RK05 packs

[Mike Stein]

----- Original Message ----- 
From: "Noel Chiappa" <jnc at mercury.lcs.mit.edu>
To: <cctalk at classiccmp.org>
Cc: <jnc at mercury.lcs.mit.edu>
Sent: Wednesday, September 07, 2016 1:18 PM
Subject: Re: RK05 packs


>    From: Paul Koning
> 
>    > Some IBM systems ... have a "2315" drive which is an RK05. 
> 
> Yeah, I think that was the original source of these packs. The Diablo 30/31
> drives (used on the RK11-C controller before the RK05 was created) were
> designed to use 2315 packs.
> 
>    > From: Tony Duell
> 
>    > My intention was to put the hub on a spare spindle .. put the platter
>    > on, turn it round by hand and use a lever-type dial gauge to get
>    > minimum run-out. 
> 
> One of the people I buy PDP-11 parts from reports that he actually did this
> (using the exact procedure you describe) BITD. Apparently there's some
> multi-platter pack that has the same exact platter as the RK05 (2315) pack,
> and he had some damaged RK05 packs, and moved platters from the bad
> multi-platter pack to the RK05's.
> 
> Noel
============================

FWIW Burroughs also used drives/platters like this with their small systems (B80 - B1800); ISTR that they were ~ 5MB but 32 SPT instead of  12 or 16; unfortunately I dumped all of mine long ago.

http://www.ricomputermuseum.org/Home/equipment/burroughs-b800

m