[QuadList] Dolby Question

[Don Norwood]

Hi Scott:

Thanks for your reply.  The "mystery" cards are 225, not 255.  They are single channel Dolby A as are the 55 cards, so the 380 uses 2 of them installed on a 245 module which is installed in the 380 frame.  I don't know if this is relevant, but the 225 cards are in the newest frame while the older frames have the 55 cards.

Fortunately, all of these work just fine and I have more than I need, but I was just curious about the difference since the manual I have only covers the 55.

Don Norwood
Digitrak Communications, Inc.
www.digitrakcom.com
  ----- Original Message ----- 
  From: Scott D. Smith 

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  Don:

  Those are pretty esoteric. Not sure if I have anything in my old literature that deals with the 380 processors. As best as I can recall, both the CAT 55 cards and 255 cards are Dolby A. I think the difference is the chip sets, and the I believe the 255 is dual channel, as opposed to the single channel CAT 55. Dolby had a few different cards they released for VTR use, including the CAT 155, 221 and CAT 226.

  Dolby isn't the company it used to be. Trying to find anyone there with info on their old products is difficult, to say the least. I think the CAT 55 cards were designed around 1976, and released in summer of 1979.

  --Scott

  Scott D. Smith CAS
  Chicago Audio Works, Inc.
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