Thanks - I'll do that on the next power board I get. 
If you wired it the way you indicated, how did you blow a power board?
YIKES!
You're right, the DC common on that board is NOT frame ground. 
Yeah, I figured that out really quickly the hot and smokey way... 
New board will be here Thursday or Friday...
That is why it said DC common, not AC common
G
I think with the older TMCC stuff having frame ground and DC Common the same has fooled some folks.
And now all done! Amazing how one little jumper makes a big difference!
Now on to changing the sound in my upgraded Santa Fe PS1 to Electric RR TMCC Northern (to use the Railsounds 5.0 3751 chipset).
Sorry for the shakiness of the videos.
On the test track:
On the Lower Main:
What was the RS board you used for the cab forward?
I used the Railsounds 5.0 chipset from the Lionmaster Cab Forward since it was the newest model before the Legacy version.
I just looked, and they have a RS5 #4294, that's the cab number of the brass one in the closet, so I think I'll try to bag that one.
I just ordered the Santa Fe Chipset and the C&O F-19 #490 chipset to upgrade the sound in my C&O Yellow Belly.
I'm actually using one of these with the magnet and reed switch now. Does the chuff switch connect to the DC Common, not the 5V DC? The old ERR diagrams for the RS4E upgrade board seem to show so.
If you are using the Cruise Commander with pretty much any RailSounds variant, you don't need any connection to the audio board chuff switch. Just pipe the chuff into the Cruise Commander's chuff input, it'll be delivered to the audio via the serial link. That's the way all my upgrades work.
I'm using the AC Commander in this case.
Same comment, it works exactly the same way.
Because the AC Commander doesn't have the chuff pin where the Cruise one does.
Love this thread, next upgrade I'll check out RS5.0 options
Sorry, I forgot that little detail. Just wire it to Pin 17 of the R2LC socket, same effect. I don't know why they assumed you needed two antenna connections on the AC Commander, that was kinda' stupid IMO.
Pin 17 is the chuff input, it's simply pulled to frame ground to generate the chuff.
I should have remembered this, I just did a couple of AC Commander steamers. 
RS5.0 still may not be purchase without turn in. So you may want to ask before all your hopes get up. Most are contact Lionel and more and more parts are now turn in required. G
