-----Original Message-----
From: cctalk [mailto:cctalk-bounces at
classiccmp.org] On Behalf Of
drlegendre .
Sent: 15 October 2015 00:35
To: General Discussion: On-Topic and Off-Topic Posts
<cctalk at classiccmp.org>
Subject: Re: Fair price and ways to find a teletype
Brad,
A few montns ago, with a fair bit of help of the folks on this list, I did up an
Altair 8800 rebuild. And apparently you & I both saw the same videos, as I got
all hot and bothered about getting an ASR33 and using it to load software -
BASIC, for starters - into the Altair. And again, on members'
suggestion, I joined the Greenkeys list.
Too bad, but I was totally +shocked+ at the 'value' placed on ASR33 these
days!! Thousand dollars and more, not all all unusual.. and my resources just
can't justify that level of expenditure for what is generally a 'cheap' DIY
hobby of sorts. Meanwhile, a Greenkeys member in St. Louis, MO popped
up with a very nice M15 (ex-Bell) that was Free to Good Home. I have (or at
least had, ha!) a good friend in St. Louis, and he was able to take care of the
pickup for me - and several months later, i arranged to have it delivered to
my house by a relative.
Now the M15 isn't a 33ASR, and lacks the paper tape punch & reader (though
devices do exist). But what it is, is a truly fantastic piece of electro-mechanical
engineering that borders on the "tight metal" genre of some earlier business
machines, such as the Felt & Tarrant Comptometer. If you have general
mechanical experience, I'd say the M15 is roughly on a par with a 2-spd or
even 3-spd automatic transmission, in terms of mechanical complexity (the
the tranny will have a higher parts count.. I think!).
So while they can be worked with, and documentation is plentiful, they are a
bit intimidating the first time you see one in action - or inaction, as it may be -
and they do NOT respond kindly to false moves or other ham-fistery. But
they are well worth learning, and don't yet seem to have joined their later
progeny in the financial stratosphere.
-Bill
I think you would be surprised to know that M15 and other Baudot teletypes were used with
early computers.
Not sure about the Altair but I certainly used a Creed 7B with my 6809 based system. Again
no paper tape, I had an Audio tape system.
They were also widely used in the UK on early computers in the UK. The Manchester MK1,
Ferranti Pegasus, Ferranti Mercury, Cambridge ENIAC
all used 5-level Creed teleprinters as output devices. As I am sure I have said before,
Mercury and Pegasus actually output 5-level tape on a high speed punch
which was then feed into a storage bin under the counter, and then read on a slower reader
connected to the Teleprinter. So physical buffering...
Dave
G4UGM