[QuadList] S-VHS

Mon Feb 27 12:58:53 CST 2012

 I'm wondering if anyone might corroborate my impression that there are
> no DVD/VHS combination decks currently being manufactured that support
> native output of S-VHS. Looking around, it seems like while S-VHS
> tapes can be read by some of the combo decks still-in-production, the
> signal is down-rezzed (terms like "quasi-playback" are used) to VHS
> levels of resolution.

Most likely only available used/refurbished as almost all new flat panels plus 
audio-video receivers and processors from Marantz and other companies no longer 
have S-VHS inputs, only composite, component and HDMI. Smaller audio-video 
companies such as NAD and ARCAM still include S-VHS inputs. 

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Sent: Mon, February 27, 2012 1:00:12 PM
Subject: QuadList Digest, Vol 44, Issue 72

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Today's Topics:

  1. Ampex Hint of the Week,    Video Levels in VR-1200 and VR-2000
      (Chill315 at aol.com)
  2. OT: is S-VHS "obsolete" in copyright law's eyes? (Walter Forsberg)
  3. Re: OT: is S-VHS "obsolete" in copyright law's eyes?
      (chill315 at aol.com)
  4. Re: OT: is S-VHS "obsolete" in copyright law's eyes?
      (John Fletcher)

----------------------------------------------------------------------

Message: 1
Date: Mon, 27 Feb 2012 09:07:42 -0500 (EST)
From: Chill315 at aol.com
To: quadlist at quadvideotapegroup.com
Subject: [QuadList] Ampex Hint of the Week,    Video Levels in VR-1200
    and VR-2000
Message-ID: <241da.31225ec5.3c7ce82e at aol.com>
Content-Type: text/plain; charset="us-ascii"

Setting video levels is an interesting problem.  What is the  philosophy 
that one should follow.  At the production facilities I worked  at, we took 
the view that the video operator did his job correctly.  That  was the heart 
of the question.  We therefore had the following  procedure.  

Set the Proc Amp to Unity.  Then use the Demod Level out to set the  video 
out of the machine.

To do this it was necessary to do the following.  

Set unity levels in the proc amp.  I used a scope with the invert and  add 
function to null out the levels at the highest gain possible.  That way  it 
was as close as possible to perfect.

The book has the alignment procedure.  Here are the following pots  numbers 
and what they do.

R-5 on the test point panel sets burst level.

R-6 on the test point panel sets video level.

R-9 on the test point panel sets the set-up level.

R-39 Board 17 sets the blanking clamp level to the same as input.

R-51 Board 13 sets the sync level.

Once we did this, we found that the quality of the video shot up.  We  were 
able to get more generations.  The reason being that we did not make  
slight changes to the video quality each pass.  Miss-set the black level by  a 
couple of IRE's on the bars and over a few passes, you either wash it out or  
darken it.  Also it was the intention to keep the dynamic range at the  
optimal point for each piece of the chain.  

The thing we found is that we rarely had to take the proc amp out of  
unity.  The times we did this was usually when we got a tape from a  station.  
They seemed to never have a set of best practices.  It was  just throw up a 
tape and push buttons.  Some even would record tapes  without bars and send 
them to us.  Try to make a silk purse out a sows ear  on those situations.

Chris Hill
WA8IGN
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Message: 2
Date: Mon, 27 Feb 2012 10:56:20 -0600
From: Walter Forsberg <walterforsberg at gmail.com>
To: QuadList at quadvideotapegroup.com
Subject: [QuadList] OT: is S-VHS "obsolete" in copyright law's eyes?
Message-ID:
    <CAO+fC9OgeGRJL0J+TSVt2HgM4+zpjXsMWS7jHCwWbWYhJxa9aw at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi All-

I'm wondering if anyone might corroborate my impression that there are no
DVD/VHS combination decks currently being manufactured that support native
output of S-VHS. Looking around, it seems like while S-VHS tapes can be
read by some of the combo decks still-in-production, the signal is
down-rezzed (terms like "quasi-playback" are used) to VHS levels of
resolution.

Thanks, in advance, for any thoughts!

Walter Forsberg
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Message: 3
Date: Mon, 27 Feb 2012 12:17:39 -0500
From: chill315 at aol.com
To: Quad List <quadlist at quadvideotapegroup.com>
Subject: Re: [QuadList] OT: is S-VHS "obsolete" in copyright law's
    eyes?
Message-ID: <46A064F0-32B6-4D11-BE93-7A792A7EB0C1 at aol.com>
Content-Type: text/plain;    charset=us-ascii

I was always under the impression that the only real advantage of S-video was on 
the TV set end.  By avoiding the chroma separation circuits in the TV you got a 
little bit better picture.  The change in the quality was not that much as far 
as I was concerned.

The quality difference between regular and S VHS to me was not that great.

Chris Hill

On Feb 27, 2012, at 11:56 AM, Walter Forsberg <walterforsberg at gmail.com> wrote:

> Hi All-
> 
> I'm wondering if anyone might corroborate my impression that there are no 
>DVD/VHS combination decks currently being manufactured that support native 
>output of S-VHS. Looking around, it seems like while S-VHS tapes can be read by 
>some of the combo decks still-in-production, the signal is down-rezzed (terms 
>like "quasi-playback" are used) to VHS levels of resolution.
> 
> Thanks, in advance, for any thoughts!
> 
> Walter Forsberg
> Please trim posts to relevant info when replying.
> 
> Change subject to reflect thread direction. Thanks.
> _______________________________________________
> 
> Send QuadList list posts to QuadList at quadvideotapegroup.com
> Your subscribe, unsubscribe and digest options are here:
>http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com
>m

------------------------------

Message: 4
Date: Mon, 27 Feb 2012 12:27:32 -0500
From: John Fletcher <jfletcher at frontiernet.net>
To: Quad List <quadlist at quadvideotapegroup.com>
Subject: Re: [QuadList] OT: is S-VHS "obsolete" in copyright law's
    eyes?
Message-ID: <1330363652.15035.3.camel at debian.basement>
Content-Type: text/plain; charset="UTF-8"

Could this be just because these DVD/VHS combo decks are aimed at the
"consumer" set who never bought into SVHS... so no need to go the extra
step to provide full SVHS playback capability?

- John

On Mon, 2012-02-27 at 10:56 -0600, Walter Forsberg wrote:
> Hi All-
> 
> 
> I'm wondering if anyone might corroborate my impression that there are
> no DVD/VHS combination decks currently being manufactured that support
> native output of S-VHS. Looking around, it seems like while S-VHS
> tapes can be read by some of the combo decks still-in-production, the
> signal is down-rezzed (terms like "quasi-playback" are used) to VHS
> levels of resolution.
> 
> 
> Thanks, in advance, for any thoughts!
> 
> 
> Walter Forsberg
> Please trim posts to relevant info when replying.
> 
> Change subject to reflect thread direction. Thanks.
> _______________________________________________
> 
> Send QuadList list posts to QuadList at quadvideotapegroup.com
> Your subscribe, unsubscribe and digest options are here:
>http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com
>m

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