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<DIV>VR-1200 B Series Inter-Sync 60 Hz Capstan Oscillator Modification</DIV>
<DIV> </DIV>
<DIV><BR>This was given to me by someone a long time ago. It made life
simpler.</DIV>
<DIV> </DIV>
<DIV>The capstan Oscillator is difficult to set and is critical for assemble
edits. It sets the free run speed for the capstan. There is a simple
modification that will provide the user with a course and fine adjustment pot
for the oscillator.</DIV>
<DIV> </DIV>
<DIV>Remove Board 13 from the Inter-Sync.</DIV>
<DIV> </DIV>
<DIV>Find R-78, the 625 Capstan Frequency adjustment. </DIV>
<DIV> </DIV>
<DIV>Lift the wire that connects the end of the pot to Q-12 Collector.
This is the end not connected to R-60, a 300K resistor.</DIV>
<DIV> </DIV>
<DIV>Attach wire disconnected to the End of R-20 that is not connected to R-38,
a 20K resistor.</DIV>
<DIV> </DIV>
<DIV>Reinstall board</DIV>
<DIV> </DIV>
<DIV><BR>TEST and Setup</DIV>
<DIV> </DIV>
<DIV>Center R-78</DIV>
<DIV> </DIV>
<DIV>Adjust Capstan Oscillator using R-20.</DIV>
<DIV> </DIV>
<DIV>From now on only use R-78 for Capstan Frequency Adjustment unless pot is
near the end of range. Then re-center and set Oscillator with R-20.</DIV>
<DIV> </DIV>
<DIV>R-20 is now the COURSE adjustment and R-78 is the FINE
adjustment.</DIV></FONT><DIV CLASS="aol_ad_footer" ID="e66e1d4d38e140b35426bba4a693badb"><br/><font style="color:black;font:normal 10pt arial,san-serif;"> <hr style="margin-top:10px"/></font></DIV></BODY></HTML>