Howes Roller-Inductor  This is the roller inductor that I use on my CR-5 Crystal Radio sets.  Those that enjoy there hobby building crystal sets and experimenting may find this item of interest.  It consist of 105 turns of #24 copper wire around a 1-1/2" coil form that is 3-3/8" long.  I think the picture shows the rest of the story.  I can't give you any exact inductance values, but seems to be ideal for crystal sets or possibly tuners.   Thanks for looking.  

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