Welcome to the forum   
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Share
Options
View
Go to last post in this topic Go to first unread post in this topic
Offline AshleyH  
#1 Posted : 15 February 2016 11:33:54(UTC)
AshleyH

United Kingdom   
Joined: 15/02/2008(UTC)
Posts: 650
Location: Bournemouth, Dorset
With my gradually improving sight I have, quite literally, been dusting off my Marklin HO collection which has been stored in boxes for many years.

The other week I unboxed my 37990 Big Boy love and attempted to run it on a small oval of track. The loco did not run very well, so a friend helped me to strip it down, clean the brass contacts and add a little light lubrication, as per the instructions.

The loco now runs superbly once again, but there is a problem with the main chuffing steam loco sound effect. It starts out OK, but then at random the chuffing goes out of sync to the motion of the loco and makes almost a machine gun sound. This first version of the Big Boy has a pulse generator fitted to the front driving axle, later versions 37991 onwards do not have this. So my friend stripped and contact cleaned the magnets and sensor, but no change.

So after a bit of 'Googling' we found some information on the Stummi forum. It seems the sound decoder in the 37990 is not compatible with the 60213/60214 and 60215 Marklin Central Stations. I think the last time I ran the loco, maybe 9 or 10 years ago (yes really!) I would have used the Marklin 60212. Marklin service were kindly offering to upgrade a customer's 37990 for just over 300 Euros. However, mine was a gift and I would like to keep it in original condition. I also do not like the Marklin Service price and that was a few years ago!

So having no other digital controllers capable of generating the Motorola format, it is my intention to buy an additional controller as cheaply as possible that will operate my Big Boy correctly. There is mention of it working correctly with a Marklin Mobile Station, but which version? 60651/60652 or the later 60653? Does any member know the answer please? Also, I guess the 6021 or an Uhlenbrock Intellibox would be fine.

I already have a 60653, but not the 60113 track connection box, so that would probably be the cheapest option, but I would like to know if it works first, or whether I need to seek out one of the earlier Mobile Stations.

I hope this information will prove useful to other 37990 owners who may think their loco has developed a fault.

Best Regards
Ashley
thanks 5 users liked this useful post by AshleyH
Offline H0  
#2 Posted : 15 February 2016 11:52:44(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 13,505
Location: DE-NW
Hi, Ashley,

Just a guess, but maybe worth a try: you can set the CS2 to MM only (DCC and mfx will be disabled). This could help.

Do you use a switching-mode power supply with your CS2? Trying a transformer instead (16 V AC) could also make a difference.

I don't have the 37990 and cannot make any tests. Some CS2 seem to have problems with the 37990 while others don't.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 4 users liked this useful post by H0
Offline AshleyH  
#3 Posted : 15 February 2016 12:56:50(UTC)
AshleyH

United Kingdom   
Joined: 15/02/2008(UTC)
Posts: 650
Location: Bournemouth, Dorset
Hi Tom,

Thanks for your suggestions. I do use a switching mode power supply., so I will try my Roco 16v transformers. It may make a difference! I have already tried just setting the data format to MM only, it was a good idea, but did not solve the problem. I am more hopeful about the 16v transformer though, I will let you know when I have done the necessary wiring...

Best Regards
Ashley
thanks 2 users liked this useful post by AshleyH
Offline AshleyH  
#4 Posted : 15 February 2016 23:49:56(UTC)
AshleyH

United Kingdom   
Joined: 15/02/2008(UTC)
Posts: 650
Location: Bournemouth, Dorset
Hi Tom,

Well, this afternoon I went and found the box for my 60215 hoping that the cable with two wires at one end and the 4 pin plug at the other was still in the box, it was. So I connected the cable to the 16v AC outputs of my Marklin 6647, but sadly no difference, the same jumbled up chuffing sounds.

This evening I borrowed a friends 60652 Mobile Station, complete with a 60052 AC Transformer and the C track connection track. The Big Boys sound was perfect with this setup.
So I am lead to the conclusion that the MM signal generated by my CS2 is in some way incompatible with the 37990, and pissibly a few other Marklin locos. And it doesn't seem to matter what power supply you use with the CS2, though I have yet to try the 60052 with my CS2.

