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<DIV>Very interesting product. The thing is now you can buy a terabyte for
about $50. So that would replace the capacity of three of the
cassettes. </DIV>
<DIV> </DIV>
<DIV>Was this product used for archival or as an on-line storage unit. The
presentation talks about the airborne product line and the fixed product
line. Sounds like a military product.</DIV>
<DIV> </DIV>
<DIV>Now here is an interesting question, How does NSA or the CIA or other
agency archive all the data that they have? </DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 2/28/2011 3:10:40 A.M. Eastern Standard Time,
ted@quadvideotapegroup.com writes:</DIV>
<BLOCKQUOTE style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>
<DIV>The ASACA 1" Quad had two models, the last introed in 1977. </DIV>
<DIV><BR></DIV>
<DIV>It was not the only transverse quad machine and the application that
succeeded was a bit different.</DIV>
<DIV><BR></DIV>
<DIV>Ampex developed a 1" transverse Quad cassette system, DCRSi, which writes
digital info to tape.</DIV>
<DIV><BR></DIV>
<DIV><SPAN style="LINE-HEIGHT: 19px; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif; FONT-SIZE: 11px" class=Apple-style-span>In 1983, Ampex introduced the DCRS digital cassette
recorder, offering compact cassette storage with the equivalent of 16 digital
or 8 DDR instrumentation reels on one cassette. Also, <A style="BACKGROUND-IMAGE: none; COLOR: rgb(46,110,158); TEXT-DECORATION: none; background-origin: initial; background-clip: initial" class=new title=http://www.digparty.com/w/index.php?title=Partial-response_maximum-likelihood&action=edit&redlink=1 href="http://www.digparty.com/w/index.php?title=Partial-response_maximum-likelihood&action=edit&redlink=1">Partial-response
maximum-likelihood</A> (<A style="BACKGROUND-IMAGE: none; COLOR: rgb(46,110,158); TEXT-DECORATION: none; background-origin: initial; background-clip: initial" class=mw-redirect title=http://www.digparty.com/wiki/PRML href="http://www.digparty.com/wiki/PRML">PRML</A>) data decoding technology
has its first use in Ampex's <A style="BACKGROUND-IMAGE: none; COLOR: rgb(46,110,158); TEXT-DECORATION: none; background-origin: initial; background-clip: initial" class=new title=http://www.digparty.com/w/index.php?title=DCRsi&action=edit&redlink=1 href="http://www.digparty.com/w/index.php?title=DCRsi&action=edit&redlink=1">DCRsi</A>™
recorders. This technology is now commonly used in high performance computer
disk drives and other high density magnetic data storage devices.</SPAN></DIV>
<DIV><BR></DIV>
<DIV>Here's a link to a 1996 Ampex presentation about DCRSi and an Ampex 19mm
helical cassette digital data product that uses AST:</DIV>
<DIV><A title=http://www.thic.org/pdf/Oct96/ampex.twood.pdf href="http://www.thic.org/pdf/Oct96/ampex.twood.pdf">http://www.thic.org/pdf/Oct96/ampex.twood.pdf</A></DIV>
<DIV><BR></DIV>
<DIV>On page 19, Ampex promoted the <SPAN style="FONT-SIZE: 14px" class=Apple-style-span>Transverse scanning transport topology as:</SPAN></DIV>
<DIV>
<DIV style="MARGIN: 0px; FONT: 20px Helvetica"><FONT class=Apple-style-span size=4><SPAN style="FONT-SIZE: 14px" class=Apple-style-span>• Simple and
compact tape path</SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 20px Helvetica"><FONT class=Apple-style-span size=4><SPAN style="FONT-SIZE: 14px" class=Apple-style-span>• Superior
performance in hostile environments</SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 20px Helvetica"><FONT class=Apple-style-span size=4><SPAN style="FONT-SIZE: 14px" class=Apple-style-span>• “Azimuth”
