[QuadList] QuadList Digest, Vol 36, Issue 12

Sun Jun 5 11:59:26 CDT 2011

The video head assy. looks like a Ampex MK-X has all of the marking.  I can not 
remember but I think The machine main frame is Shibaden with  signal system 
electronics made by Denon.

Merlin Eng. made a unit called "VISA"  Vertical interval stereo audio, was 
design for the US Air Force testing at Edwards AFB in Calif. First units were 
use to view and collect data in flight. The data and view object was at the same 
time, so engineers could see the results and view the fault.  Later we use 
basic   design to make a unit for commercial stereo audio on quads, much less 
expensive that the modes for the ACR-25's for MTV, as you just needed one unit 
to make the recording  or playback.  At that time the one inch machine were just 
starting to come into play Ampex, Sony and Bosch, and they had dual audio.
Ken Zin

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From: "quadlist-request at quadvideotapegroup.com" 
<quadlist-request at quadvideotapegroup.com>
To: quadlist at quadvideotapegroup.com
Sent: Sat, June 4, 2011 9:32:17 PM
Subject: QuadList Digest, Vol 36, Issue 12

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Today's Topics:

   1. Test (Ted Langdell)
   2. Re: digital audio with quad--Nippon Columbia apparently    used
      a ShibadenSV-7000 Quad (Ted Langdell)

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

Message: 1
Date: Sat, 4 Jun 2011 21:21:05 -0700
From: Ted Langdell <ted at quadvideotapegroup.com>
To: Quad List <QuadList at quadvideotapegroup.com>
Subject: [QuadList] Test
Message-ID:
    <CD176687-BEF7-48C7-BE4F-AD2282C8975B at quadvideotapegroup.com>
Content-Type: text/plain; charset="us-ascii"; Format="flowed"

Ted Langdell
Secretary

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Message: 2
Date: Sat, 4 Jun 2011 21:32:11 -0700
From: Ted Langdell <ted at quadvideotapegroup.com>
To: Quad List <quadlist at quadvideotapegroup.com>
Subject: Re: [QuadList] digital audio with quad--Nippon Columbia
    apparently    used a ShibadenSV-7000 Quad
Message-ID:
    <9AF5790C-2BD8-4D8C-AC6C-B628B7C81F4C at quadvideotapegroup.com>
Content-Type: text/plain; charset="us-ascii"; Format="flowed";
    DelSp="yes"

Right company... wrong machine, though...

On Jun 4, 2011, at 11:05 AM, LARRY wrote:

Anyone ever see this?

> LE Odham
> Engr-Tech
> TAMIS Archive
> Knoxville,Tenn.
> <vr1000.jpg>

Not sure whether anyone saw my post regarding the use of Quad to  
record digital audio:

And the answer is:
Denon, a subsidary of Nippon Columbia in Japan.

Details are found here:
http://www.aes.org/aeshc/pdf/fine_dawn-of-digital.pdf

In 1969-1971, Denon leased an NHK stereo PCM recorder and conducted  
numerous
test recordings. Retired Denon engineer Dr. TakeakiAnazawa told the  
author: 'We got a
lot of ideas about improvement of (the) system from these  
experiences." Denon's tests
also resulted in two commercial albums, the first commercial use of  
PCM digital technology.
Indeed, the first commercial digital recording was Nippon Columbia  
NCB-7003,
"Something" by Steve Marcus, released January 1971. The only other  
commercial release
to come out of these early Denon/NHK recordings was Nippon Columbia  
NCC-8004,
"The World of SutomuYamashita," according to Anazawa."

Satisfied that PCM digital was an improvement over analog tape, Denon  
engineers
set out to develop their own VTR-based system. Their goals were  
improved audio quality
and multi-track recording capability, which then made the system  
viable in most commercial
recording settings of the 1970s.

In 1972, Denon unveiled the DN-023R, an 8-channel system featuring 13- 
bit resolution and a sampling rate of 47.25kHz. The system used a  
Hitachi (then called Shiba Electronics) 4-head open-reel broadcast VTR  
as its
storage format.

(TL asks:  Would this have been a ShibadenSV-7000, seen here  
transformed into a Merlin ME-68 on LabGuy's website?
http://www.labguysworld.com/Merlin_ME68.htm)

Here's a photo  of the Denon machine from:
http://www.sempre-audio.at/images/Report/100_Jahre_Denon/Denon_DN-023R_PCM-Recorder_670.jpg

Looks line an SV-7000 to me.)

Anazawa noted: "We used the low-band mode of the VTR, for black and  
white (video). The reasons were stronger (performance) than color mode  
for tape dropout and less cost." Anazawa said, with the DN-023R, "we  
could edit music recordings and cut (LP) discs using advanced  
(preview) head" to control lathe automation.
Denon deployed the DN-023R system immediately and used it to make  
commercial release
recordings throughout the 1970s.

There's a Billboard magazine article with pictures here:
http://books.google.com/books?id=fSQEAAAAMBAJ&pg=PT31&lpg=PT31&dq=Denon,+digital+audio,+2%22+Quad&source=bl&ots=UNjJuD5cy8&sig=cZ4Cep2qnya9iyqz_KWY26Tdk2U&hl=en&ei=CRTpTZfwDJL0swOyg4T3DQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCUQ6AEwAQ#v

=onepage&q&f=false

More can be found in the AES Journal, Volume 21 Number 7 pp. 535-541;  
September 1973.

Ded

Ted Langdell
Secretary

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