I just copied this of the Yahoo SoundTraxx group. It is from Bruce at Litchfield Station.
I just received this from Steve Dominguez, SoundTraxx' Chief Engineer:-- We have been monitoring the discussion on the SoundTraxx group with regard to the sudden acceleration observed by some customers and offer the following comments:A frequent complaint of our older decoder designs (LC and DSX series) was that whenever power was disrupted, the engine sound would cycle through the startup and lower notches. In response to this complaint, the Tsunami diesel software was designed so that when track power is restored, the sound algorithms bypass the startup and notching sequences and jump immediately to the corresponding engine notch based on the value of the current throttle setting. Additionally, the decoder will bypass any programmed momentum in CV 3 and 4 and apply a motor voltage also corresponding to the current throttle setting.An un-anticipated consequence of this design is what happens when power is lost during a long acceleration/braking cycle. As has been observed, the decoder will bypass the momentum effects and jump to the commanded speed, which can result in a disturbing speed change particularly if the power glitch occurred early in the inertia cycle. The suggestion to restore the decoder to the speed prior to the power disruption is a good one but unfortunately is not practical at this time for a number of technical reasons related to the way non-volatile memory is handled in the present Tsunami design. From the comments posted, it appears that the effect our customers are trying to achieve is to have the train run/accelerate slowly with the prime mover at full power. There are a couple alternatives ways to achieve this.1) Use manual notching to run the prime mover sound up or down and then use the throttle to directly control the train speed with little or no momentum applied.2) Set CV 116 to a low value (~1 or 2) so the prime mover responds quicker to small throttle changes.In addition, customers having track pickup difficulties might want to consider increasing the size of the “keep-alive” capacitor wired to the decoder to 470uF or even 1000uF in extreme cases (be sure capacitor has a voltage rating of 25 volts or higher). Be aware, however, that increasing the capacitor size too much may cause undesirable interaction with certain command station’s short circuit protection as was observed with some of our competitor’s products.With respect to the other anomalous behavior being reported, we have not been able to duplicate this in our testing but are continuing to investigate possible causes and will report back if and when any new information becomes available.--End comments from Steve.
Go join the group for more about this issue. It is quite a learning experience even though I do not use the Tsunami diesel decoder, only the steam decoder.
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Understandable Rich.
I'm not an expert by any means as I'm a DCC newbie that happens that enjoys and appreciates sound equipped scale locomotives.
I don't own any Tsunamis yet. But the demo I heard from a friend's unit was what I was referring to.
Currently I'm leaning towards the Lok Sound (of which I have one) and the QSI unit. I very much appreciate the sound "upload" features offered.
I do hope that the reported issues with this decoder will be resolved. Soundtraxx's no longer on top of the "sound food chain" in HO anymore, but I certainly would like to see them be successful.
"I like my Pullman Standards & Budds in Stainless Steel flavors, thank you!"
Again, I do not use the diesel Tsunami, only the steam Tsunami. According to what I am seeing in the Yahoo group, there are some issues with the operation of the diesel decoder, which right now "seem" to be operational issues. There is intelligent discussion. Yes, there are one or two of the usual Ranters who want to complain rather than investigate and help. I guess it makes them feel important. Even these forums have those people.
There are some knowledgeable people in the Yahoo group. Maybe you can bring some of that knowledge here since you use the diesel Tsunami. Try to stay away from those who just want to argue.
Rich, David.
Thanks for your info. I'll check out the Yahoo Group discussion on the Tsunami.
Hi AntonioFP45
I do not use the Tsunami diesel, I use the Tsunami steam. I belong to the SoundTraxx Yahoo group that has a lot intelligent discussion concerning the diesel decoder. Bruce of Litchfield Station is there as well as Rick Bell of DCC Installs & Sales. Search for those two companies. Two online DCC installer & suppliers. They have facts and examples of operation rather than opinion. It helps to have different people using the decoders and speakers, comparing notes to solve issues rather than criticize. I think you will enjoy the group as you seem to have an open mind.
http://groups.yahoo.com/group/soundtraxx/
Heard a diesel Tsunami installed in an Atlas EMD Dash 2. My friend took advantage of the equalizer feature and the unit sounded crisp and clear as his baffling was excellent. The horn was smooth and almost as loud as a QSI unit.
My primary criticism was that the "pop-off" sound was very short and not adjustable. On brand new prototype locomotives pop offs ( air let-offs) are short but tend to get longer as their air compressors, governors, and let off valves age.
David,
Your point on Soundtraxx rushing it out of the door is interesting as you had mentioned that before. But all of the features and abilities that Soundtraxx mentioned about the diesel Tsunami are there, especially the equalizer.
Horrible drive? This is the first I heard of this as my friend's unit ran very smoothly. Please, can you elaborate? Did the unit you tested perform poorly? Did you also hear similar feedback from other diesel Tsunami owners?
Go join the group and read yourself. You sound much more experienced than me. Get involved with a discussion. Maybe you will develop a following there. I am giving people information. The are free to look or not look.
There are at least a couple owners of online DCC stores who contribute to an intelligent and usefull problem solving involving the Tsunami and othe zsoundTraxx decoders.
Here is a photo of the install in a Atlas RS-1.
There is a lot of discussion of the Tsunami decoders on the Yahoo SoundTraxx group with explanations by one or two DCC installers. Free to join.
A lot of Tsunami disccusions between members. Probably more discussion than you can get here.
The speed up issues is also discussed. One person so far has found a solution. Go read.
Just found this in a SoundTraxx forum posted by a DCC dealer. I do not use the diesel but I thought some of you might be interested.
SoundTraxx announces new sounds and the long-awaited Atlas Light board Tsunami Decoders!Shipping later in October will be a total of 8 voices in the standard TSU-1000 and the new TSU-AT1000 decoder. The new voices include:V16 ALCO 251 GE FDL-16 Fairbanks-Morse All of these come with 16 era-appropriate horns already loaded in each decoder.Tradittional TSU-1000 Atlas Light board style TSU-AT1000 The TSU-AT1000 includes a 1.5 volt regulator, making installations in Athearn Genesis and similar locos a breeze!