Xref: utzoo sci.electronics:5625 rec.video:5912
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!csd4.milw.wisc.edu!marque!carroll1!tkopp
From: tkopp@carroll1.UUCP (Tom Kopp)
Newsgroups: sci.electronics,rec.video
Subject: Re: MTS Stereo TV Decoder query
Summary: Proper chip, source, etc.
Message-ID: <329@carroll1.UUCP>
Date: 20 Mar 89 09:06:02 GMT
References: <2943@rtmvax.UUCP>
Reply-To: tkopp@carroll1.UUCP (Tom Kopp)
Distribution: na
Organization: Carroll College-Waukesha, WI
Lines: 29

In article <2943@rtmvax.UUCP> mazda@rtmvax.UUCP (John Wilson) writes:
>
>	Are any such (any brand) MTS Decoders still in production?
>	Is the MPX OUT signal a composite FM signal of both audio
>my building a decoder using the ECG1655 TV STEREO DECODER Integrated
>circuit or equivalent?


Well, having been working on just such a project, I can pass the info on to you.

The proper chip to use is the LM1884 (I believe, but I cannot seem to find my
documentation).  The box I've got is in Radio Electronics c. 2/87 I believe.
Might have been 2/88, but...  It was a 2 part article, so Feb and March at
any rate.  There are plans for building an MTS decoder in various methods,
including straight MPX output, modifications to a non-stereo VCR as well as
building a 'probe' (antenna tuned to 4.5 and attached to TV) which will
pass the appropriate information to the decoder box which has a left and
right line level output on it, as well as a headphone jack.  You will probably
want to do some tweaking w/ the box once you get it built, as when you actually
order some of the parts from a person here in Milwaukee, you get what amounts
to an 'upgrade' kit.  The original (article) used an FM stereo decoder...
the LM1884 is a fairly new (less than a year?) chip specifically designed, like
the 1655, for TV stereo.  Good luck!


-- 
"Patience is a virtue, and I'm virtually bankrupt!" - Me
tkopp@carroll1.UUCP or uunet!marque!carroll1!tkopp
Thomas J. Kopp @ Carroll College 3B2 - Waukesha, WI