Re: the early teletype

On 15/11/2024 01:48, Lawrence D'Oliveiro wrote:

On Fri, 15 Nov 2024 00:34:06 +0000, David Wade wrote:
 

You used a tuning fork with a thin "slit" attached to each leg. The
slits were arranged so they opened and closed as the fork vibrated
creating a tuned shutter.

 Ah, of course. The “Bulova Accutron” method of accurate timing
calibration, before the technique was obsoleted by cheap quartz crystal
oscillators. ;)

Yes, I own a couple of Accutrons. Always interesting. These days I use a digital tacho thing that refelects off a reflective stick on strip to time my TTYs
Dave