EMD's Other AC's

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Train Guy

UP Washy and S.I. Cond.
#1
Can someone explain to me the idea behind EMD's SD38AC and GP38AC line? Im not real sure of what was different or better about this type of setup etc? I have ran an ex DMIR SD38AC and it was by far one of the nicest and coolest units I have ever ran. Its my understanding that these were offered between the straight SD/GP38's and before the dash 2's is that correct? I forgot to mention the MP15AC also. Thanks for any help
 
#2
The AC designation implies that the unit is fitted with an alternator and rectifier instead of the usual DC transmission. You are right about the AC's coming before the straight GP/SD-38 and the dash 2 models. The GP-38AC models were produced in 1971, and the SD-38AC were produced from 6/71-10/71. MP-15AC were produced from 8/75-8/84, and the GP-15AC was produced from 11/82-12/82. This is all according to The Contemporary Diesel Spotters Guide.
 





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