<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><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 class="Apple-style-span" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; line-height: 19px; ">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 href="http://www.digparty.com/w/index.php?title=Partial-response_maximum-likelihood&action=edit&redlink=1" class="new" title="Partial-response maximum-likelihood (page does not exist)" style="text-decoration: none; color: rgb(46, 110, 158); background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; background-position: initial initial; background-repeat: initial initial; ">Partial-response maximum-likelihood</a> (<a href="http://www.digparty.com/wiki/PRML" class="mw-redirect" title="PRML" style="text-decoration: none; color: rgb(46, 110, 158); background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; background-position: initial initial; background-repeat: initial initial; ">PRML</a>) data decoding technology has its first use in Ampex's <a href="http://www.digparty.com/w/index.php?title=DCRsi&action=edit&redlink=1" class="new" title="DCRsi (page does not exist)" style="text-decoration: none; color: rgb(46, 110, 158); background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; background-position: initial initial; background-repeat: initial initial; ">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 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 class="Apple-style-span" style="font-size: 14px; ">Transverse scanning transport topology as:</span></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 20px/normal Helvetica; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">• Simple and compact tape path</span></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 20px/normal Helvetica; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">• Superior performance in hostile environments</span></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 20px/normal Helvetica; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">• “Azimuth” recording</span></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 20px/normal Helvetica; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">• >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 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 href="http://www.digitrakcom.com">www.digitrakcom.com</a></div><blockquote style="border-left-color: rgb(0, 0, 0); border-left-width: 2px; border-left-style: solid; padding-left: 5px; padding-right: 0px; margin-left: 5px; margin-right: 0px; "><div style="font: normal normal normal 10pt/normal arial; ">----- Original Message -----</div><div style="font: normal normal normal 10pt/normal arial; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(228, 228, 228); background-position: initial initial; background-repeat: initial initial; "><b>From:</b><span class="Apple-converted-space"> </span><a title="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 class="MsoNormal" style="margin-top: 0px; margin-bottom: 0px; "><font color="#000000" size="3" face="Arial"></font> </p></span></font></div></div></blockquote>_______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to<span class="Apple-converted-space"> </span><a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a><br>Your subscribe, unsubscribe and digest options are here:<br><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></div></blockquote></div><br><div apple-content-edited="true"> <div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; font-size: 14px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; "><br class="Apple-interchange-newline">Ted Langdell</span></font></div><div><span class="Apple-style-span" style="font-size: 12px; ">Secretary</span></div><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Skype: <span class="Apple-tab-span" style="white-space: pre; "> </span>TedLangdell</span></font></div><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">e-mail:<span class="Apple-tab-span" style="white-space: pre; "> </span><a href="mailto:ted@quadvideotapegroup.com">ted@quadvideotapegroup.com</a></span></font></div></span></div></div></div> </div><br></body></html>