It may very well have the double head. It's not dropping any characters at
1200. I am surprised. That's 4x the expected speed!
Here is another sighting of a Silent 703 working at 1200 bauds:
ml
Says the author in the comments: "My Silent 700 came with a manual. So I
went by that. I was pleasantly surprised that my Silent 700 had the "high
speed option"."
So there was a high-speed option for the Silent 703 apparently?
Marc
  -----Original Message-----
 From: James B DiGriz [mailto:jbdigriz at 
dragonsweb.org]
 Sent: Friday, October 29, 2021 10:01 PM
 To: cctalk at 
classiccmp.org
 Cc: CuriousMarc
 Subject: Re: Overclocked TI Silent 703 at 1200 bauds?
 On Fri, 29 Oct 2021 20:35:50 -0700
 CuriousMarc via cctalk <cctalk at classiccmp.org> wrote:
  I recently acquired a TI Silent 703 on ePay and
just fired up. It
 worked right away. But I expected it to work at 300 bauds as
 advertised, and to my surprise, it clocked at a the head turning
 speed of 1200 bauds! Did they hot-rod it later in its product life?
 It says MODEL 703 at the back, part no. 2310503-0010. I did not open
 it up yet.  Is this a hardware mod? Is there an internal switch that
 can toggle it between 300 and 1200?
 Marc
 
 I'm drawing a blank on that PN. I'm scanning in the 1985 TI Express
 Catalog right now and it only lists the 2310503-0001. I think there is
 an int'l version -0003.  Even if the serial port would work at 1200,
 though, the printhead only does 45 cps. Pic of a supposed -0010 on
 Worthpoint, but I don't subscribe for details or confirmation.
 However, it would have to have something like the 2 char thermal
 printhead in the 780 series to print without buffering at 1200 baud, I
 would think. Dig some more in daylight.
 jbdigriz