On 25 Jul 2010 at 9:56, Fred Cisin wrote:
  THESE DAYS, we're looking at used, or maye NOS, so
we're shopping by
 model number, and the original intended market is meaningless. If I
 find a 55GFR, I have no idea what market it was marketed for. 
...and Teac drives can vary wildly with respect to jumpers and
circuitry.  Most of the 55GFRs that I see nowadays are -7xxx models.
--Chuck