

There is no geometric shape defined as "bowl". It would be impractical for an incandescent light reflector to be manufactured any way other than as a parabolic. It is a parabolic reflector with the focal point located at or near the filament of a standard light bulb. A light reflector...

A few points on your feedhorn: It's not conical. Conical means cone shaped. A straight side connecting two circles- like a funnel. Look at the curved profile in the photos. What you have is a parabolic light reflector. Its shape was designed to reflect light emitted by an incandescent...

I didn't realize it until I read a recent article on aiming Prodelin dishes that the bottom bend of the strut is used to set the polar angle. See the note on the attached picture. Your picture shows it perfectly.

You may be confusing "skew" with "polarization" as it relates to Corotor II type feed on a prime focus dish on a "polar" type mount. The servo motor, by way of wiring from the receiver, physically rotates a probe (small antenna) within the feethorn 90 degrees to align with horizontal or...

Simple to say, not easily done. Signals have to be in phase with each other, which can't be done without very sophisticated software and hardware.

Notice that the bracket is curved to fit along the back of the dish. You attached the bracket from the other dish down, too low below the center of the dish and now the scale has no reference to the new dish. You could place a long, straight object (2"x4") vertically on the front side of the...

Pipe sizes are nominal inside diameters up thru 12" pipe (12.75" outside diameter), after that the size is the outside diameter. 3" pipe, no matter if it's schedule 10, 20, 40 or 80 is 3.5" outside diameter. Inside diameters vary depending on wall thickness (schedule). Harold

You're looking for 3" schedule 40 black pipe (Galvanized may be available but costs more) or 3.5" O.D. tubing with a minimum .125" wall thickness (usually more expensive because it's used for driveshafts). Welding shops, machine shops, some hardware stores that cut and thread pipe, and scrap...

Patience is your best friend on this if the store owner can't help you now. I spotted a 1.8M Prodelin on the roof of a closed down Blockbuster Video and watched if for about a year. Could tell it wasn't in use because the feedhorn had been removed. A cell phone company moved in the store...

A free 1.2M Channelmaster Offset Feed Dish on Craig's List in Northeast Florida. Free 1.2M Channelmaster Offset Feed Dish

Not everyone is aware of the loads the post and foundation must overcome with only moderate windloading of a dish. Several thousand pounds of force can easily be applied to a ten foot solid dish by a high wind. Multiply that by the length of the post, which acts as a lever, and you're asking...

May take a copyright lawyer to say for sure, but I think if you charged a fee you'd, in fact, be infringing on the station's copyright of their programming.