<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>I was scratching my head about this, too. </div><div><br></div><div>Would the adjustment of the playback machine's tracking head allow you to center on just ONE of the 5-mil tracks enough that the FM discriminator would lock onto the stronger signal, much like an FM receiver does when faced with two co-channel stations?</div><div><br></div><div>Ted</div><br><div><div>On Feb 25, 2011, at 3:19 PM, Don Norwood wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>I must be missing something. The purpose of the octaplex system was to record two different video signals simultaneously. The tracks are 5-mil with a 45 degree displacment on the drum between channels. So a 10 mil head would certainly cross-track them, but in addition to the tracking errors, you would have 2 different signals "on top" of each other. I'm still not understanding how you recovered that, or what the purpose was if the octaplex was recording the same thing on both tracks.<br><br>Don Norwood<br>Digitrak Communications, Inc.<br><a href="http://www.digitrakcom.com">www.digitrakcom.com</a><br><br><br>----- Original Message ----- From: <bill.spencer@northstarstudios.tv><br>To: <dwnorwood@embarqmail.com>; <quadlist@quadvideotapegroup.com><br>Sent: Friday, February 25, 2011 4:43 PM<br>Subject: RE: [QuadList] RCA Models<br><br><br>No, every other head pass was displaced by a few microseconds and there<br>were twice as many, but within the 10 mil head it picked up all and the<br>TBC lined them all up. The machine was one owned by the production<br>people at National Life/Opryland/Gaylord/TNN/CBS Cable/MTV Networks, but<br>I don't know what the disposition of it was during all the acquisitions.<br>There are some old-timers still in town that might know what happened to<br>it.<br><br>I remember that Sony tried something similar in early Betacam where the<br>camcorder had a drum half the size and recorded a track in two<br>revolutions, actually I think all the camcorders worked that way after<br>the BVV-5.<br><br>Bill Spencer<br>NorthStar Studios, Inc.<br>3201 Dickerson Pike<br>Nashville, TN 37207<br>(615) 650-6610<br>CP (615) 445-5616<br><br>-----Original Message-----<br>From: quadlist-bounces@quadvideotapegroup.com<br>[mailto:quadlist-bounces@quadvideotapegroup.com] On Behalf Of Don<br>Norwood<br>Sent: Friday, February 25, 2011 3:06 PM<br>To: Quad List<br>Subject: Re: [QuadList] RCA Models<br><br>Hi Bill......<br><br>So are you saying that you used a 5-mil head and recovered two different<br><br>programs from the tape?<br><br>Don<br><br>----- Original Message ----- From: <bill.spencer@northstarstudios.tv><br>To: <quadlist@quadvideotapegroup.com><br>Sent: Friday, February 25, 2011 11:37 AM<br>Subject: Re: [QuadList] RCA Models<br><br><br>I have dubbed some tapes from a 10 and the head was definitely an<br>octoplex<br>as there was differential timing from one set of heads to the other.<br>The<br>good news is that the digital TBC in the AVR-2 was able to correct it<br>and a<br>previously thought 'lost' piece of material is now safe on a new digital<br><br>format.<br><br>Bill Spencer<br>RF Engineering Supervisor<br>(615) 650-6610<br>(615) 445-5616 CP<br><br>________________________________<br><br>From: quadlist-bounces@quadvideotapegroup.com on behalf of<br>Chill315@aol.com<br>Sent: Fri 2/25/2011 9:19 AM<br>To: quadlist@quadvideotapegroup.com<br>Subject: Re: [QuadList] RCA Models<br><br><br>David<br><br>I have seen the portable one displayed. It was a military unit that was<br><br>sold to the public. I was told somewhere that the original military one<br>was<br>a Octo-plex unit. I have vague memories of someone previous mentioning<br>the<br>model and working with it. So we have to assume that it was sold.<br><br>Any way this has been an interesting discussion.<br><br>Chris Hill<br><br><br><br><br><br><br>------------------------------------------------------------------------<br>--------<br><br><br><blockquote type="cite">_______________________________________________<br></blockquote><blockquote type="cite">Please trim posts to relevant info when replying!<br></blockquote><blockquote type="cite">Send QuadList list posts to QuadList@quadvideotapegroup.com<br></blockquote><blockquote type="cite">Your subscribe, unsubscribe and digest options are here:<br></blockquote><blockquote type="cite"><br></blockquote>http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideota<br>pegroup.com<br><br><br>_______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to QuadList@quadvideotapegroup.com<br>Your subscribe, unsubscribe and digest options are here:<br>http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideota<br>pegroup.com <br><br>_______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to QuadList@quadvideotapegroup.com<br>Your subscribe, unsubscribe and digest options are here:<br>http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com<br></div></blockquote></div><br><div apple-content-edited="true"> <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-align: auto; 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: 0; "><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 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 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></span></div></span></div></span> </div><br></body></html>