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- Newsgroups: rec.radio.shortwave
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsc!cbfsb!cbnewsb.cb.att.com!wa2ise
- From: wa2ise@cbnewsb.cb.att.com (robert.f.casey)
- Subject: Re: RICV radio (for the blind) - need info
- Message-ID: <1993Jan2.212708.26499@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <Dec.29.09.58.21.1992.12869@cadenza.rutgers.edu> <1993Jan1.023132.1@auvax1.adelphi.edu>
- Date: Sat, 2 Jan 1993 21:27:08 GMT
- Lines: 15
-
- In article <1993Jan1.023132.1@auvax1.adelphi.edu> schmidt@auvax1.adelphi.edu writes:
- >Since the SCA's use, in most cases, subcarriers with low deviation and low
- >injection, to avoid degrading the main channel signal of the station, they are
- >not full fidelity services, kind of "AM" quality or so, and the coverage is
- >less than that of the station they are piggybacked on, kind of like stereo
- >compared to mono, only quite a bit worse, as far as service area reduction is
- >concerned. Also most SCA receivers restrict the reproduced bandwidth to reduce
- >crosstalk from the main channel.
-
- In past years, I've tried building SCA detectors into various FM radios.
- One thing I could never get clean was the damn interference from the main
- audio signal of the FM station. I've also had acquired commercially built
- SCA recievers (McMartin I think one brand) and they also had similar
- interference. What am I overlooking? Antennas? Or does the system
- have a fundamental flaw?
-