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<DIV>I always wondered what the tolerances were for the sizes of a
capstan. Reason for the question.</DIV>
<DIV> </DIV>
<DIV>I was remembering that on a VR-1200 the same tape played on two different
machines would show a positive or negative capstan error. Then we time
coded the same tape on the two machines and there was a difference in the final
time code number by several seconds. Thus there had to be a small
difference over the 32 minutes of tape. </DIV>
<DIV> </DIV>
<DIV>Now capstan sizes. The VR series used basically the same size
capstan. As well as the AVR-2. the AVR-1, ACR-25 used the vacuum
capstan that was substantially larger. As I never inspected an AVR-3, I
can only look at the pictures and surmise that it was similar to the AVR-1
capstan. What were the tolerances? Were the vacuum capstans a
variable that enters into the equation? I only worked with an ACR so do
not have the experience with the AVR-1.</DIV>
<DIV> </DIV>
<DIV>Does anyone have insight for this set of questions?</DIV>
<DIV> </DIV>
<DIV>Then the last question is we all know that the tape does have an
abrasive quality to it. Being that the back side touches the capstan and
front side touches the roller, the tape would not wear down the
capstan like an audio head or guide. Yet I have seen a number of capstans
that show a polished portion that could be taken for wear. Has anyone ever
had to replace a capstan due to excessive wear?</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV></FONT></BODY></HTML>