A friend of mine gave m a chart that shows the focal distances for various dishes, like KTI, Uniden and so forth. Using the formula, F=(D*D) / (16*C) I can't make the numbers work on the chart he gave me. His dish is a 10 foot diameter Unimesh and its 19.25 inches deep. The chart says the focal distance for his dish is 48 inches. Using the formula above, I come up with 46.75, not 48.
I've been out of school for 46 years and my math skills may be a little rusty. I'm curious, whose right, the charts or me. The focal lengths on the chart he gave me are supposed to be manufacturer specifications.
I've been out of school for 46 years and my math skills may be a little rusty. I'm curious, whose right, the charts or me. The focal lengths on the chart he gave me are supposed to be manufacturer specifications.