The world of the domestic radio has now moved far away from the use of tuning condensers (as they were known at the time)with wide-spaced vanes.
Suggesting an old valve radio as a source of such is increasingly not viable. (Mind you, most of those of a CB mentality will be buying auto tuners with their "C"heque "B"ooks)
As they are essentially assemblies of metal, has anybody had a go at manufacturing one?
I perceive the difficulty to be machining the grooves to hold the vanes, which I presume are held in by expanding the shaft under heat and then cooling the whole lot together?