Tom, I'm also in the middle of this process and will be installing a QSI Titan with stereo sound/dual speakers in my U33c.
Believe the extra connection to one of the trucks is to a Hall effect sensor -- probably used by the Lionel Legacy system to get data related to movement, speed, etc. And it connects to the RailSounds board so it is probably timing data used as input to the sound module for some application. Have not really looked in detail at the Legacy sound system to see what specific app it might be for. I would have said the installed speaker was quite adequate. It fact it delivers significant volume -- we could hear it very well at a train show (Amherst show in Springfield, MA) when running TMCC and when I had TMCC running with it at my layout, and without all the noise of the train show floor, it was quite significant. In checking the Lionel IPB for the U33C (available online), it's a 8ohm, 2W speaker. I've left mine in for now and will only replace if needed. Michael At 2/27/2012 08:09 PM, raisinone wrote: >Tom: >The speaker is inadequate - for a Tsunami decoder - especially when >you have already ripped it out with the rest of the TMCC guts. Most >of us at DPV prefer the largest base reflex speaker we can fit; in >this case the DLG8 from Railmaster. The "right speaker" comment >would refer to installing the 8 ohm version the first time, rather >than initially discovering installation of the 100 ohm version >doesn't work so well!! <G> > >If you look carefully inside that truck with the second connector >(wheel sets removed), you will see it is connected to a tiny sensor >that is under the axle with the "sound cam" piece at its >center. Not sure what it was there to "sense", like I said, the >TMCC innards are history now. > >I would suggest you do a search for those shims...! > >Jim > > > >--- In [email protected], "Tom Hawley" <t.hawley@...> wrote: > > > > ----- Original Message ----- > > From: raisinone > > . . . . . . . . . It worked really well when we installed the > right speaker! . . . . . . . . > > > > > > > > > > > > > The speaker it comes with is inadequate? > > < < < < < < < < < > > . . . . . . . . > > the center axle on both U33 trucks has tiny (and I mean small!) > brass shims under the journal bearings. The shims are only 3 or 4 > thousandths and they can stick to the wheel sets you remove so look > for them. Without the shims the drive tends to bind,. . . . . . . . . . . > > > > > > > > > > > > > > Uh-Oh. > > > > And a question: One truck has two wires going to it for > electrical pickup. Fine. But the other truck has the same two > wires, and then two more wires. What purpose do the extra pair of > wires going to that truck serve? > > > > Tom Hawley -- Lansing Mich > > > > > > >------------------------------------ > >Yahoo! Groups Links > > > -------------------------------------------------------------------------------- Michael Greene Dunstable, MA, USA Member: NMRA(Life), NASG, Bristol S Gaugers, The 470 Railroad Club National Assoc. of S Gaugers http://www.nasg.org DCC Corner http://www.dccinfo.com Pine Canyon Scale Models http://www.pinecanyonscalemodels.com Maine Railroads http://www.mainerailroads.org ---------------------------------------------------------------------- ---------- ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
