AVR 2 Questons for machines near end of run

[Chill315 at aol.com]

Perhaps Bill Carpenter will be the expert on this one.
 
David Dean in Great Britain has an AVR 2 with the TRW A to D chip instead  
of the original A to D boards.  I also looked at the picture that he has on  
line showing the machine.  There was a different control panel  layout.  
see _www.westpoint.tv_ (http://www.westpoint.tv)  for the  pictures
 
So when did Ampex change the A to D design to the TRW chip?  How many  were 
made with this?
 
When did the control panel change to place the meters on the left  side?  
 
I have seen pictures of a number of machines that have the deck tilted at  
an angle.  Was this an Ampex option or did this become standard on later  
machines?
 
Or are these things making this a one off machine?
 
Chris Hill
WA8IGN
 
 
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