In article , snipped-for-privacy@privacy.net says... | About 25 years ago, someone was selling a Bowden-cable | style control system for point and signal control. This consisted | of thin white plastic tubing into which slid a springy steel wire | (some form of piano wire?) |
'Point and signal' I assume refers to a model railway use.
Any genuine radio amateur would make their own....
Piano wire can be had in long rolls of many metres in length. It can be had in stainless steel, is very springy and resists bending, though it can be bent.
Piano wire is certainly available and in a number of thicknesses. Look up engineering supply companies.
Continuous thin walled fairly rigid plastic tubing can be had in a number of diameters from 3mm ID upwards. Look up pneumatic supplies wholesalers. Thorite would be a good place to find a good range.