50g

Hi there.
You may want to consider the following threads on comp.sys.hp48:

http://groups.google.com/group/comp.sys.hp48/browse_frm/thread/96d71a9de
d6348ec/347f113ccb896a9c?lnk=gst&q=50G+serial+cable&rnum=3#

http://groups.google.com/group/comp.sys.hp48/browse_frm/thread/ecfb14a98
192024f/b48bfd8d2299bfc2?
lnk=gst&q=50G+serial+cable&rnum=5#b48bfd8d2299bfc2

Hope this helps.
Best regards.
Giancarlo