RK05 packs

[Al Kossow]

On 9/7/16 11:46 AM, Paul Koning wrote:

> TPI, as in "transitions per inch"?
> 

tracks per inch

> I vaguely remember that the 1311 (20 sectors of 200 digits each per track) used silvery colored heads.  I wonder if those are the same.  They were pretty sturdy; one day when we had a hydraulic leak, the FE just cleaned heads and pack with isopropyl alcohol, fixed the leak, and put the drive and pack back into service.
> 

2311 is 100 tpi, 2314 is 200


http://s3.computerhistory.org/groups/ibm-1311-2311.pdf has a nice picture of the 2311 heads