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From: uhclem@trsvax
Newsgroups: net.video
Subject: Re: counters on VCRS
Message-ID: <58300031@trsvax>
Date: Mon, 1-Jul-85 10:48:00 EDT
Article-I.D.: trsvax.58300031
Posted: Mon Jul  1 10:48:00 1985
Date-Received: Thu, 4-Jul-85 00:36:46 EDT
References: <433@zinfandel.UUCP>
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Nf-ID: #R:zinfandel.UUCP:-43300:trsvax:58300031:000:1015
Nf-From: trsvax!uhclem    Jul  1 09:48:00 1985


>... spool rpms change.  *Real* VCRs, like the Sony SL-2700, run
>the tape counter off the signals recorded on the tape.  The tape
>counter reads in hours/minutes/seconds, and is *correct*.  I doubt
>if any VHS machines do this, since the tape has to come off the
>head for fast-wind, and you couldn't pick up the timing signals.

My VHS Magnavox (Phillips) displays accurate time remaining.  They
do it the same way my Pioneer CT-9R cassette deck does it:  They
calculate the amount of tape left on the supply reel by the rotation
rates of the supply vs. take-up reel.  The VCR only gives it to you in
:05 minute intervals, but the cassette deck has it down the the second
and both are pretty close.  You have to tell the unit when you are using
T-160 tapes so that it can adjust the calculation, but it needed to
know anyway so it could adjust tape tension. 

						
						"Thank you, Uh Clem."
						Frank Durda IV
						@