Resurrecting RK05

Robert Jarratt robert.jarratt at
Tue Jan 6 15:36:15 CST 2015

> -----Original Message-----
> From: cctech [mailto:cctech-bounces at] On Behalf Of tony
> Sent: 06 January 2015 19:32
> To: General Discussion: On-Topic Posts
> Subject: RE: Resurrecting RK05
> > That's a good idea. It should load heads with no problem, but should
> > not be able to read or write. I would suggest going through all of the
> > servo adjustments in the PM procedure but would advise you NOT do a
> > head alignment.
> Can't some of the servo adjustments affect the exact point at which the
> locks?
> In other words you should really do a head alignment after adjusting them.
> Whatever you do don't put the alignment disk in as the first pack you try,
> very obvious reasons!. But if you have an alignment disk I see no reason
not to
> do the head alignment -- after you are sure the drive is OK.
> What I would do is to make sure it will spin up with a 12 sector pack (as
> are
> common) and the heads fly, etc

It is good to know that RK05 packs for the PDP11 are common. I have an RK05
drive for my 11/45 but no packs. It is going to be a while before I get this
machine going again, but if anyone in the UK has suitable packs they might
be prepared to part with, it would be good to hear about it.



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