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On 9/9/2010 10:05 AM, dave wrote:
... 50 Ohms is the characteristic impedance of RG58/U, the defacto standard SWL cable. 50 Ohms is also the nominal impedance of the unbalanced external RF input on virtually every receiver so equipped. The hose rule says you can't feed water from a fat hose (Hi-Z) into a hose of lesser diameter (Low Z) without spilling some. If you go the other way, no spillage. The point of the MLB is to keep the highest impedance from the antenna at or below 50 Ohms. I have 45 years professional experience in broadcast engineering. I used to maintain the transmitter (3,800 KW ERP) broadcasting station in Los Angeles. I know Magic T combiners and trombone phase adjusters. Magic and technology are indistinguishable to the average mook. Great. You just said everything I have been saying using different words and phrasing ... kewl ability, knack, trick, ability ... there are probably many levels you would like to take the discussion to in order to obfuscate minds and impress idiots ... however, we are discussing baluns/unun and you, your great accomplishments, your skills of being a great father, etc. are of no interest to me, what-so-ever ... but hey, others may like to hear it. Regards, JS |
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