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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Tue, 18 Aug 92 20:03:25 GMT
- From: toddi@mav.com (Todd Inch)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Looking for Intercom/Baby Monitor
- Message-ID: <telecom12.646.8@eecs.nwu.edu>
- Organization: Maverick International Inc.
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 646, Message 8 of 10
- Lines: 36
-
- In article <telecom12.613.12@eecs.nwu.edu> johnk@secondsource.COM
- (John Kennedy) writes:
-
- > If one were looking for a baby/nursery monitor, is it a fair
- > assumption to use the same criteria as when looking for a cordless
- > phone? Am I right in assuming that they would use the same
- > frequencies, similar designs, etc.?
-
- I own pieces to about three different brands of baby monitors. They
- are all quite similar and all have an A/B channel switch. The
- channels seem quite compatible between different brands, and with the
- neighbor's units as well, unfortunately.
-
- The frequencies aren't compatible with my older wireless Radio Shack
- intercoms, which also have an A/B channel switch.
-
- Fortunately, they are FM so the noise is lower than AM and you can't
- hear the neighbors if your transmitter is nearer and turned on. Some
- have batteries in the transmitter as well as AC, which I've used on
- occasion when travelling to allow me to leave the sleeping baby in the
- car with the monitor (for VERY brief periods) while I used the rest
- stop facilities.
-
- My biggest gripe is that the last one I bought had the same plug but
- different polarity AC adapter, and immediately blew up when I plugged
- in an adapter of different polarity but correct voltage. I tend to
- leave an AC adapter in each room and carry the monitor to the room, so
- it is a MAJOR problem to have two receivers with different polarity
- plugs. I ended up adding a polarity guard diode and reversing the
- wiring in the offending unit to match the majority of my AC adapters
- and hide the other adapters far away.
-
- Of course, if you don't try to mix and match, you don't have to worry
- about these issues.
-
-