09-19-2015, 05:47 PM
No, it does not matter which primary wire goes to which 41 plate. Each half of the primary should have the same number of turns.
The reason why the resistances are different is because of how the transformer is wound. The primary is basically wire wound on a bobbin. At the beginning of the winding, the bobbin diameter is small. As the winding continues, the diameter increases as more wire is wound, so for the same number of turns a longer length of wire is needed. Since the second half of the winding has more wire for the same number of turns, its resistance is higher than the first half.
The way expensive transformers get around this is called a bifilar winding. Both halves of the winding are wound simultaneously as a pair of wires, so for the same number of turns the wire lengths are equal and therefore the resistances are the same.
The reason why the resistances are different is because of how the transformer is wound. The primary is basically wire wound on a bobbin. At the beginning of the winding, the bobbin diameter is small. As the winding continues, the diameter increases as more wire is wound, so for the same number of turns a longer length of wire is needed. Since the second half of the winding has more wire for the same number of turns, its resistance is higher than the first half.
The way expensive transformers get around this is called a bifilar winding. Both halves of the winding are wound simultaneously as a pair of wires, so for the same number of turns the wire lengths are equal and therefore the resistances are the same.