recording</SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 20px Helvetica"><FONT class=Apple-style-span size=4><SPAN style="FONT-SIZE: 14px" class=Apple-style-span>• >3,000 hour
head life - typical</SPAN></FONT></DIV></DIV>
<DIV><BR></DIV>
<DIV>On the next page, it advises there are other benefits. and notes a pilot
tone servo for active tracking.</DIV>
<DIV><BR></DIV>
<DIV>There's an airborne DCRSi recorder on ebay with quite a few
pictures:</DIV>
<DIV style="FONT-SIZE: 9px"><A title=http://cgi.ebay.com/AMPEX-TRANSPORT-MDL-TAPE-MACHINE-CAT-1301746-01-1-DCRSI-/310298195589?pt=LH_DefaultDomain_0&hash=item483f36b685#ht_830wt_907 href="http://cgi.ebay.com/AMPEX-TRANSPORT-MDL-TAPE-MACHINE-CAT-1301746-01-1-DCRSI-/310298195589?pt=LH_DefaultDomain_0&hash=item483f36b685#ht_830wt_907">http://cgi.ebay.com/AMPEX-TRANSPORT-MDL-TAPE-MACHINE-CAT-1301746-01-1-DCRSI-/310298195589?pt=LH_DefaultDomain_0&hash=item483f36b685#ht_830wt_907</A></DIV>
<DIV><BR></DIV><BR>
<DIV>
<DIV>On Feb 27, 2011, at 6:33 PM, Don Norwood wrote:</DIV><BR class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<DIV bgcolor="#ffffff" ocsi="x">
<DIV>Hi Wayne:</DIV>
<DIV> </DIV>
<DIV>I suspect you are thinking about the ASACA machine.......</DIV>
<DIV> </DIV>
<DIV><SPAN><ASACA 1inch Quad.jpg></SPAN></DIV>
<DIV> </DIV>
<DIV>Don Norwood<BR>Digitrak Communications, Inc.<BR><A title=http://www.digitrakcom.com/ href="http://www.digitrakcom.com/">www.digitrakcom.com</A></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(0,0,0) 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message -----</DIV>
<DIV style="BACKGROUND-COLOR: rgb(228,228,228); FONT: 10pt arial; background-origin: initial; background-clip: initial"><B>From:</B><SPAN class=Apple-converted-space> </SPAN><A title=mailto:wayne.watson@sait.ca href="mailto:wayne.watson@sait.ca">Wayne
Watson</A></DIV>
<DIV><BR></DIV>
<DIV dir=ltr><FONT color=#000000 size=2 face=Tahoma>This post jogged
a very foggy old memory. In about 1973 or 74 at NAB was there a one inch
quad shown by an Asian manufacturer? My recall was that it had a head that
looked like a very small Ampex quad. When I went by the both I was
surprised to see it, however there was nobody there at that
time that could speak enough English to tell anything about
it.</FONT></DIV>
<DIV dir=ltr><FONT size=2 face=tahoma>Was there ever such a recorder
was it a bad dream?</FONT></DIV>
<DIV dir=ltr><FONT size=2 face=tahoma></FONT> </DIV>
<DIV>
<DIV><FONT size=2 face=Tahoma><SPAN style="FONT-FAMILY: Arial, sans-serif; COLOR: navy; FONT-SIZE: 10pt"></SPAN><SPAN style="COLOR: navy">
<DIV style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><I><SPAN style="FONT-FAMILY: Arial, sans-serif; COLOR: navy; FONT-SIZE: 10pt">Wayne
Watson</SPAN></I><I><SPAN style="COLOR: navy"></SPAN></I></DIV>
<P style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px" class=MsoNormal><FONT color=#000000 size=3 face=Arial></FONT> </P></SPAN></FONT></DIV></DIV></BLOCKQUOTE>_______________________________________________<BR>Please
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<DIV><FONT class=Apple-style-span size=3><SPAN style="FONT-SIZE: 12px" class=Apple-style-span><BR class=Apple-interchange-newline>Ted
Langdell</SPAN></FONT></DIV>
<DIV><SPAN style="FONT-SIZE: 12px" class=Apple-style-span>Secretary</SPAN></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN style="FONT-SIZE: 12px" class=Apple-style-span>Skype: <SPAN style="WHITE-SPACE: pre" class=Apple-tab-span> </SPAN>TedLangdell</SPAN></FONT></DIV>
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