[QuadList] VR-1200B's on eBay

[Don Norwood]

Chris:

That sounds like a description of these modules.  I've either not heard of this aftermarket product, or I've forgotten it!  Here's the link:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=400073529841

Don

----- Original Message ----- 
  From: Chill315 at aol.com 
  To: quadlist at quadvideotapegroup.com 
  Sent: Tuesday, September 15, 2009 10:56 PM
  Subject: Re: [QuadList] VR-1200B's on eBay


  I could not find the units on e-bay.  Perhaps someone can post a link.

  There were after market DG and Auto Chroma modules.  The Manufacture slips the rusted open Iron Trap that is my brain.  They could not use the term Auto Chroma as that is a copyrighted term.  Also this one did have an advantage in that it did the auto equalization on a line by line sample where as the Ampex one that was standard did it on a 16 line sample that was for the whole head pass.  This would cause a problem with different amounts of chroma if the head was not concentric.  RCA was the first to do it the correct way in the CAVEC module.  It was easier to do it because they used the addressing for the memories in both chroma and velocity error correction.  Ampex did not have the units combined and as a result they did the auto chroma on a band by band sample.

  Chris Hill


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