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<DIV>Hi Scott:</DIV>
<DIV>
<DIV> </DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>Don Norwood<BR>Digitrak Communications, Inc.<BR><A
href="http://www.digitrakcom.com/">www.digitrakcom.com</A></DIV></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=lists@chicagoaudio.com href="mailto:lists@chicagoaudio.com">Scott D.
Smith</A> </DIV>
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<P></P><FONT size=-1><FONT
face="Helvetica, Arial, sans-serif">Don:<BR><BR>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.<BR><BR>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.<BR><BR>--Scott<BR><BR><SMALL>Scott D. Smith CAS<BR>Chicago Audio Works,
Inc.<BR></SMALL></FONT></FONT></BLOCKQUOTE></BODY></HTML>