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<DIV><FONT size=3>As Wayne Wilson states, the AST is a closed-loop servo.
It was a great moment in my life when I closed that loop the first
time.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>The idea of the AST came from Richard
Hathaway. He thought of it while driving back from vacation in
Canada. I had detemined that there were three major mechanical problems
that made interchange of the old one inch VTRs difficult or impossible.
Don MacLeod liked the AST idea so I was put on full time to determine the
characteristics of bi-morphs.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>I spent nearly a year trying different types of piezo-electric
materials on my workbench. I was isolated from the rest of the video
engineers because the chief engineer wanted everyone to work on Quad--the Ampex
bread and butter. There were three of us--Don Macleod, Richard Hathaway
(Mechanical genius), and me. Don reported to the chief engineer every
week. I have no idea how Don covered for me.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>Hathaway took a 7900 scanner and modified it so that high
voltage could be applied to the upper scanner. Don obtained a VR-7950 and
we modified it. Ray Ravizza was added at this time and he did most of the
electronics. We used a Color Corrector from Elk Grove so we could
demonstrate in color. I still have the tape we used for
demos.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>It was me and Hathaway who worked out the various versions of
AST until we got one that satisfied all requirements.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>I believe that we used the first digital TBC--the
TBC--1. </FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>Jim Wheeler</FONT></DIV></FONT></BODY></HTML>