Many Thanks
Ashley
thanks 3 users liked this useful post by AshleyH
Offline dickinsonj  
#5 Posted : 16 February 2016 01:11:22(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Ashely,

I have had that same problem with my 37990 and I first had it while I was still running it under the first generation Marklin Central Unit (6020). When I removed the plastic cover over the axles where the signal generator is located, it had collected excess oil from oiling the drive wheels. I cleaned up the oil, cleaned the disk on the front axle that generates the signal and the sensor located above it. It did the out of beat sounds less often after that, but it still did it. It did not do that at all when it was new and running with the same digital setup. That was over 10 years ago and shortly after that my control units that went with that Central Unit stopped working. Since then all of my Marklins have also been packed away until just last month.

I finally bought a CS2 last December and when I ran the 37990 the sound was almost perfect with just the very occasional erratic sound. I cleaned up the oil in the area again (still too much oil after 10 years storage!) and now it works fine with the CS2. Mine runs as beautifully as ever. Could you be more specific about what contacts your friend cleaned? That may be something that I need to keep an eye on as well.

I understand that my experience is not consistent with what you have seen with your 37990 but I definitely had exactly that issue many years before I ever had a CS2. I assume it is related to the signal generating disk being affected by the wheel oil. At least that appears to be the situation with my 37990. That is my number one favorite Lok although I doubt that I would pay that cost to have Marklin repair it, even if that is feasible from the US these days.

Good luck getting that sorted out and let us know what happens.

Jim
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
thanks 3 users liked this useful post by dickinsonj
Offline AshleyH  
#6 Posted : 17 February 2016 08:30:34(UTC)
AshleyH

United Kingdom   
Joined: 15/02/2008(UTC)
Posts: 650
Location: Bournemouth, Dorset
Hi Jim,

The contacts that were cleaned were the brass strips that return the current through the axles. I think they may have oxidised slightly in the years of storage and non use. The loco was tested with a multimeter and a few of the axles were not returning the current to the rails. But fine running after cleaning.

My chuffing sound issue is now definately only diwn to some sort of incompatibility with the 60215 CS2, I guess the way it generates the MM2 data format



I am thinking of buying a 60113 connection box for my existing 60653 Mobile Ststion, but it would be helpful to know if any forum members have run a 37990 Big Boy with the current generation Mobile Ststion and whether or not the sound works correctly?

I thought about buying one of the earlier Mobile Stations like my friend lent me, but I don't really want to buy older, less reliable technology.

Many Thanks
Ashley

thanks 2 users liked this useful post by AshleyH
Offline dickinsonj  
#7 Posted : 17 May 2016 20:53:53(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Ashley,

I recently made a discovery regarding the 37990 Big Boy and the problem with the operating sound synchronization.

If I operate the Big Boy on a circuit controlled directly by my CS2 (60215) the sound quickly loses sync and I just turn if off. But if I operate the 37990 from a 6015/6017 booster connected to the port on the bottom of the CS2, the sound is fine. That suggests that the data is indeed corrupted in the 60215 data stream but that something happens when it is ported to the old style boosters that makes it work correctly.

I write software of this nature professionally and one of these days I will get the source code and figure out how this goes wrong. I am guessing that it is related to both decoders in this model presenting under just one address on the CS2. The first decoder controls the lights and motor and the second decoder controls the sounds. My other two decoder models let the the decoders present separately and I have to control the second decoder under a second address. Even though the decoders in the 37990 are on consecutive addresses they are both accessible under the address of the first decoder. However Marklin made that happen seems to corrupt the sound signal and it should be fixable in software. However that would require recompiling new software with my change every time the CS2 is updated.

In the short term I will probably just confine the Big Boy to a track controlled by the old style boosters, under which it works perfectly. I have tested my hypothesis multiple times with the same result, so I think I have a kludge that will get me by. If I come up with a better solution I will post it on the forum. Maybe Marklin would like to buy my solution - I can be easily paid in high quality Marklin equipment. Cool

I hope that you have found a workable solution to your problem.

