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Post by Druid Hills Radio on Jan 10, 2018 20:28:48 GMT
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Deleted
Deleted Member
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Post by Deleted on Jan 10, 2018 21:36:39 GMT
Guarded Admission
I read Radio World for the articles.
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Post by Druid Hills Radio on Jan 10, 2018 21:38:28 GMT
Guarded AdmissionI read Radio World for the articles. I read it hoping to find some scantly clad hot chicks in the transmitter building. |
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Post by part15engineer on Jan 11, 2018 14:27:21 GMT
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Post by Boomer on Jan 11, 2018 23:49:06 GMT
Pulse Width Modulation can be so efficient that most of the power that goes into a transmitter goes out as signal, it's one in a long line of technical improvements to transmitters.
Transmitters in the early days of radio would be 25 percent efficient and less. Even going from tubes to transistors could save hundreds of watts in filament power alone. Today's AM transmitters are around 90 percent efficient, and at a technological peak!
Where PWM could help us as home broadcasters most is in the field of carrier current, a cheaper power bill for transmitters running several watts or more.
PWM is worth it at 100 milliwatts too I think, with a modulator circuit almost as simple as some other P-15 transmitters have. Also, audio response down to DC or near is good Carl, if you want to use newer processing techniques like Stereo Tool or hardware processors will do, for loudness. It can only help..
Boomer
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