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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It lives!<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'>Diagnosis: Edge Damage on the <st1:City
w:st="on"><st1:place w:st="on">Fuji</st1:place></st1:City> tape.<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'>I had the staff bake three different tape
stocks: Ampex, Scotch and VTC.<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'>The Ampex locked right up and looked
beautiful. So did the Scotch. VTC: Okay, but not as beautiful as
the others. The RF is lower, and I can see some lines in the pic.
Plus, the VTC stock flakes even after baking three times.<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'>So I mount the <st1:City w:st="on"><st1:place
w:st="on">Fuji</st1:place></st1:City> tape. And it won’t play
back. I look, and indeed there is edge damage! This is the tape
that the staff swore up and down will ALWAYS play back. Well, it
don’t. And I took it to the credits, where I had never played it,
and it still doesn’t work.<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'>I checked the tape path and didn’t
find anything out of the ordinary. Everything looks nice and straight
with no curling on the Scotch and Ampex stock. <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'>Thanks, especially to Chris Hill for his
help!<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'>Oh yeah, the heads wouldn’t spin the
other day because one of the cards was loose and tripped the interlock. :-o<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'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoAutoSig><font size=3 color=gray face="Brush Script MT"><span
style='font-size:12.0pt;font-family:"Brush Script MT";color:gray'>Fred Kovach<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Broadcast Technician<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<p><font size=2 color=blue face=Arial><span style='font-size:10.0pt;font-family:
Arial;color:blue'>417-848-8381<o:p></o:p></span></font></p>
</div>
</div>
<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>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<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
[mailto:quadlist-bounces@quadvideotapegroup.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>chill315@aol.com<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, November 11, 2013
5:59 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Quad List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [QuadList] TR-600
Control Track/Capstan Servo Issues</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Interesting problem. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> Did you demagnetize the control track head after checking
continuity? <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Is there edge damage on the problem tape?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> Fugi tape uses a stiffer base layer and is renown
for being easy to damage. If there is a little scalloping on the lower
edge, that would be an issue. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>What does the control track playback waveform and level look like?
I see that you tell us the level changes a couple of minutes into the
program. But does the control track show the saturation bump?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Comments. Using capstan speed override shows that all other parts
of the machine are working. The unlock every few seconds is normal since
there is no control of the capstan. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>This may be a tape for an AVR-1. The machine that can play anything.<br>
<br>
Chris Hill<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
On Nov 10, 2013, at 9:38 PM, "Fred Kovach" <<a
href="mailto:fkovach@sbcglobal.net">fkovach@sbcglobal.net</a>> wrote:<o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<div><u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"><u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName">
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'><!--[if gte mso 9]><xml>
<u1:shapedefaults u2:ext="edit" spidmax="1026"/>
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</xml><![endif]-->Note:</span></font></b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> I sent this originally on October
31, and it apparently never posted (I wondered why I never received any
replies!!!) </span></font><font size=2 face=Wingdings><span
style='font-size:10.0pt;font-family:Wingdings'>J</span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have since added a couple of notes of what Ibve
done. Any advice that you can give me would be greatly appreciated.<u1:p></u1:p></span></font><o:p></o:p></p>
<div style='border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 1.0pt 0in'>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am working on a RCA TR-600A thatbs having a tracking
issue. This has been an ongoing problem for about three months; and my
usual source of information is at a loss. Hebs been very helpful and gone
out of the way to help me; but I think it is time for me to check with you guys
on this.<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>It is not locking up to control track on what was our most
reliable playback tape (<st1:place u4:st="on"><st1:city u4:st="on"><st1:City
w:st="on"><st1:place w:st="on">FUJI</st1:city></st1:place></st1:place></st1:City>
tape stock). After some amount of troubleshooting on the C18 CT Amp card,
I found two bad chips: U1 and U7 that was basically switching between the pb
and rec CTL heads. So the machine was in PB mode, but half the card
thought it was in record! I also replaced some capacitors on that card,
After that, it would still not lock up on the FUJI tape, but would lock up to a
VTC tape stock that had a higher level CT track on it. Actually, it
wouldnbt lock at the beginning of the tape where the CT was lower level, but
apparently whoever recorded in, turned up the record current about 2 or 3
minutes in!<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have done the following:<u1:p></u1:p></span></font><o:p></o:p></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked continuity from the CTL
