[sdiy] UA726 clone possible?

[rsdio at audiobanshee.com]

On Sep 14, 2015, at 3:56 AM, Tom Arnold <xyzzy at sysabend.org> wrote:
> On Wed, Sep 09, 2015 at 02:21:14PM +0100, Tom Bugs wrote:
>> I wondered before why no-one seems to have done a clone of the ua726.
>> 
>> Doesn't *SEEM* all that complex?!
>> A nice matched pair (eg LS318) is the main core.
>> 6 transistors (I presume general purpose?), 2 x 6V2 zeners and 6 
>> standard resistors.. - those parts being for the heating element.
>> 
>> Get the pin placement right, encapsulate it in goo..
> 
> Anyone have a Don Martin Minimoog?
> 
> http://www.synthfool.com/donimoog/IMG_369.JPG
> 
> From :
> http://www.synthfool.com/donimoog/
> 
> Event though Kevin said the clones didn't work very well, I've always been
> sorta curious what was actually in those modules.

Those daughterboards look like they mount to the back side of the PCB. Is that how the original uA726 were mounted? If not, then the pinout of the daughterboards must be a mirror image (reversed) from the original uA726 package. In other words, even if these poorly-working clones were available, they probably wouldn't have the right pinout for normal placement.

Brian