Hi,
I successfully chipped several of my locos awhile back- o71 , 141 and 201 class using Bachman 36-557 chips. Recently, I bought another 5 chips of the same kind but was only able to successfully program the 141 class locos and no luck with the 071 class. I use prodigy express to program. The two 71s (NIR 112 and IR 73) run fine in DC mode. I switched the chips to the 141 and they programmed just fine. I could get the Murphy 071 chip ( extra functions but more expensive) but I don't understand why the 36-557 chip does not work on the 71 class. Anybody have this experience?
Thanks, Brendan