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Re: [RTTY] PSK31 is faster (Was FD RTTY Question)

To: RTTY Reflector <rtty@contesting.com>
Subject: Re: [RTTY] PSK31 is faster (Was FD RTTY Question)
From: Kok Chen <chen@mac.com>
Date: Thu, 28 Jun 2012 00:14:30 -0700
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>
On Jun 27, 2012, at 11:05 PM, Tom Osborne wrote:

> I had a model 28 here 'back when', but it was only a 60wpm machine (I 
> think it was 45 baud).

Aha, Wikipedea has the answer:

http://en.wikipedia.org/wiki/Teletype_Model_28

The KSR28 is a Baudot machine.

By using Google, I then found this:

http://simh.trailing-edge.com/pdf/pdp18b_doc.pdf

The first 18-bit CPU from DEC (PDP-4) indeed uses the KSR-28 and Baudot 
encoding.

This next article,

http://www.soemtron.org/pdp7history.html

mentions specifically that the PDP-7, successor of the PDP-4, changed from 
using Baudot to using ASCII.

73
Chen, W7AY






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