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From: mikey@trsvax
Newsgroups: net.auto
Subject: Chrysler radio info
Message-ID: <55200186@trsvax>
Date: Fri, 28-Jun-85 16:27:00 EDT
Article-I.D.: trsvax.55200186
Posted: Fri Jun 28 16:27:00 1985
Date-Received: Wed, 3-Jul-85 07:31:28 EDT
Lines: 32
Nf-ID: #N:trsvax:55200186:000:1688
Nf-From: trsvax!mikey    Jun 28 15:27:00 1985





I have a Chrysler radio in my new Omni that has AM/FM Stereo and
auto-reverse cassette.  It only has the two door speakers on it.  I
want to add a haedphone tap and possibly a power amp that I already
have.  The Radio Shack headphone adapter box will work on non-common
ground radios, but the amplifier won't.  I got the service manual for
the car, but it doesn't say anything about what is in the radio itself.
Since the system was designed for a possible option of a power amp to
be plugged in by the factory, the speaker harness obviously doesn't
have a common ground for the speakers.  There is no way to tell from
the schematic if the radio can handle a common ground.  They do warn in
the service manual against using no load on the radio.  I ohmed the
speaker returns leads but it's over 100 ohms resistance between the
channels.  This really isn't that indicative, as I THINK the the output
feeds the speaker hot side and the returns go into a fader control for
front to back.  I took the radio apart but the area I need to get to is
sandwiched between two circuit boards and I would have to start
unsoldering, which I don't want to do.  At this point I'm tempted to
just put load resistors on the radio outputs and feed it to a booster
that I already have and leave it on all the time.

What I need to know is what does the radio care about.  Can I use a
common ground?  Can I operate it with a high impedance load (ie.
headphones only)?  Any ideas at all or should I just wait for the new
SAMS photofacts?  If it weren't for the fact that I like the radio to
begin with and can't really budget a replacement now, I might be
tempted to just get a new radio.

mikey at trsvax