[GreenKeys] M-28 TD issues

[John Nagle]

> From: DR HOUSE<Packard42 at gmail.com>
> Re: contact cleaning
>
>    You might want to run a piece of paper thru the contacts to clean
> them up.

     There's a tool for that, called a "contact burnisher".  See
"http://www.tpub.com/content/neets/14175/css/14175_156.htm"
Costs about $2.50 from Fry's.  I used one when my Model 15
was dropping one bit at the keyboard contacts.

     An emery board or sandpaper is too abrasive, and can
wear contacts.  Also, emery dust is conductive.

     Brass (not steel) wire brushes are useful for commutators,
sliding contacts, and such.

					John Nagle