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#1
November 1st 07, 08:57 PM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
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#2
November 1st 07, 09:29 PM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
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#3
November 2nd 07, 02:49 AM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
On Thu, 01 Nov 2007 21:29:38 +0000, Dave wrote:
only 100%??? Actually... Most AM broadcasters utilize asymmetrical modulation where they often allow %115 positive peaks |
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#4
November 4th 07, 12:37 AM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
"yea right" wrote in message news  On Thu, 01 Nov 2007 21:29:38 +0000, Dave wrote: only 100%??? Actually... Most AM broadcasters utilize asymmetrical modulation where they often allow %115 positive peaks In case you missed it, the 500 KW was in the 1930s. 250 KW of audio was not easy to come by. Last I heard WLW was using a Harris 50 KW digital AM transmitter. See http://download.harris.com/app/publi...d.asp?fid=1489 .. Digital here means that the AM signal is digitally synthesized at high level. There is no modulator. Tam/WB2TT |
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#5
November 4th 07, 05:43 PM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
In case you missed it, the 500 KW was in the 1930s. 250 KW of audio was
not easy to come by. Last I heard WLW was using a Harris 50 KW digital AM transmitter. See http://download.harris.com/app/publi...d.asp?fid=1489 . Digital here means that the AM signal is digitally synthesized at high level. There is no modulator. ___________ Harris has supplied MW AM transmitters of this design at carrier powers up to 2 megawatts. |
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#6
November 11th 07, 03:18 AM
posted to rec.radio.amateur.antenna
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WLW - 700 kHz, 500 kW, 100% modulation, no limiter
John, N9JG wrote:
http://www.ominous-valve.com/wlw.html John, I grew up in the shadow of the WLW tower and not too far away Voice of America antenna farm. Thanks for reminding me of this great radio history in Cincinnati. John AB8O |
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