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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Don,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>RCA had a rather ingenious way of
threading the tape into the guide on a TCR100. As the tape was ready to go
into the guide, they spun the head very briefly which aided in properly seating
the tape. This was quickly followed by a short burst of the electronic brake,
which provided backspin on the head just enough to make it stop. I had a
machine that started mis-threading on a regular basis. Turned out the
electronic brake was being activated too long and kicking the tape back out of
the guide. Had to videotape the process then analyze it in slow motion to
figure that one out.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:PersonName w:st="on"><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Steve
Walton</span></font></st1:PersonName><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
quadlist-bounces@quadvideotapegroup.com
[mailto:quadlist-bounces@quadvideotapegroup.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Don Norwood<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, February 03, 2010
10:17 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Quad List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [<st1:PersonName
w:st="on">QuadList</st1:PersonName>] TCR-100 (was 1" Machine glue)</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><em><i><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>----- Original Message ----- </span></font></i></em><o:p></o:p></p>
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<p class=MsoNormal><em><i><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>From: "Dennis Degan" <</span></font></i></em><a
href="mailto:DennyD1@verizon.net"><em><i><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>DennyD1@verizon.net</span></font></i></em></a><em><i><font
size=2 face="Times New Roman"><span style='font-size:10.0pt'>></span></font></i></em><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
</span></font><em><i><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>On Feb 2, 2010, at 5:44 PM, Don Norwood wrote:</span></font></i></em><i><font
size=2><span style='font-size:10.0pt;font-style:italic'><br>
<br>
<em><i><font face="Times New Roman"> > I never had more than a casual
look at the TCR-100, and didn't </font></i></em><br>
<em><i><font face="Times New Roman">realize that it used the same head as the
other machines. Threading </font></i></em><br>
<em><i><font face="Times New Roman">must have been quite a trick. How did they
do that? </font></i></em><br>
<br>
<em><i><font face="Times New Roman">I offer:</font></i></em><br>
<br>
<em><i><font face="Times New Roman">Unlike the Ampex machine's cartridges,
RCA's carts could open in a way </font></i></em><br>
<em><i><font face="Times New Roman">that exposed the tape at 3 sides.
Aluminum doors that wrapped around </font></i></em><br>
<em><i><font face="Times New Roman">the cartridge would open, rotating on their
spring-loaded hinges 90 </font></i></em><br>
<em><i><font face="Times New Roman">degrees. This allowed a pair of pins
to reach into the cart and pull </font></i></em><br>
<em><i><font face="Times New Roman">the tape out. The pins were each
mounted on a machined polished track </font></i></em><br>
<em><i><font face="Times New Roman">driven by a bicycle chain. Each
travelled a distance of about 2 feet </font></i></em><br>
<em><i><font face="Times New Roman">diagonally in order to span the
vertically-mounted width of the </font></i></em><br>
<em><i><font face="Times New Roman">transport. Though nowhere near as
fast as the Ampex machine, the </font></i></em><br>
<em><i><font face="Times New Roman">movement of those pins was fast enough to
be dangerous if your hand was </font></i></em><br>
<em><i><font face="Times New Roman">in the wrong place at the wrong time.</font></i></em><br>
<em><i><font face="Times New Roman">The entire assembly would then move
horizontally to thread the tape </font></i></em><br>
<em><i><font face="Times New Roman">across the erase, audio, quad video heads,
capstan and guides, aided by </font></i></em><br>
<em><i><font face="Times New Roman">guide blocks, which was followed by a
slight retraction of the guide </font></i></em><br>
<em><i><font face="Times New Roman">pins to avoid tape motion
interference. The action was reversed to </font></i></em><br>
<em><i><font face="Times New Roman">return the tape loop back into the
cartridge.</font></i></em><br>
<br>
<em><i><font face="Times New Roman">Dennis Degan, Video
Editor-Consultant-Knowledge Bank</font></i></em><br>
<em><i><font face="Times New Roman"> NBC Today Show, <st1:State w:st="on"><st1:place
w:st="on">New York</st1:place></st1:State></font></i></em></span></font></i><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Dennis:<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>The part I was unclear on was specifically the tape threading into
the head assembly. Ampex's retractable guide made it easy, but I had
not thought about RCA using a standard head. Were the guide blocks you
mentioned attached to the head or to the TCR frame? The Youtube video
isn't quite good enough to see the detail. I guess I need to go to <st1:City
w:st="on"><st1:place w:st="on">Boston</st1:place></st1:City> and see Paul's
machine in action!<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Don<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Don Norwood<br>
<a href="http://www.digitrakcom.com">www.digitrakcom.com</a></span></font><font
size=2><span style='font-size:10.0pt'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
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