Unknown CDC unit , looks like a drum memory ?

[Jon Elson]

On 05/16/2018 11:13 AM, jos via cctalk wrote:
> Visited an older collector recently, and in his shed he 
> has a strange thing, labeled CDC, that somehow looks like 
> a drum memory, but then again not ( drum looks too small 
> to be usefull )
>
> The controller that goes with is  a transistor based  
> monster on countless small pluginboards.
>
> Pictures on  ftp://ftp.dreesen.ch/Unknown_CDC_Stuff
>
>
Yes, it is a drum, for sure.  Seems to have a LOT of heads.  
The controller may be a regular disk controller, or can be 
used with both.  I noticed an "on cylinder" light on the 
panel.  But, it should be pretty easy to repurpose a disk 
controller to handle a head-per-track drum.

Jon