28 Oct
2008
28 Oct
'08
4:23 p.m.
Chuck Guzis wrote:
The QT-8/842 even uses the same power connector as an
SA-800 (i.e. 6
pin locking). And the motor is indeed AC. I have QT-8's with both
120v 60Hz and 220v 50Hz motors--and a pulley to convert the 50Hz
motor to spin the drive at 360 RPM.
Generally, the QT-8 is a drop-in for the SA-800 drives.
It mostly
has the same jumpers, including HS and 8/16/32 sector selection as
well as the same bezel configuration.
---
Is there a difference between a QT-8 and (what the original poster asked
about) the DT-8? I know that the DT-8 was a double-sided,
double-density drive. The DT-8 (DataTrak-8) did have a spindle motor
that ran on Mains AC. Back in the long ago days, I designed a floppy
controller that worked with DT-8's (using an LSI controller chip and a
custom data separator circuit). It was used in a proprietary bus
structure system, that ran with Motorola 6809 CPU. I wrote drivers for
FLEX and OS-9. They were nice, fast drives, as floppy drives go. As I
recall (and this might be incorrect), they were "half height" (as
compared to an SA-800) drives.
Rick Bensene
http://oldcalculatormuseum.com