Re: Apple II keyboard encoder MM7540AAF

[Mike Willegal <mike@willegal.net>]

They are standard parts made by National.   National did offer custom 
mask programming of the same devices.  Apple used the standard AAE 
version, mass produced by National.  I made a mistake on the part 
number, it should be MM7540AAE, not AAF - though I'm not sure what the 
difference is (my data sheet shows the same program in both of them).

Regards,
Mike Willegal

Michael J. Mahon wrote:
> mwillega wrote:
>
> > One of these parts blew on one of my old Apple II keyboards. After
> > quite a number of inquiry's I found a source for replacement parts,
> > but the cost is high $33(each, quanity 12) and there is an minimum
> > order of $200.00 in effect. Anyone have a need for these and
> > interested in sharing with the cost.
> >
> > If you know of a better source for these parts, let me know.
> >
> > If I decide to order them on my own, I will offer extras for resale on
> > my website, at some additional cost. If you go in with me now, I will
> > share cost with no markup.
>
>
> Are those the Apple-custom-programmed encoders?  Generic ones
> won't work for the older Apples.
>
> -michael
>
> NadaNet file server for Apple II computers!
> Home page:  http://members.aol.com/MJMahon/
>
> "The wastebasket is our most important design
> tool--and it's seriously underused."