Regards,

Jim

Edited by user 18 May 2016 01:01:32(UTC)  | Reason: Not specified

Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
thanks 2 users liked this useful post by dickinsonj
Offline H0  
#8 Posted : 18 May 2016 08:07:56(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 13,505
Location: DE-NW
Originally Posted by: dickinsonj Go to Quoted Post
That suggests that the data is indeed corrupted in the 60215 data stream but that something happens when it is ported to the old style boosters that makes it work correctly.
Nope, the boosters emit the same data stream - just at a higher voltage. 16 V AC give more than 20 V track voltage while 19 V DC give about 18 V track voltage.
The MS2 will give about 16 V track voltage from 18 V DC.

mfx may increase the problems, but mfx is also present in the 6017 data stream - as it is the same data stream.

Originally Posted by: dickinsonj Go to Quoted Post
Even though the decoders in the 37990 are on consecutive addresses they are both accessible under the address of the first decoder.
Nope. F5 through F8 are not sent to the first address, they are sent as F1 through F4 to the second address. Simple address translation in the CS2, no "decoder magic".
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 1 user liked this useful post by H0
Offline dickinsonj  
#9 Posted : 18 May 2016 14:00:28(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Originally Posted by: H0 Go to Quoted Post
Nope, the boosters emit the same data stream - just at a higher voltage. 16 V AC give more than 20 V track voltage while 19 V DC give about 18 V track voltage.
The MS2 will give about 16 V track voltage from 18 V DC.

mfx may increase the problems, but mfx is also present in the 6017 data stream - as it is the same data stream.

Well, I assumed that it was the same data stream - as it should be. But the sound definitely works properly with the 6017 booster and not with the 60215. I don't see why the voltage difference should effect this function's operation but I suppose that is possible. Perhaps someone can explain how this voltage difference could cause this error in the sound.
Originally Posted by: H0 Go to Quoted Post
Nope. F5 through F8 are not sent to the first address, they are sent as F1 through F4 to the second address. Simple address translation in the CS2, no "decoder magic".

I was trying to not be too technical, since it seems to put some people off. That is what I meant by "decoder magic" - the CS2 is clearly doing the address translation for the second decoder. Debugging from small amounts of info can often lead you astray, as I well know.

When Ashley suggested that the CS2 was at fault it didn't make sense to me either. The operating sound function is binary - the sound is either on or off, which is all the CS2 needs to send, since the actual sounds are stored in the decoder. That would be normal practice for a CAN bus system like this, so I assume this is the case for this system. But now I wonder if most iterations of the data message have the operating sounds "on" but occasionally it interjects a message with that bit "off", which might cause the stutter.

The decoders are on adjacent addresses but I don't know how the CS2 determines that this is a case where F5 - F8 should be send as F1 - F4 on the next consecutive address. Maybe it does that in any case where there are more than 4 functions but it is not an mfx decoder? When I first placed the 37990 on the programming track I was surprised to see all 8 functions show up under one address and I wondered how the CS2 determined that this was a special case.

I also wondered what would happen if I remapped the decoders, but I was not sure how to do that since the CS2 only presents the address of the first decoder. Both decoders are still on the factory setting, 40 and 41, but I assume it would work with any two consecutive addresses.

So I bow to your greater knowledge of this system, but I still have the problem with the operating sounds on my very nicest lok and I don't know what I can do to fix it! Confused
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
Offline H0  
#10 Posted : 18 May 2016 15:31:53(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 13,505
Location: DE-NW
The MM protocol is limited to F0 through F4. So for MM protocol and F5 through F8 the next address will be used automatically. This is Encoder magic (the CS2 is the Encoder, not the Decoder).

If you have to MM locos with consecutive address and you define F5 through F8 for the loco with the lower address, then this entry in the CS2 will control the functions of the other loco.


