[Coco] Super Disk; was: Help floppy drive

[Bruce W. Calkins]

Laser Tracked is possible; one side of the head had around 50% more lines 
going to it from the circuit board.  That may be the side I could not see. 
I'll have to make a mirror on a wire this summer to look at it.  (I put it 
back together and back in storage.)



The devices are neat, it is the math that I am having to much fun with.  My 
last formal math class was High School Algebra in '69-'70.  Jumping into 
College level math now, is somewhat like trying to get a drink from a fire 
hydrant.



Bruce W.






>I remember going through all that wonderful stuff on FETS and OP-AMPS
> when I attented school - it was actually fun.
> I believe the superdisk is an optically (laser) tracked medium - the
> 120mb disk uses a laser to track the head when in 120mb mode, or so
> i've read... -r
>


>>
>> There was no physically evident second head (or pair of heads) inside.
>> There were two elements on the face of the head I could see without
>> destructively disassembling the unit. (Speculation) The two elements
>> might be for the two disk formats. I could not see anything I could
>> identify as a laser. (But, do I really know what to look for?) The
>> media has a semi-rough texture, like a micro-waffle grid. I'll take
>> another look and perhaps try it out sometime during summer break. As
>> challenging to understand as the chapter on FETs was the details of
>> OpAmps promises to equal or exceed. Finals start in 17 calendar days,
>> just 6 class & two lab days. Bruce W. > > Try swapping a 120mb disk
>> and 1.44mb disk to see if, as I had suspected, > there > is a head
>> element swap to accommodate the two different media. Maybe > there >
>> is a laser in there as well...(?) -ph -- Coco mailing list
>> Coco at maltedmedia.com http://five.pairlist.net/mailman/listinfo/coco