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<DIV><FONT size=3>Hi Chris:</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>I have a VR-1200 that has a mod so that in H-lock mode, it
functions exactly as you have described for the RCA LineLock. It's a small
circuit board added in the control panel. Basically an NE555
timer controlling mode selection when Play is activated and the
servo selector is set for H-lock mode. </FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>Don Norwood<BR>Digitrak Communications, Inc.<BR><A
href="http://www.digitrakcom.com">www.digitrakcom.com</A> </FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
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<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=Chill315@aol.com href="mailto:Chill315@aol.com">Chill315@aol.com</A>
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color=#000000 size=2 face=Arial> </DIV>
<DIV>RCA offered four modes of lock, Pixlock, LineLock, Switchlock, and
TW or Tone Wheel.</DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV>Pixlock was the same as Automatic in the Ampex Machines. Linelock
starts in full automatic and then after lock reverts to the same as
Horizontal, Switchlock was vertical lock, and TW is the original servo
system.</DIV>
<DIV> </DIV>
<DIV>RCA did have the advantage with LineLock that it would always lock
vertically for a clean switch and then if there was a problem, have a fast
servo recovery.</DIV>
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