Choke used for smoothing a filament coil which consists of a round central section which has copper wire wrapped around its outside with cloth stripping on top; the centre of the central section is hollow and has a cylindrical metal rod in it; this rod can be raised and lowered by turning a round h…
Choke used for smoothing a filament coil which consists of a round central section which has copper wire wrapped around its outside with cloth stripping on top; the centre of the central section is hollow and has a cylindrical metal rod in it; this rod can be raised and lowered by turning a round handle which sticks out from the top; there are two wires leading out from the bottom and one from the top.