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Sounds like it resembles the way a high band recording plays in low
band mode. Is the recording possibly super high band?<br>
<br>
On 8/1/2011 5:11 PM, lee williams wrote:
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<div>Hello Larry, </div>
<div> </div>
<div>Sorry but not the problem, </div>
<div> </div>
<div>The closest thing I can describe the effect is white
streaks with analog snow in them trailing out like a
comet tail from the trailing edge of anything white in
the picture. </div>
<div> </div>
<div>No digital blocks, Not a head clog. <br>
</div>
<div>Thanks. </div>
<div> </div>
<div>Lee </div>
<div> </div>
<div><br>
--- On <b>Sun, 7/31/11, LARRY <i><a class="moz-txt-link-rfc2396E" href="mailto:leodham@centurylink.net"><leodham@centurylink.net></a></i></b>
wrote:<br>
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From: LARRY <a class="moz-txt-link-rfc2396E" href="mailto:leodham@centurylink.net"><leodham@centurylink.net></a><br>
Subject: Re: [QuadList] <span>AVR</span> 3 heads
question<br>
To: "Quad List" <a class="moz-txt-link-rfc2396E" href="mailto:quadlist@quadvideotapegroup.com"><quadlist@quadvideotapegroup.com></a><br>
Date: Sunday, July 31, 2011, 6:58 AM<br>
<br>
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<div>Hello Lee,</div>
<div> </div>
<div>I have been following some of the
back-and-fourth e-mails on your tape playback
trouble.</div>
<div>Here is my two cents worth:</div>
<div> </div>
<div> I have experienced this problem before.</div>
<div>The video is tearing in what looks to be square
blocks? right??</div>
<div>I have encountered that very same effect here
on a VR-1200b. It was caused here by the playback
equalization. A good way to verify if this is the
problem is to go to manual equalization, and turn
down(reduce) the EQ one channel at a time. If you
see an improvement, then stop the machine,
unthread the tape, and look with a magnifier at
the drum surface behind each head tip(trailing
surface). You may find a small build-up of
black-looking stuff behind one, or all, of the
head tips on the drum edge surface itself. </div>
<div>This build-up increases the diameter of the
head drum just enough to decrease tip penetration
at the head.</div>
<div>Usual cleaning of the tips will not remove this
buildup. Alcohol and a fingernail will.
CAREFULLY!!</div>
<div> </div>
<div> OK, hope this helps,</div>
<div>larry<br>
----- Original Message -----<br>
From: "lee williams"
<a class="moz-txt-link-rfc2396E" href="mailto:lasvegastvengineer@yahoo.com"><lasvegastvengineer@yahoo.com></a><br>
To: "Quad List"
<a class="moz-txt-link-rfc2396E" href="mailto:quadlist@quadvideotapegroup.com"><quadlist@quadvideotapegroup.com></a><br>
Sent: Sunday, July 31, 2011 12:24:33 AM<br>
Subject: Re: [QuadList] AVR 3 heads question<br>
<br>
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<div>Hello, </div>
<div>Answers below questions. </div>
<div> </div>
<div><br>
<br>
--- On <b>Sat, 7/30/11, <a class="moz-txt-link-abbreviated" href="mailto:Chill315@aol.com">Chill315@aol.com</a>
<i><a class="moz-txt-link-rfc2396E" href="mailto:Chill315@aol.com"><Chill315@aol.com></a></i></b>
wrote:<br>
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rgb(16,16,255) 2px solid; PADDING-LEFT:
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From: <a class="moz-txt-link-abbreviated" href="mailto:Chill315@aol.com">Chill315@aol.com</a>
<a class="moz-txt-link-rfc2396E" href="mailto:Chill315@aol.com"><Chill315@aol.com></a><br>
Subject: Re: [QuadList] AVR 3 heads
question<br>
To: <a class="moz-txt-link-abbreviated" href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</a><br>
Date: Saturday, July 30, 2011, 9:38 AM<br>
<br>
<div id="yiv981461483"><font
id="yiv981461483role_document"
color="#000000" face="Arial" size="2">
<div>Lee</div>
<div> </div>
<div>How does the RF envelope look on
the scope?</div>
<div>No Scope - I can tell I have
plenty of RF with my tracking
adjustment. </div>
<div> </div>
<div> </div>
<div>How is Vertical lining up with
house?</div>
<div>AVR3 is on internal generator. No
difference if I hook up a black
source to the machines. </div>
<div> </div>
<div> </div>
<div>Do you have an alignment tape?
If so, how does it play and where is
the tracking knob?</div>
<div>Alignment and known good tapes
play fine. </div>
<div>Client has several thousand tapes
made in the early 80's (probably on
a VR2000) </div>
<div> </div>
<div>Are you using manual or auto
tracking?</div>
<div>Manual normally. No difference
in auto. </div>
<div> </div>
<div>30 lines of black may be that you
are one or two head passes off in
the vertical realm. The tearing may
be due to the fact that you can not
get the head centered on the track
perfectly. </div>
<div> </div>
<div>The head assemblies are made so
good that they meet SMPTE
specifications with in a few hairs.
This is to create interchangeability
between machines. </div>
<div> </div>
<div>I would not touch the heads in
any way as you will destroy the
interchange. It is a critical
factor. If you saw the recent slide
show on here, you see the great deal
of care taken to make a head.</div>
<div> </div>
<div>Now the tape you have may have
been done in a non standard method.
That is why all the questions. </div>
<div> </div>
<div>I always assume that the tape was
poorly made. Many operations did
not do best practices and thus there
is a lot of poorly made tapes. </div>
<div> </div>
<div>I know it's the tape that is off.
(several thousand of them) </div>
<div>Now how do I get them transferred
short of sending in the weak head to
the rebuilder and have him duplicate
the deviation were the head is off
of true? </div>
<div> </div>
<div>Chris Hill</div>
<div>WA8<span>IGN</span></div>
<div> </div>
<div>
<div>In a message dated 7/30/2011
11:56:38 A.M. Eastern Daylight
Time, <a class="moz-txt-link-abbreviated" href="mailto:lasvegastvengineer@yahoo.com">lasvegastvengineer@yahoo.com</a>
writes:</div>
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Hay all, <br>
Have a good one here ???
<br>
<br>
AVR3 Mark XV heads. <br>
<br>
Have some 2" tape that
when you try to pull it
through the machine will
will give you something
that looks like video
tearing in the whites
and slow horizontal
jitter. <br>
<br>
If I slam the tracking
all the way down, I get
a very clean picture,
but about 30 lines of
black overhead on the
screen. <br>
<br>
I see this on all my
new(er) heads I get from
both Aheadtek and
VideoMagnetics. <br>
<br>
I have 1 very warn out
head (supplier unknown)
that will lock to these
tapes<br>
<br>
Has anybody seen this
before and is there a
way this heads set up
can be duplicated? <br>
<br>
Thanks <br>
<br>
Lee <br>
<br>
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<pre class="moz-signature" cols="72">--
Guy Spiller
email: <a class="moz-txt-link-abbreviated" href="mailto:quadruplex@verizon.net">quadruplex@verizon.net</a>
phone: (804) 379-2050
website: <a class="moz-txt-link-abbreviated" href="http://www.GuySpiller.com">www.GuySpiller.com</a>
Midlothian, VA</pre>
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