I've got a 3M DCD drive that's very similar--fixed multi-track head.
I've never seen a practical use for it, however, given the terribleness
of old QIC carts.
DEI also re-packaged the Exabyte 8mm transports in their own enclosures
with their own LCD readouts.   I've got one such drive here.
--Chuck
On 12/14/18 9:46 PM, AJ Palmgren via cctalk wrote:
  For view or download:  
http://bit.ly/2RZK28Q
 I came across this, and noticed that this early of a DEI model was not yet
 archived at
 
http://bitsavers.org/pdf/dei
 I'm not sure that it is scanned to the requirements of bitsavers, but I
 don't have access to the original, so I offer this if it is usable or of
 interest to anyone here.
 I'll probably also post it on one of my sites, at 
http://QICreader.com
 I also just acquired this DEI 301034-2 QIC Tape Drive, and have begun to
 reverse-engineer it.
 
https://ebay.to/2EjyxFn
 Best always,