[Coladam] Busted ADAM drives?

geoffrey oltmans oltmansg at bellsouth.net
Wed Mar 28 23:13:15 CEST 2012

I think I've got most of the tools necessary to do this, just need to play with 
a few broken examples. The one thing that I don't have is any sort of 
calibration disk. Back in the days of the C-64/1541, I used to use just any old 
commercially duplicated floppy disk, and the density was such that it was easy 
enough to get close by eye. These days I have ready access to an oscilloscope 
and a bit more know how under my belt.

When I get my stuff back out of storage I'll experiment with mine and see if I 
can make them any better.

I know you have mentioned before that you have had very bad luck shipping Coleco 
drives. I can't for the life of me understand why Coleco drives should be 
unique, as I've shipped a number of other non-coleco drives without incident. 
There really isn't anything special to them versus any other brand. I wonder if 
environmental factors (heat/cold, humidity) or temporal ("worked when it left 
here!") come into play. I have certainly noticed that my drives tend to be more 
finicky when they are first turned on versus when they are warmed up for some 
time (5-15 minutes).

From: Frances and/or Richard Clee <cleechez at tamcotec.com>
To: coladam at adamcon.org
Sent: Wed, March 28, 2012 3:47:42 PM
Subject: Re: [Coladam] Busted ADAM drives?

Hope you do, geoff - there is a very big demand for folks who can tinker 
Coleco disc drives back to life - present company included. Admittedly 
yours is for the moment a bit of a left-handed offer, but hope springs 
eternal and if you need any encouragement just holler - the chorus will 
stun you! - rich

On 3/28/2012 12:09 PM, geoffrey oltmans wrote:
> What with all this talk of ADAM floppy drives, I was curious... how many of 
> different flavors of floppy drives were produced? And as a side how many of 
> out there have bad ADAM disk drives? A much as we all like DDP drives ;) it
> seems like keeping as many of these in working condition as possible would be
> beneficial. I myself have two drives (unmodified currently) and they are a
> little flaky. One works mostly after it's warmed up a bit, and the other I
> wouldn't want to trust to write anything with. I've also got Rich Clee's PM
> floppy disk controller that doesn't quite work right (although I haven't 
> with it yet since you lent it back to me Rich :( ).
> We just sold our house (yay), and are in the process of trying to find a new
> place. Once we get settled in to a new house I think I'm going to go "get my
> ADAM on" (as Jim put it) with some hardware tinkering.
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