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Toni wrote:
This is something I have always thought: When driving loops, very short monopoles (VLF) or other low-impedance antennas, why raise transmitter Z to 50 ohms, send it through the line and lower it again to whatever required? 40-50 years ago, we had to lower the transmitter Z usually with a built-in adjustable pi-net tuner. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#2
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Hi Cecil
En Cecil Moore va escriure en Wed, 12 May 2004 09:44:10 -0500: 40-50 years ago, we had to lower the transmitter Z usually with a built-in adjustable pi-net tuner. Do you mean before the existence of electronic simulators, when people actually build electronic apparatus? :^) When I studied electronics I was in the last course where students would actually build things. From the next course on student's practices would be made only by computer simulations :^( As to your comment, I know valves exist but I have never learned / been taught how to use them. :^( 73s Toni - EA3FYA |
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