[Amps] Filter Chokes

[Mike Lucas]

     I'm trying to characterize two filter chokes from 4x1 amps, other 
than big and heavy. Can someone
suggest a procedure, literature, or visual methods to identify what I 
have? Am I safe in assuming that
they are swinging chokes? Originally from W4GD supplies, weight is about 
25 Lbs each, although they
are of different construction.

Thanks, Mike W5CHR Memphis