Another question regarding the AC regulator

you need to give us a engine item number for your Lionel or we cant help you! 6-2535224 or whatever number yours is!

Alan

I think only Lionel knows what the differences in the programming of the various regulators is, and even they may have lost that documentation.  Some of the regulators are programmed to shutdown the smoke heater when the locomotive stops, many early Legacy steam locomotives with the modular boards didn't have smoke fan at idle, so instead of doing it right, they just turned off the heater of the smoke unit.  The 691ACRG103 is one of those that has that behavior, so I presume the 691ACRG101 did as well.

The ACRG101 is now obsolete and is replaced by the 103.

Yes, and note that I already mentioned that the 103 version also has the same behavior.

John,

Do you think a person could use a S04 code regulator in place of an original S03 code unit?  Would it provide better overall control or does the software conflict?

As always, Thanks.

I haven't actually swapped one out, but I'm pretty sure it'll function in some manner, don't know what different operating characteristics it brings to the table.  As I said, Lionel provides ZIP information on the differences in the various code versions.

I put these all on my test board with the same R2LC or R4LC driving them to test them, they all seem to function within their limitations.

Thanks John.

Just to see if I get a response,  I asked Lionel service folks the same question. I'll let you know if I get a response.

Best, Dave

Time will tell...  I won't tell you what my prediction is...