31 Dec
2025
31 Dec
'25
1:51 p.m.
Hello,
I will be greatly interested in getting those cartridges if they are still
available. I will be getting soon my first DEC RK05 drive, unfortunately I
won't have any rk cartridges to it. I'm aware that those are 8-sector but
the RK11 requires 12-sectors ones.
However, that could be overcome with simple microcontroller inside drive
logic, mimicking those required 12+1 sector pulses with sync to 8+1 pulses
from the real platters. I don't also worry about interchangeability,
because without proper heads alignment my rk05 won't be able to reliable
read or write cartridges written on another rk05 drive anyway.
Looking forward to getting your replay
Best regards
Mikolaj
On Tue, Dec 30, 2025, 14:06 Kurt Nowak via cctalk <cctalk(a)classiccmp.org>
wrote:
Update - they person who wanted them had a change of
heart, so they are
available again for anyone who wants them. I'd be willing to send no more
than 4 in a box. I'd hate to just toss these things in the garbage but it
looks like it may come to that.
-Kurt
On Fri, Dec 12, 2025, 09:02 Kurt Nowak <knowak(a)alumni.calpoly.edu> wrote:
Thanks for all the info, especially info on the
spring loaded access
door.
The vacuum venting makes sense but I'm still
perplexed as to how the
read/write head gets access to the magnetic surface. As I stated in my
original posting, 4 of them seem to have broken off. Do you think it's
best
to open the rest of the broken ones up (in a very
clean dust free area)
and
remove them or leave them in there flopping
around risking damage during
transit? They are pretty easy to open up.I was thinking of carefully
taping
shut the opening with masking tape and a small
patch of plastic.
Also, they have been claimed already, sorry. A portion will be donated to
CHM.
-Kurt
On Fri, Dec 12, 2025 at 12:33 AM Christian Corti via cctalk <
cctalk(a)classiccmp.org> wrote:
On Wed, 10 Dec 2025, Kurt Nowak wrote:
I came across a big box of 12 of these disks
which my dad acquired
through
work back in the 70s, and squirreled them away in
the attic after they
had
These are disk cartridges from an IBM 1130 system.
Christian