Floppy Drives for 3B1/7300, advice sought

[Ronald K. Wright]

I just added a long closeted 7300 to my collection of these little
marvels.  It boots up properly (with the 3 O.S.), but it refuses
to recognize the diagnostic disk if I boot up with it in the drive.
The light comes on (but no one is home as the old saying goes).

Popping the back reveals, 2 fans and a floppy drive which is properly
plugged in and which is now clean.  That exhausts my repair
abilities.

I did not pay much attention to several discussions on the floppy
drives which has passed by in the past.  I would appreciate it if
someone would advise on what specs I should ask for in trying to get
a replacement floppy drive.
-- 
R. K. Wright MD JD                     | office: uunet!medex2!medexam!rkw
Chief Medical Examiner, Broward County | nova:   novavax!rwright
Associate Professor Pathology          | home:   uunet!medex2!love1!rkw
University of Miami School of Medicine | fax:    305 765 5193