head to the C18 card. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked grounds/shields on the
same path. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked power supply voltages
at the power supply and the card. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Replaced a flaky R307 on the
power supply, which was throwing the +12 VDC supply all over the place
whenever I even thought of touching it! <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Cleaned the power supply
interface molex connectors with contact cleaner. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked grounds on the back
plane. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked wirewrap connections on
the back plane. Especially those that I re-did in Summer 2012 when I
took out the Auto Editor (AE600) on the advice of my friend. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Thoroughly cleaned the path and
checked out the problem with two other spare headwheel assbys we have on
hand. However, the HW assby that I had in there has the best
performance. My friend found that it had less than 1 micron wear; so
I put it back in. Also adjusted tip penetration and scalloping. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checked the inputs from our
sync generator. </span></font> <o:p></o:p></li>
<u1:p></u1:p>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Varying the capstan speed from
the control panel, will bring it pretty close to locking up, but of
course, you have an b occasionalb skip every two or three seconds. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Had my friend check a boatload
of cards in his machine, all of which worked, except the aforementioned
C18 card, which in spite of my best efforts apparently still had issues
(see below). <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Swapped C18 cards with another
known to be good after my friend found that my C18 card didnbt work in his
machine. After the new card, the VTC tape would lock up a little
earlier in the program. So that was progress. J But
still no lock on Old Reliable Fuji tape. Also, Ibve had to abandon
the VTC tape, as it was clogging up the heads a lot; even after baking
it. Donbt want any more trouble than I have already! ;) <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Varied the three pots on the
C19 card (capstan balance, symmetry and level, I think) and one on the C20
card. All on the advice of my friend, to see if they helped.
We got perhaps marginal improvement. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Therebs probably a few other
things that Ibve forgotten. If necessary, Ibll post them as I
remember them. But I did write my work down, so this ought to be
most of them. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I went through the capstan
servo alignment section of the manual (ecept for the record functions,
since this machinebs record doesnbt work), and found it needed some minor
adjustments. However, nothing major. I did find that the Color
Framer card was missing and in itbs place was the Guide PA card!!
However, Ibm told that the Color Framer is only used for editing and is
not necessary for playback. The Guide PA card works just fine in its
proper place. But it didnbt solve the problem. And I should
note that since apparently these two cards have been out of place for some
time, that the machine would have been working fine with them out of
place. If this makes senseb&.</span></font> <o:p></o:p></li>
</ol>
<u1:p></u1:p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am thinking of doing the following the next time Ibm
there, which might be tomorrow (Monday):<u1:p></u1:p></span></font><o:p></o:p></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l2 level1 lfo6'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Digging into the backplane a
little deeper and confirming all the mods I did when I removed the
AE600. Ibve already done this thoroughly once, but my friend thinks
the problem might be there; so Ibll do it again. <u1:p></u1:p></span></font><o:p></o:p></li>
<li class=MsoNormal style='mso-list:l2 level1 lfo6'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checking the levels coming off
the CT heads of the three different headwheel assbys to see if I can find
any kind of pattern for this.</span></font> <o:p></o:p></li>
<u1:p></u1:p>
<li class=MsoNormal style='mso-list:l2 level1 lfo6'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Checking the circuitry
surrounding the CT Phase adjustment because when it does playback the VTC
tape properly, I have to turn it fully clockwise for it to lock up. <b><span
style='font-weight:bold'>Is there a way to get it so that this control
works closer to the center of the pot?</span></b></span></font> <o:p></o:p></li>
</ol>
<u1:p></u1:p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I appreciate any help you can give me on this. I may
be able to take some pics or video of waveforms if it would help.<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks so much!<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Fred<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><st1:personname u4:st="on"><font size=3 color=gray
face="Brush Script MT"><span style='font-size:12.0pt;font-family:"Brush Script MT";
color:gray'>Fred Kovach</span></font></st1:personname><o:p></o:p></p>
<u1:p></u1:p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Broadcast Technician<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>417-848-8381<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><u1:p> </u1:p><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><u1:p> </u1:p><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><u1:p> </u1:p><o:p></o:p></span></font></p>
</div>
</blockquote>
</u1:smarttagtype></u1:smarttagtype></u1:smarttagtype>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>______________________________________________<br>
Please trim posts to relevant info when replying.<br>
<br>
Change subject to reflect thread direction. Thanks.<br>
_______________________________________________<br>
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