[GreenKeys] Vintage Model 28 cabinet

[Don Robert House]

Jim,
My earliest drawings are from 1957 all them show 40 terminals.  Some
show adding an additional terminal block going up to 60 terminals for
certain typing units arranged for selective calling.  One drawing for a
28 ASR shows 145 terminals and another shows 150.

Don


On 17 Mar 2011, at 8:54 PM, Jim Haynes wrote:

No, not something on ebay, hi.

Several years ago someone gave me a M28 with what appears to be quite an
early cabinet.  The item number is LAC200AA, which means it was  
originally
black wrinkle, but somebody did a sloppy job of repainting it with a  
gray-
green paint, so I'm now thinking of getting the paint stripped and
repainting it.

Rather than the usual bottom compartment with a door, this cabinet has
a shelf, rather like a Model 15 table.  Instead of the two 20-terminal
Jones strips in the back, it has three 10-terminal ones.  (I see that
shown in the parts book.)  The copylights are incandescent, not
fluorescent like some early 28s, but the copylight transformer is on the
left hinge of the cover rather than on the right, and the copylight
switch is up near the window.  Yet it has the more modern style
copyholder, not the old one.  The LESU doesn't have a nameplate.  There
is a power supply in there with a 1960 date, but of course that could be
a late addition.  The former owner completely remade the cables that go
to the base and typing unit.

The pad under the base is some kind of foam rubber.  Now the oldest
machine I ever saw, late 1950s, had that pad made of fiberglass, and
later I've seen thick felt.  Also inside this machine are crumbs of the
soundproofing foam that turns to powder as often seen in some old
Teletype stuff; I didn't realize that had been tried so long ago as
this cabinet.  Maybe it wasn't, maybe the previous owner updated the
padding.

So it's a curiosity; and I was wondering if anyone out there might have
schematics or wiring diagrams that go back far enough to show a cabinet
with 30 terminals rather than 40.  Just wondering what they did  
different
back then, and why 30 terminals turned out to be too few.  (I know there
are mod kits to add even more terminal strips to the inside of the
cabinet.)  Looks like there is also a mod kit to convert a 30-terminal
cabinet to a 40-terminal model.

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