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<DIV>Hi Ted:</DIV>
<DIV> </DIV>
<DIV>I would expect it to look like playing a 7.5 ips recording with a 10-mil
head. Yes, it does lock, but the result is not good due to the cross
tracking.</DIV>
<DIV> </DIV>
<DIV>Don</DIV></DIV>
<BLOCKQUOTE
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=ted@quadvideotapegroup.com
href="mailto:ted@quadvideotapegroup.com">Ted Langdell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=dwnorwood@embarqmail.com
href="mailto:dwnorwood@embarqmail.com">Don Norwood</A> ; <A
title=quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">Quad List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 25, 2011 6:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [QuadList] RCA Models</DIV>
<DIV><BR></DIV>
<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>
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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>
<DIV><FONT class=Apple-style-span size=3><SPAN style="FONT-SIZE: 12px"
class=Apple-style-span>e-mail:<SPAN style="WHITE-SPACE: pre"
class=Apple-tab-span> </SPAN><A
href="mailto:ted@quadvideotapegroup.com">ted@quadvideotapegroup.com</A></SPAN></FONT></DIV></SPAN></DIV></SPAN></DIV></SPAN></DIV></SPAN></DIV><BR></BLOCKQUOTE></BODY></HTML>