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From: bwhite@oucsace.cs.ohiou.edu (Bill White )
Newsgroups: sci.electronics
Subject: Making a mono VCR into stereo?
Message-ID: <1679@oucsace.cs.OHIOU.EDU>
Date: 8 Aug 90 04:44:52 GMT
Sender: bwhite@oucsace.cs.OHIOU.EDU
Organization: Ohio U, home of the mighty Hocking River!
Lines: 30


	Several years ago I bought a brand new four-head Panasonic PV-1535K
VHS VCR.  It has lasted me without a hitch since then, barring occasional
needed cleaning and such, and one annoying problem (which I'll get to in
a moment).  However, it isn't stereo, which isn't the end of the world,
but since I have it hooked up to a component audio system, it seems a
waste.
	If I understand things correctly, the second audio track is kept
on the control track, and can be read by the control head.  If this is
correct, wouldn't it be possible to tap off the control head, feed a
second line into a decoder, and get stereo output?  I'm not asking if it
is _easy_, just possible (I have lots of free time these days to play
around with stuff like this).
	Also, how difficult would it be to reverse this process, i.e.,
set up some way to grab the second audio track, process it simultaneously
with the first, and stick it onto the control head without messing up the
entire VCR.
	I already know the modification to get the stereo signal from the
RF input; that's exceedingly simple.

	Oh yes, the annoying problem: the audio buzzes strongly on signals
with a bright white or with saturated colors.  I don't see any obvious
adjustments, and RF / IF electronics isn't my field of choice.  Any
suggestions, besides scrapping the demodulator?


|   Bill White			Internet: bwhite@oucsace.cs.ohiou.edu	|
|	HILLYER'S PROGRESSIVE LAW OF MISREPRESENTATION:			|
|		Fool me once, shame on you; fool me twice, shame 	|
|		on me; fool me thrice and I'll blow your head off.	|