1964 Antique MODEM Live Demo

[Tony Duell]

> 
> David Griffith wrote:
> > It certainly is of interest.  I'd like to get one of those for 
> > myself.  It shouldn't be too terribly hard to homebrew one of these 
> > things into a shoeshine box, right?
> "Pennywhistle", Popular Electronics, March 1976.
> 
> If you don't really need a design that old, you might be able to find a 
> TMS99532 or Am7910 FSK modem chip.

You're making me feel very old. I used a 7910 the other week..

Somewhere I still have some blank PCBs for the 'Maplin Modem' project. 
This was a 300 baud modem (CCITT tones) using the Motorola 14412 chip  
They couldn't get the demodulator section of said chip to work properly, 
so they added a 2211 or something.

I probably still have a 14412 in the spares box.

-tony