A parallel coil acts like dual coils in the space of a single coil.
Parallel mounting is dual coils where both are mounted + to - posts
Series dual coils are two coils where one coil is attached to the + post only and the second coil is attached to the - post only, and the two free ends are connected or simply built with an uncoiled section between the coils (very rare setup).
Parallel coils mounted in parallel are essentially quad coils, I've seen up to 9 strand parallel coils built. Not my cup of tea though.
Maurice
Parallel mounting is dual coils where both are mounted + to - posts
Series dual coils are two coils where one coil is attached to the + post only and the second coil is attached to the - post only, and the two free ends are connected or simply built with an uncoiled section between the coils (very rare setup).
Parallel coils mounted in parallel are essentially quad coils, I've seen up to 9 strand parallel coils built. Not my cup of tea though.
Maurice
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