sambear,
The Tech II is a DC power pack. It won't work with DCC.
The Digitrax system should have a power booster (I think built in with that model - I don't have Digitrax).
You should have plenty of power with a single booster. It's not the run of the track - but more how many locomotives and other power draw components that matters. With DCC you can have 'dozens' of locomotives running all at the same time. You should spend a LOT of time looking through the wiring for DCC site (
http://www.wiringfordcc.com/). Look out though, that site has some information that technology has overcome since it was first presented. Join up with one or more of the DCC specialty web forums for DCC issues - there are several and one especially for the Digitrax system.
For wiring, you should STRONGLY consider a POWER buss under the layout using AWG #12 wires. I prefer the stranded #12 - but using regular household wiring with solid #12 works just as well.
Wire drops from the track to the power buss can be #22 or even #24 wires. The drops need to be short (6" - 8") and I prefer the solid wires for the drops as they are easier to handle and solder to the rails. You ideally want a drop wire from EVERY piece of rail. Many will argue that one every 6 ft (two sections of flex track) is all that's needed. I simply disagree, for reliability, never rely on rail joiners for electrical connection.
You can remove the wire insulation around small sections of the power buss wire and solder all the wire joints - or - you can use the scotch 'suitcase connectors' for connection. The Scotch connectors crimp and make a fine connection (especially with the stranded #12).
For DCC and wiring - go to the specialty forums.
-ed-
_________________
-ed mccamey-
COSLAR RR -
http://www.coslar.us/NMRA Standards and Conformance Department
PROTO & FINE Scale Coordinator
I estimate I have about 5 pounds of coupler springs somewhere in the vicinity of my workbench.