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#23
November 2nd 08, 12:35 AM
posted to rec.radio.shortwave
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KFI transmitter off the air
Telamon wrote:
In article , "David Eduardo" wrote: "Telamon" wrote in message ... I'll assume that there are 10 modules so each would put out about 3 amps. The outputs could be protected by limiting that source current and there would also have to be a another protection against VSWR. Maybe a temperature sensor on the output FET but that might be too slow. So how do the separate modules work together? Do they all put out the same voltage and current in phase through some kind of card backplane? The principle manufacturers of solid state transmitters are Harris, BE, and Nautel in the US/NA. Each as a website, and I believe there are both functional diagrams and some white papers about design. I have never worked inside a big ss transmitter so am of limited use in describing how they work. Thanks for answering my questions Eduardo. I'll check those sites out. Can you tell me who makes the hardline between transmitter and antenna? I'm just the curious sort. I have never really worked with RF power and I just haven't though of the obvious answers to some of the questions I have asked in the thread. In my work experience the RF power is 0 dBm and less coming out of equipment like network analyzers and synthesizers. I can tell you that there is a lot more to actually fabricating electronics than the schematics can explain. www.eriinc.com/pubs/Catalog07_168-171.pdf Scroll down for specs at 0.64 MHz |
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