Show low loss space wound coil gives results the following Is a description ot of a coll coil having very low electrical losses and sufficient mechanical strength to enable it to be used under the most rigid conditions this coll coil eliminates two undesirable features found la in other popular low loss colls coils viz the danger of short circuiting turns as in tho the bask basket et weave type and the high distributed capacity as found in the pickle bottle type any size wire between no 12 and 20 will be satisfactory for winding the coll coil however it is IB recommended that Ettic efficient kent form of I 1 inductance coil space beaco wound self supporting no 16 10 or 18 be used if possible obtain a bottle whose diameter Is equal to that of the coll coil to be constructed from a piece of gum paper tape cut out three strips 6 10 inch wide and approximately three times cis as long as the finished coll coil Is to be several rubber hands bunds will come in handy here to hold the tape strips on tho the bottle while the wire la Is being wound on the turns should be spaced by a string which Is wound on along with the wire ordinary wrapping twine will be satisfactory for the smaller wire but so something bigger should be used for the larger elzea when the correct number of turns have hare been wound on fasten the end of the wire by another rubber band and remove the string apply a thick coat of on the wire over the tape ape strip allow this to dry and put on a second thin coat moisten the tape not covered by the wire and and press down while it Is still sticky when this dries break the bottle and remove the completed coll coil fadlo news |