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<DIV>The Ampex pre amp that was provided is part of the RA-4000 interface
kit. It mounted on the back side of the transport where the audio
heads was located. You removed the audio head connector from the deck with
a couple of Allen screws and then put this small pre amp on as a replacement
for the connector. Reattach the original cable and you have an in
line pre amp. There was another cable that was part of the harness
added. It went to the RA-4000 interface. Then the time code was sent
down one control cable to the RA-4000.</DIV>
<DIV> </DIV>
<DIV>A very good editing system. The only thing that I had a problem
was that the capstan servos in the AVR-2 were so good that TSO would be released
before boost was turned off. Then boost would pull the tape and the
machine would be out of lock by a frame. Hard to do match frames.
Frank Davis solved the problem about 3 in the morning when we finally proved
that the machine was doing this. There was a modification to the RA-4000
that was released later. The VR-1200 would do the same thing but
rarely. That capstan servo took longer to lock and thus it was not as big
an issue.</DIV>
<DIV> </DIV>
<DIV>We did find that we could do color frame edits all day long with the
system. We took H Drive and divided it by two to give a 7.8 KHz
pulse. This was like a PAL pulse that the editor would recognize and then
it commands would always be color framed as long as you did even to even or odd
to odd addresses.</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV></FONT></BODY></HTML>