This was a great find at a car boot sale – a K&N Acoustic Coupler. This one looks like it was made around 1974. Didn’t come with any cables – so ive not been able to test.
Click the photo below to see some more photos of the box.
Andy's Retro Computing Collection
Retro & Vintage Computers, old consoles and classic gaming.
Looks not dissimilar to this: http://hackaday.com/2009/05/27/1964-300baud-modem-surfs-the-web/
Its very simular. Im thinking about doing a simular video at some point. I need to get a power cable for it first.