NEW BACHMANN DASH-9 UNBOXED 😁

Last run Dash 9 and SD45 have sintered steel "D cut" wheels..

The more important thing is the D cut or tapered axles...

Sorry, I thought I replied... should be no problem.

Unfortunately Stan is blowing smoke again with partial knowledge.... stoppit Stan, you are not a QSI expert either...

There were 3 different "versions" for Bachmann locos made, and the generic one for Aristo, if you want actual facts Stan. (where are you getting this "information"?)


On J2, since there is nothing connected to the QSI on J2, then none of the stuff stan mentioned on J2 makes any difference. (Stan you must be confusing the Titan, which does have some things connected to j2, I think your knowledge starts after the decoder of interest was developed)

Normally the smoke pins were jumpered (J1 pins 5 & 8) but the Dash 9 manual you have does not indicate what is on pin 5 (this jumpering has been there forever on Aristo).
Also the Bachmann document does not tell you what voltage turns on the smoke unit, and if it is positive true logic.

So, we should check what the Bachmann "jumper plug" that was supplied does for these pins... that is safest. If it jumpers the 2 pins, then your QSI plugs right in for sure. (There were units sold with these pins cut off, a later Aristo version)

So, see what the stock jumper plug does. Worst case you can cut pins 5 & 8 from the QSI decoder, since the internal switch should override anything else. That's your only possible concern with a QSI Revolution/Magnum decoder as you have pictured.

Greg.

The Bachmann "shorting" plug for DC (as shipped) is more complex than the "old style" one that just jumpered J1 in the socket.

Most of the time, the issue is that you have to SEPARATELY provide power to the main board, to power the logic that switches the other lights.

But of course, the QSI you are using pre-dated the Bachman version of the socket, so J2 (where your other lighting is controlled) was not addressed.

(you note that the electronics connected to J1, front headlight, rear headlight do indeed work). This was the situation with the later model K27, C19, etc.

I would take a look at the QSI Titan pinout and see how many of the Titan function outputs match the Bachmann socket.

OK, on the Smoke, the Magnum never controlled the smoke, but the Aristo socket was designed to connect pins 5 and 8. Clearly the Bachmann socket has changed that, and has a logic input on 8 only.

The QSI Titan will control pin 8 on J1, but it will pull to ground, the Bachmann documentation does not give the logic levels for pin 8, but should work if properly designed.

Likewise the Titan has more than enough light outputs, and they are available on J2 pins 8,10,11,12 and on the 3rd connector, but the pins are not exactly the same.

It would be easier to use a Titan, then use the Bachmann adapter board and just use the default Titan terminals, since the Titan has screw terminals that accept the Bachmann wires.

I applaud you sticking to it.

Greg

Yeah, just would like the back to back measurement on the wheels before pulling apart, and to remove one wheel if you can, although pretty darn sure the unit uses the older style tapered axles without the D cut. A magnet to check if the wheels are steel (like previously) would be another good data point.

I would caution you on the TSU-4400, they are marginal in terms of power output, so they are really about 4 amps continuous (most manufacturers rate output current as continuous and also spec stall current, but SoundTraxx has used the stall current, so a 4 amp decoder will quit at 4 amps, i.e. no headroom. Also check you don't get in the area where the DCC track voltage is marginal, early large scale Tsunami's and the Bachmann OEM Tsunami's would freak out at about 20-21 volts (below the NMRA spec of 27) and this was an issue.

This has been somewhat corrected in later firmware, but not confirmed in the large scale units. It was quite an issue in the first OEM SoundTraxx-equipped Bachmann Shays... so just be aware this might be an issue.

My NCE system was modified to put very close to 24v on the rails, and all the Tsunami's I had flipped out... Now my Zimo system does put 24v on the rails too, so I gave up on SoundTraxx in large scale.

Greg

Good to hear no issues with the latest f/w on the 4400's, I had heard they did firmware mods, but not the specific version, and could not confirm they were in the LS Tsunamis...

Since you are consisting, and as I remember mostly flat, that all makes a "low risk" situation for overload. Too bad that NCE would not allow the mod any more.

I actually have a diagram somewhere of the mod...

Was out of pocket all yesterday at a conference (10 gigabyte symmetrical fiber to the home), so missed post #31, thanks!

Funny, after years of undergauge and under spec back to back, now they are over 1.575!

Sorry to ask for one more thing, but the thickness of the base of the flange is of interest since the back to back is so wide. Hard to measure, because you don't want the fillet, so the base thickness of the flange near the tread, but not on the fillet if that makes sense.

How they run will be interesting...

Stay warm, Greg

Yes, appear to meet standard, but that is the reason I asked about flange thickness...

Again, if you read my posts Stan, you would know that the QSI board in question has no extra lighting functions, again you seem to have mixed up the QSI Quantum Revolution with the QSI Titan.