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<DIV><FONT size=2>Bob:</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Thanks for the detail on the Otari system. I've uploaded
a copy of the Sony brochure for their system which used magnetic transfer as was
used with the quad duplicator. I believe their bin system also cured the
problem with the loop folds and regular tape was used for the dubs. The
brochure also shows the Sony mirror master recorder.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2><A
href="http://www.digitrakcom.com/TechDocs/SONYsprinter.pdf">http://www.digitrakcom.com/TechDocs/SONYsprinter.pdf</A></FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Don Norwood<BR>Digitrak Communications, Inc.<BR><A
href="http://www.digitrakcom.com">www.digitrakcom.com</A></FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=rabruner@aol.com href="mailto:rabruner@aol.com">rabruner@aol.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, March 10, 2010 5:33
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [QuadList] High Speed
dubbing</DIV>
<DIV><BR></DIV><FONT color=black size=2 face=arial>
<DIV><FONT color=black size=2 face=arial><FONT color=black size=2
face=arial> </DIV>
<DIV style="FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt">
<DIV style="MARGIN: 10px"
id=AOLMsgPart_5_37b2bac1-c69c-41bf-96ac-19f06d9563c5>
<DIV id=AOLMsgPart_8_37b2bac1-c69c-41bf-96ac-19f06d9563c5>
<DIV style="FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt">
<DIV id=AOLMsgPart_3_53559ff8-70ef-4a8f-9aa9-c960c5ef6fc8>
<DIV>>>Also, I didn't realize that the VHS tapes were made in this
fashion, I just figured someone had 100 vhs machines which were started with a
remote control device. I am not a movie type so I wouldn't notice if
there is much quality difference in the tapes, if any. Besides, the only tapes
I ever bought were at great "Discounts" which I bought on 44th ST. in New York
after midnight.
(HI).>></DIV></DIV></DIV></FONT></FONT></DIV></DIV></DIV>
<DIV> </DIV>
<DIV>The Otari VHS contact printers -- pictures posted by someone on here --
used industrial lasers to heat the tape up to the Curie point while the master
and the copy were held together in a vacuum shoe similar in some ways to the
guide on a two inch machine. The mass of the guide cooled the
tape quickly. The copies were very high quality, but there were
problems with the process. It depended on using CrO2 tape for both the master
and the copy, which was very expensive, more than three times the cost of
ferrichrome VHS tape. Since most of the cost of a dub is in the tape, it
made the process expensive. There were also technical problems with the
master which was a loop stored in a bin. When the loop went zipping
through the machine at high speed, the straightening of the folds in the loop
bins caused a temporary magnetic anomaly which lasted long enough to be
transferred to the dub. These looked like tape creases moving through
the image and were called "CLDs" or crease-like-distortions. They were
mostly a problem with longer masters, such as for feature length films.
These had more tape and hence tighter folds in the loop bin. Shorter
tapes, in the range of a half hour to 45 minutes, didn't usually experience
this problem. So you are not likely to have seen many contact print VHS
movies. The cost was too high, and the difficulty of getting clean transfers
mitigated against it. Bell and Howell-Columbia-Paramont -- later Rank
Video Duplicators -- the largest duplicator in the US at one time, doing
around 80 percent of the titles sold domestically, used all methods of
duplication, but the majority of their product was generated either on banks
of 7000 in-cassette duplicators or 6000 open reel 2x speed duplicators.
The Otari machines were used for industrial productions of shorter form for
premium clinents who would pay more. '100 machines' wouldn't even make a
test run for national level movie distribution in those days . . . </DIV>
<DIV> </DIV>
<DIV>Bob Bruner</DIV>
<DIV>W9TAJ<BR><BR></DIV>
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<DIV> </DIV></FONT></DIV></DIV></FONT></DIV></DIV></DIV></FONT>
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