Re: Duodisk analog boards: are all versions interchangeable?

[buggie@pegasus.unm.edu (stephen e buggie)]

If you are going to discard the damaged DuoDisk analog board, I'll offer
$4 plus $2.00 postage to try to fix it for my own use.
Please indicate where you scratched it.

If you cut a tracing on the board, loot at it closely and find the two
points on opposit sides of the scratch that are now disconnected.  Solder
a wire to reconnect the points ---- this _could_ be the effective repair!

While de-soldering chips, sometimes I tear a tracing.  But soldering a
wire "jumper" usually fixes the problem.

Regards,  Steve "solder-slinger" Buggie		buggie@unm.edu







Andrew Weller (awweller@rochester.rr.com) wrote:
: I have a Duodisk I received as part of a used Apple IIe system.  I
: bought the system to make images of some old Apple II 5 1/4" floppy
: disks (from when I owned an Apple IIe system many years ago) that have
: sentimental value.  I read about the problem with Duodisks ruining
: disks under certain conditions, and, not wanting to take chances, made
: the necessary modification to the Duodisk analog board.
: Unfortunately, in my overzealousness I accidentally scratched it.
: While Drive 1 seems operational, the speed of Drive 2's motor varies
: wildly.  Despite Drive 1 seeming to work properly, I still do not
: trust my disks to it.

: I found a dealer selling Duodisk analog boards for a reasonable
: price, but I am unable to tell from the description whether I can
: safely substitute the board I would be buying for the board I
: currently have.  Here is the description:

: 	661-92130	Drive Analog Card DuoDisk

: On the board I have is no such identifying number; instead are the
: words "DUODISK ANALOG" and the number "676-[]101-[]" (where "[]" is a
: filled white box).  I have learned from reading past articles at
: Deja.com that these are essentially revision numbers (with others
: being "-[]102-[]", "-[]107-[]", etc.).  I wish to know:

: 	(1)  Does the number given in the dealer's description
: 	     identify Duodisk analog boards in general, so that if
: 	     I were to order one, I might get any revision?

:         (2)  Does it actually matter which revision I get, or
:              do they all have the same "interface"?

: Thanks in advance for any replies.

: -- 
: Andrew Weller
: awweller at rochester dot rr dot com