MODIFY ALPS DF354H DRIVE FOR ATARI USE

Post by **exxos** » Thu Dec 14, 2017 3:23 pm

I tested one of these drives today. It supports 11S/83T & 22S/83T (Tested in FCOPY PRO)

DEFAULT IS DS1.

: ds1.jpg (396.45 KiB) Viewed 1745 times

CHANGE TO DS0 FOR ATARI USE.

: ds0.jpg (380.73 KiB) Viewed 1745 times

I ALSO SOLDER A 0805 10uF CAP ACROSS THE 5V RAIL ON ALL MY DRIVES>

: 0805cap.jpg (54.22 KiB) Viewed 1745 times

LOCATION FOR HD WIRE SELECT

: hdwire.jpg (358.68 KiB) Viewed 1745 times

WARNING! DO NOT UNDO THESE SCREWS! I PUT SOME THREAD LOCK ON THEM JUST TO BE SAFE!

If you do, it will upset the head alignment and you will spend the next 2 hours trying to get to all aligned again

: plate.jpg (269.26 KiB) Viewed 1745 times

Zarchos · Post by **Zarchos** » Thu Dec 14, 2017 4:20 pm

Interesting.
What is the cap for exactly ?

Post by **exxos** » Thu Dec 14, 2017 4:26 pm

Zarchos wrote: ↑
Thu Dec 14, 2017 4:20 pm
Interesting.
What is the cap for exactly ?

Smoothing on 5V rail. A lot of drives have electrolytics which dry up. So I just put a 10uF across the power and have done with it all.

Zarchos · Post by **Zarchos** » Thu Dec 14, 2017 4:30 pm

exxos wrote: ↑
Thu Dec 14, 2017 4:26 pm

Zarchos wrote: ↑
Thu Dec 14, 2017 4:20 pm
Interesting.
What is the cap for exactly ?
Smoothing on 5V rail. A lot of drives have electrolytics which dry up. So I just put a 10uF across the power and have done with it all.

Ok thanks for the info.