[GreenKeys] Minor problem with my Model 20

[Bill Buzbee]

The recent flurry of email regarding the Model 20 that was recently on eBay
made me want to get my Model 20 up and running again.  A year or two ago, I
moved it out to the garage to make space for guests, but it never made it
back in.  Anyway, it was a warm and sunny weekend, so I took the opportunity
to give it a good oiling (mostly 30-weight non-detergent motor oil), and
then tested it while still in the driveway.  It worked perfectly, and I
moved it back into the house.
The next morning, however, I fired it up and was greeted with extremely
garbled text.  I assumed I must have knocked something out of adjustment
moving it into the house, and so spent a half-hour or so fiddling with the
baud rate and range finder.  After a while, it was printing perfectly again.
 However, later in the day I tried again and got garble.  Only then did I
realize that it wasn't out of adjustment - but the bad copy was a function
of whether the machine was warmed up.

I did one more experiment this morning.  I turned in on, but printed nothing
for a half-hour (not running open, just running).  Same garble when I
started printing, and it cleared up after about 20 minutes of copying text.
 Following is a link to a photo of the same paragraph (from the AP "News on
the Hour") with a cold machine, and again after 20 minutes of printing:

http://www.homebrewcpu.com/garble.jpg

So, what would folks recommend I do?  Am I likely correct in assuming that
I've just got some old gummy oil somewhere - or did I perhaps miss something
that needed oiling.  Any advice would be appreciated.

Thanks,
...Bill Buzbee
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