Multiple-unit-rectifier motive power - Inductive co-ordination considerations on the New York, New Haven & Hartford Railroad

WHEN the New York, New Haven & Hartford Railroad ordered ten ignitron locomotives and 100 rectifier multiple-unit (MU) cars for use in their electrified territory, the communications engineers of the New Haven Railroad and of the Southern New England Telephone Company (SNET) were concerned with the possible increased levels of noise that might be encountered on their exposed lines.