Re: Apple II keyboard encoder MM7540AAF

["Michael J. Mahon" <mjmahon@aol.com>]

GH 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.
>
>
> Mike, I'd be interested in getting one to keep as a spare.  I'll
> contact you off list.
>
> By the way, shouldn't it be MM*57*40AAE?
>
> I'm also looking for some replacement keyswitches for that keyboard,
> a couple of mine don't always return to the up position and it seems
> like they can't be opened up without cutting or breaking them.
> Do you know of a source for them?

You might consider putting a "just right" spring under the keycap,
around the post, to provide the proper return force.

If the internal spring is not broken, then the switches may just need
cleaning to reduce friction at the post.  A good plastic-safe contact
cleaner should do the job.

Contact cleaners will also contain a very small amount of lubricant
to stay behind after the solvent evaporates.

-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."