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<DIV>Lee</DIV>
<DIV> </DIV>
<DIV>How does the RF envelope look on the scope?</DIV>
<DIV> </DIV>
<DIV>How is Vertical lining up with house?</DIV>
<DIV> </DIV>
<DIV>Do you have an alignment tape? If so, how does it play and where is
the tracking knob?</DIV>
<DIV> </DIV>
<DIV>Are you using manual or auto tracking?</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>Chris Hill</DIV>
<DIV>WA8IGN</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 7/30/2011 11:56:38 A.M. Eastern Daylight Time,
lasvegastvengineer@yahoo.com writes:</DIV>
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<TD vAlign=top><BR>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
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