http://www.amateurlogic.com/blog/?p=30 Wed, 19 May 2010 08:46:17 +0000 hourly 1 http://wordpress.org/?v=3.0.1 http://www.amateurlogic.com/blog/?p=30&cpage=1#comment-3196 ka0spm Mon, 09 Jul 2007 04:49:07 +0000 http://www.amateurlogic.com/blog/?p=30#comment-3196 I think there is a video on utube about it it was in Nevada. They used a 3 meter wire dish with a ring yagi in the focal point. I am betting close to 20 dB of gain. The decibel concept was a tough one It was a big part of the CATV design. We all had to learn it from correspondence courses. It never made sense for a long time. I think there is a video on utube about it it was in Nevada. They used a 3 meter wire dish with a ring yagi in the focal point. I am betting close to 20 dB of gain. The decibel concept was a tough one It was a big part of the CATV design. We all had to learn it from correspondence courses. It never made sense for a long time.

]]> http://www.amateurlogic.com/blog/?p=30&cpage=1#comment-3191 Administrator Sun, 08 Jul 2007 21:12:59 +0000 http://www.amateurlogic.com/blog/?p=30#comment-3191 Thanks for the math. We don't have any mountains around here, so 125 miles would not be possible... Thanks for the math.
We don’t have any mountains around here, so 125 miles would not be possible…

]]> http://www.amateurlogic.com/blog/?p=30&cpage=1#comment-3185 ka0spm Sun, 08 Jul 2007 19:16:45 +0000 http://www.amateurlogic.com/blog/?p=30#comment-3185 I loved the direct tv dish segment. But the power gain you got was alot more than 4 times. you were right on with 3 dB as double but 10 dB is 10 times the power level. Decibels are logarithms to the base 10. Voltage bd is 6 dB is double and 20 dB is 10 times the signal. The current record for WIFI is 125 miles at 10 mb/s. You guys ought to shoot for the record. I loved the direct tv dish segment. But the power gain you got was alot more than 4 times. you were right on with 3 dB as double but 10 dB is 10 times the power level. Decibels are logarithms to the base 10. Voltage bd is 6 dB is double and 20 dB is 10 times the signal. The current record for WIFI is 125 miles at 10 mb/s. You guys ought to shoot for the record.

]]> http://www.amateurlogic.com/blog/?p=30&cpage=1#comment-214 Najs Sun, 03 Dec 2006 14:33:41 +0000 http://www.amateurlogic.com/blog/?p=30#comment-214 Great work so far. More, more, more... Especially about the radio :) Great work so far. More, more, more… Especially about the radio

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