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On Mar 23, 9:21 pm, Cecil Moore wrote:
Keith Dysart wrote: You are trying too hard. Even your problem statement said "no circulator". So I offer a simple example of such a generator: a voltage source connected by a 450 Ohm resistor to the output terminal. Voila: a generator with 450 Ohm output impedance. The generator is an *active dynamic source*. It does not have a 450 ohm output impedance just because you install a 450 ohm resistor. Just as soon as reflected waves are allowed to reach the source, the source impedance dynamically shifts away from the 450 ohm value. I notice that you've skipped the important question posed in the example. I'll try again. Use my generator: voltage source, 450 Ohm resistor to the output. No circulator. Drive your system: 450 Ohm line terminated with a 75 Ohm TV receiver. TVSG-----1000 feet 450 ohm ladder-line---75 ohm TV RCVR Ghosts or no? If no? Where did the 'reverse power' go? If ghosts? Well, think very carefully before choosing this option because there aren't. ....Keith |
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