Re effect of higher/lower track voltage:
When the first MäTrix mfx decoders came up in 2009 there were some complaints about distorted sounds. Märklin added buffering capacitors to the locos that were sent back and also to locos issued later.
While the CS2 does not emit power to the track, the power stored in a capacitor on the decoder must provide current for the sound. The voltage of the capacitor drops while it gets depleted.
With higher track voltage, the minimum voltage from this capacitor (in a semi-depleted state) will still be higher. This may make the difference between normal sound and disturbed sound.

So maybe a "power pack" (capacitor, resistor, diode) would be enough to cure the problems. In my opinion it is a good sign that it works when the 6017 is involved.

The Big Boy 37990 has two decoders - one with 10 DIP switches, one with 8 DIP switches. While it makes sense to use consecutive addresses, you can also set non-consecutive addresses.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 1 user liked this useful post by H0
Offline xxup  
#11 Posted : 18 May 2016 16:06:12(UTC)
xxup

Australia   
Joined: 15/03/2003(UTC)
Posts: 8,946
Location: Australia
Originally Posted by: H0 Go to Quoted Post
... but mfx is also present in the 6017 data stream - as it is the same data stream...


Okay there might be something subtle in here AND it has been many years since I tried it, but I seem to remember using my eCOS 1 with a 6017 booster and trying to drive a mFx loco into the boosted area - where it stopped.. My understanding was that the 6017 could not retransmit the mFx signal onto the track. This is why I bought the eCOSBoost when it came out some time later.
Adrian
UserPostedImage
Australia flag by abFlags.com
Offline H0  
#12 Posted : 18 May 2016 16:37:12(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 13,505
Location: DE-NW
The 6017 transmits mfx from the controller to the loco, but not the other way around. You cannot register or edit mfx locos on the 6017 section, but you can drive them.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
Offline Armando  
#13 Posted : 19 May 2016 06:05:19(UTC)
Armando

United States   
Joined: 21/07/2003(UTC)
Posts: 1,324
Location: Houston, Texas
Hi all,

I've too experienced exactly the same erratic, machine-gun-like, sound from my 37990 the first time that I ran it using my CS2. I thought that the sound decoder had become damaged after having had the locomotive stored, and not run for over 10 years. I tried operating it with my old faithful 6021 Control Unit, and the sound operation was perfect, just like before.

I still haven't tried operating it with a MS2 mobile station, though.
Best regards,
Armando García

Offline dickinsonj  
#14 Posted : 19 May 2016 13:44:09(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Originally Posted by: Armando Go to Quoted Post
Hi all,

I've too experienced exactly the same erratic, machine-gun-like, sound from my 37990 the first time that I ran it using my CS2. I thought that the sound decoder had become damaged after having had the locomotive stored, and not run for over 10 years. I tried operating it with my old faithful 6021 Control Unit, and the sound operation was perfect, just like before.

I still haven't tried operating it with a MS2 mobile station, though.

Yes, this appears to be a problem shared among all of the 37990's, which is too bad since it is such an amazing locomotive!

Ashely mentioned that Marklin had modified some to correct this problem but I have not yet found any details about this modification.

For now I am just glad that mine seems to operate correctly running under one of my old boosters - that gives me a reason to keep some of them around as I change over to 60174 boosters and switched mode power packs. You might be fine if you use yours with your MS2.

Regards,

Jim
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
Offline dickinsonj  
#15 Posted : 24 March 2017 02:32:12(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
I now have some free time to update a few old threads, and this time I have some very good news to share!

For a variety of reasons I finally bit the bullet this year and devised a functional power bus that I could install under my C track seasonal layout. My mainlines are approximately 18 meters long and I really had no choice if I wanted things to operate properly. I have another older thread where I asked for info on how I might do that and I will update it soon with some pictures of what I did.

I have found that everything works much better now with fewer amps consumed and no dead spots anywhere on my mainlines. People have posted in other threads about other issues that they thought might be caused by not having a smooth, consistent power supply. That made me wonder if the sound problems with my 37990 might be due to that as well. I just got that loco out and running this week and I was very happy to find that the operating sound now works perfectly in all of the areas where I have my power bus installed. Since that is everywhere except my small yard, I can enjoy the original, if basic sound of that loco for the first time in many years. BigGrin

Apparently that model's decoder is just very sensitive to any areas of weak signaling due to a poor power distribution which resets the operating sounds and screws up the chuff sequencing. So there was not really anything wrong with the loco itself other than that and a good electrical supply fixes the problem. Adding a capacitor might be a good idea as well, but for now it is working just fine.

