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Article #481Re: HD RADIO is no worse than DAB or DRM radio
From: Don Pearce
Date: Fri, 09 Nov 2007 16:05
Date: Fri, 09 Nov 2007 16:05
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2481 bytes
On Fri, 09 Nov 2007 15:59:17 GMT, "Earl Kiosterud" <someone@nowhere.com> wrote: >Was AM radio ever allowed audio to 15 KHz? I read many years ago that it was, perhaps >before the NRSC recommendation was adopted by the FCC. I presumed that the stations either >were allowed to overlap 5 KHz (doubtful), or that stations in a given area were separated by >at least 30 KHz. >-- >Regards from Virginia Beach, > >Earl Kiosterud >www.smokeylake.com > > Years ago, here in London an interesting thing happened. Audio was fed to our big AM transmitter by landline, which had a hopeless frequency response, losing a great deal of HF. This was equalised in the channel filter for the transmitter, resulting in flat AM out to about 5kHz. Anyway, at some point the land line was replaced with a much better one, but nobody thought to tweak the channel filter to suit the new frequency response, resulting in audio which was flattish out to at least 12 if not 15kHz. we had really good quality AM for quite a while. d -- Pearce Consulting http://www.pearce.uk.com
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X-Google-Thread: fb1f8,428391383e1324a5 X-Google-Thread: 10a749,428391383e1324a5 X-Google-Thread: 114aac,cd4ad6cadcf2b245 X-Google-Thread: f7d8a,cd4ad6cadcf2b245 X-Google-Attributes: gidfb1f8,gid10a749,gid114aac,gidf7d8a,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!newsfeed.stanford.edu!sn-xt-sjc-03!sn-xt-sjc-01!sn-post-sjc-01!sn-post-ams-01!supernews.com!corp.supernews.com!not-for-mail From: nospam@nospam.com (Don Pearce) Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast Subject: Re: HD RADIO is no worse than DAB or DRM radio Date: Fri, 09 Nov 2007 16:05:32 GMT Organization: Posted via Supernews, http://www.supernews.com Message-ID: <4735846d.973426453@news.plus.net> References: <1191096585.135753.167530@d55g2000hsg.googlegroups.com> <46ffb388.44729093@news.plus.net> <1191099764.677637.18050@22g2000hsm.googlegroups.com> <1191108136.459409.212620@50g2000hsm.googlegroups.com> <%vBLi.275$0I5.137@trnddc08> <1191140172.205755.136880@y42g2000hsy.googlegroups.com> <Crqdndk7urPjlp3anZ2dnUVZ_g-dnZ2d@championbroadband.com> <KJudnWNZ2vjHGpjanZ2dnUVZ_vumnZ2d@giganews.com> <pt%Yi.403$CI1.60@trnddc03> X-Newsreader: Forte Agent 1.5/32.451 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@supernews.com Lines: 31