Question - Can one black writable memory module hold both the cab and the base files simultaneously?

1. yes

2. no, just write over the module for the cab update when you update.

One thing, even though you don't connect the second base to the layout, it's possible you cannot have it turned on in the same room as the layout. Only one base per layout, and I have had a completely separate test track pickup the signal from the base on the layout even though the test track was not connected to anything. So I would guess that there is a chance that a second base might interfere with the base you're using on the layout. Just a head's up in case you try having them both on and you run into issues. 

Thank you cjack.  

That information was very helpful.

I read in the manual that for club use to prevent interference the base channels can be set to different addresses, which is what I did.  I will see how that works out because I want to use the second base as a charger for the other cab2.

I will keep an eye out for interference between them thanks to your heads up.

Cheers,

Mike

You do not need to set it to a different channel.  I have 2 Cab 2's, only one is connected to the track.  When my 1st cab2 dies, I just put it back in base and grab the 2nd cab2, turn it on and keep going.  That way there is always one charged and waiting.

Setting two command bases to different channels won't solve the track signal interference issue.  If you're really wanting to solve the track signal interference, turn one base off!  Remember, the channel is for CAB to BASE communication, the real issue with multiple command bases in close proximity is the track signal, which only has one channel, 455khz.

Thanks Sean and Gunrunnerjohn,

I set both Cabs to the base address with the ground connected and just leave the other one connected to charge the second Cab.  No interference problem so far.  

By the way Gunrunnerjohn, I used to work for Moore products in Spring House near Lansdale and ultimately  Siemens there.

I had few friends near there.

Thanks,

Mike

Wow, Moore Products!  I had a very good friend that worked there, Jay Anderson.  Sadly, he passed away a couple of years ago well before his time.  His wife also worked there for a spell, Gina.