Shielding bobbins with wire wrap ?

Pot Core Bobbins 4 slot pot core bobbins AET offers coil former, bobbin for ferrite pot cores P2616 to produce inductive components with effective magnetic shielding 4 slot toaster Maybe for only 20 watts you could make a 60Hz cut core or any dual bobbin arrangement work for

4 reel slot machine for drying bobbins , armatures , and the like of dynamo machines or motors E Passburg Dated August 13th , 1899 Relates to vacuum drying apparatus for