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<DIV>This is an interesting discussion. I see a couple of issues.</DIV>
<DIV> </DIV>
<DIV>One has to assume that the tape was recorded to saturation. That way
the magnetic flux will be at the maximum possible.</DIV>
<DIV> </DIV>
<DIV>Looking at the numbers that Ennes has in his VTR book, it will be
interesting to come up with a circuit that has the right emphasis and gain
required.</DIV>
<DIV> </DIV>
<DIV>Not knowing the magnetic flux off the tape, it would be interesting to see
if reading it would be possible. Was not the orsted around 600? I do
not have any old data sheets for tape. The 10 mil track width would
help. The frequencies laid down will go from 4.28 to 10 MHz unless we are
talking Super High Band and then the max would be 12.2 MHz. </DIV>
<DIV> </DIV>
<DIV>Could an air film be pumped into the head tape interface to allow the
flying of the heads?</DIV>
<DIV> </DIV>
<DIV>Optical will not work with the previous type of developers. The need
to see a bandwidth of 12.2 MHZ in each track is going to be difficult. The
small particles would probably ruin the tape if it is ever run again.</DIV>
<DIV> </DIV>
<DIV>How can one play a tape without destroying the layers of the tape.
Not having played a tape for years, what is the condition of the binders in a
typical tape? Is there any one type that has less problems? Is there
one that is really bad?</DIV>
<DIV> </DIV>
<DIV>Are there any special procedures that one should use.</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV></FONT><br/><font style="color:black;font:normal 10pt arial,san-serif;"> <hr style="margin-top:10px"/><b>A Good Credit Score is 700 or Above. <a href="http://pr.atwola.com/promoclk/100126575x1218822736x1201267884/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26bcd=febemailfooterNO62"> See yours in just 2 easy steps!</a></b></font></DIV></BODY></HTML>