[QuadList] Multi Standard machines

[Chill315 at aol.com]

The request for a machine to play both PAL and NTSC has led to an  
interesting discussion.
 
I did some research and found that the universal Colortec works in both Pal 
 and NTSC.  This solves the TBC problem.  
 
The VR-1200 is a more difficult machine but has advantages.
 
The AVR-2 is a beautiful machine.  It does not do multi  standards.
 
To change an AVR-2 between NTSC and PAL requires a lot of  board changes.  
 
Board 2    Capstan Servo
 
Board 3    Control Track Processor
 
Board 12    Modulator
 
Board 15    Switcher and Equalizer
 
Board 16    Demodulator
 
Board 17    TBC Video Input
 
Board 20    Clock Generator
 
Board 22    Memory
 
Board 23    Two line delay
 
Board 28    Logic
 
Board 29    Sync Gen Logic for PAL only
 
Board 30    Sync Gen
 
As you can see there is not an easy solution to use the AVR-2.  It is  the 
easiest machine to use, and you can get very good pictures.  I would go  for 
it is all one is doing is a single standard and High Band only.  If  not, 
then you are stuck with a VR-1200 series.  
 
Hope this spreads some light.
 
Chris Hill
WA8IGN
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