[GreenKeys] Interesting modem for a teletype up on eBay

[Chris Elmquist]

I offered that I'd send a few pictures of my Anderson-Jacobson branded
model 33 with internal acoustic coupler so here they are,

https://picasaweb.google.com/117891262011490779403/AndersonJacobsonModel33Teletype?authkey=Gv1sRgCOOcsIee0934eA&feat=directlink

You can also see the slashed-oh and unslashed-zero on the keyboard which
is a little unique I think.

I didn't see that configuration in a recent document that went around
showing which companies certain keyboards were built for.

Sadly, when I got this machine, it had been stashed in a basement
where the owner kept some kind of pet birds.  The birds had
decided that this M33 was a great place to dump...  you know...
dump everything... including sticks, feathers, seeds, stones... both
before and after consuming said items.  The inside of the machine was
a disaster.  They also pecked at the rubber cups on the acoustic coupler
and so those are a little beat up with divots all over them.  Sigh.

Was a lot of work to clean it up and was my first complete tear down
and rebuild of a '33.   But it works FB now including punch and reader!
UV has gotten the best of the keyboard and there's a big patch on the lid
where a giant decal had been that caused that area to age differently...
but I guess we call all that patina right? Plastic patina?  :-)

Chris N0JCF

On Wednesday (02/02/2011 at 09:30AM -0600), Chris Elmquist wrote:
> Sorry-- I meant to comment on the modem modulation too...
> 
> The unit I have is most definitely a Bell 103 originate modem.  110 or
> 300 baud intended for originating the call to a timeshare service
> such as John describes.
> 
> A 103 originate modem transmits with 1270/1070 mark/space tones and
> receives 2225/2025 while the answer modem obviously does the reverse.
> 
> ie,
> http://en.wikipedia.org/wiki/Bell_103_modem
> 
> Chris N0JCF
> 
> On Wednesday (02/02/2011 at 09:24AM -0600), Chris Elmquist wrote:
> > On Wednesday (02/02/2011 at 08:04AM -0600), John Foust wrote:
> > > At 12:10 AM 2/2/2011, Christian Gauger-Cosgrove wrote:
> > > >I find it most interesting because it appears as though it is designed
> > > >to replace the right-hand cover panel of a Model 33 or Model 32. 
> > > >Quite ingenious if you ask me.
> > > 
> > > Seems quite normal to my USA Midwestern computer-geek eyes.  Several of 
> > > the first 33s I used were like this.  300 baud to DEC time-sharing systems
> > > in the mid-70s.
> > > 
> > > 1200 baud wasn't commonly available to consumers until, what, 1984?
> > 
> > I have a '33 that was rebranded as an Anderson-Jacobson unit and has
> > an AJ acoustic coupler built into the right-hand cover panel just as
> > you describe.
> > 
> > The modem plugs into the 20mA loop at the Molex connector bank at the
> > back of the '33 with a single connector and gets power and transmit
> > and receive loop over that single connection.
> > 
> > The LOCAL / LINE switch was relocated to the panel of this modem and
> > then the front plate (below the keyboard) of the '33 has no hole where
> > the local/line switch would normally be located.  That plate is then
> > logo'd with the Anderson-Jacobson "waveform" logo and the 33's lid over
> > the typing mechanism has an AJ decal stuck over where the Teletype logo
> > is normally found.
> > 
> > This '33 also has a slashed-oh on the keyboard and typewheel--  as
> > opposed to the more common slashed-zero.
> > 
> > I'll take a couple pictures and send them to the list as soon as I can.
> > 
> > Chris N0JCF
> > 
> > -- 
> > Chris Elmquist
> > 
> 
> -- 
> Chris Elmquist
> 

-- 
Chris Elmquist