3 Dec
2008
3 Dec
'08
9:27 a.m.
Are delay lines of this type subject to errors induced by vibrations
or shock? If so, would heavy handed typing on the calculator's keys
cause problems?
The delay line wires are well-isolated via silicone pads that damp out
external vibration, and isolate the coils of wire from touching each
other. Heavy-handed typing isn't going to cause any troubles, although
a shock like lifting and dropping the machine (generally not a good
thing for glass-based display elements like Nixie tubes or CRT's) could
definitely induce errors. Ambient vibration typically wouldn't cause
problems, such as use aboard a ship or vehicle, except in extreme
conditions. For extreme environments, a calculator using magnetic core
memory or flip-flops would have been a better choice.
Rick Bensene
The Old Calculator Museum
http://oldcalculatormuseum.com