I do find it curious that the problem was worse with my CS2 than with the old boosters (6015/6017) that I used last year, but I am no longer using anything but 60174 and 60175 boosters. So here is more proof of how essential a power bus is to a layout that runs well, even if it is just a temporary one.

And as a bonus I can use my 37990 as my signal quality tester as I build out my real layout in a few years. Cool
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
thanks 4 users liked this useful post by dickinsonj
Offline H0  
#16 Posted : 24 March 2017 09:05:10(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 13,505
Location: DE-NW
Hi!
Originally Posted by: dickinsonj Go to Quoted Post
I do find it curious that the problem was worse with my CS2 than with the old boosters (6015/6017) that I used last year, but I am no longer using anything but 60174 and 60175 boosters.
When the load is low, the 6017 will provide a higher track voltage than the 60174.

Thanks for the feedback. Everybody building a permanent layout should be aware that more feeder tracks can solve some issues.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 3 users liked this useful post by H0
Offline AshleyH  
#17 Posted : 24 March 2017 10:12:04(UTC)
AshleyH

United Kingdom   
Joined: 15/02/2008(UTC)
Posts: 650
Location: Bournemouth, Dorset
An interesting post. After trying both switch mode and traditional transformers and getting the same issues with my 37990 and CS2 60215, I had come to the conclusion that the problem is the way the CS2 generates its data format.

One thing I will try later is running my CS2 with the 100VA PSU in 5 Amp mode. However, if voltage or current are the issue, then it puzzles me that the Big Boy works perfectly when driven with a MS1 or MS2 with a PSU of only 1.9 Amps or lower......

Another possibility is has this issue been resolved by a recent firmware update to the CS2.

I'll report back after more testing.....

Best Regards
Ashley
thanks 1 user liked this useful post by AshleyH
Offline dickinsonj  
#18 Posted : 24 March 2017 12:49:16(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Originally Posted by: H0 Go to Quoted Post
Hi!
Originally Posted by: dickinsonj Go to Quoted Post
I do find it curious that the problem was worse with my CS2 than with the old boosters (6015/6017) that I used last year, but I am no longer using anything but 60174 and 60175 boosters.
When the load is low, the 6017 will provide a higher track voltage than the 60174.

Thanks for the feedback. Everybody building a permanent layout should be aware that more feeder tracks can solve some issues.

Hi Tom,

You mentioned last year that the main difference between the two boosters was voltage but I could never figure out exactly how that might cause the problem.

It was a real wake up call to me about how important it is to have a power bus with lots of feeder wires if you want things to work properly. It did take a while to hammer that lesson into my thick head. It was also instructive on how difficult it can be to pin down the specific cause of a subtle digital issue like the sound problems with that loco. I was provided a lot of good input here on the forum though and I got there in the end. BigGrin
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
Offline dickinsonj  
#19 Posted : 24 March 2017 12:56:30(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
Originally Posted by: AshleyH Go to Quoted Post
An interesting post. After trying both switch mode and traditional transformers and getting the same issues with my 37990 and CS2 60215, I had come to the conclusion that the problem is the way the CS2 generates its data format.

One thing I will try later is running my CS2 with the 100VA PSU in 5 Amp mode. However, if voltage or current are the issue, then it puzzles me that the Big Boy works perfectly when driven with a MS1 or MS2 with a PSU of only 1.9 Amps or lower......

Another possibility is has this issue been resolved by a recent firmware update to the CS2.

I'll report back after more testing.....

Best Regards
Ashley

Hi Ashley,

Some obscure difference in the data format from the CS2 was my first guess as well. I am running the latest software on my CS2 and the sound will still lose synch in areas without a power bus, so I don't think the difference is the CS2.

Please do report what you find after more testing. Debugging something like this can be very difficult and I wandered down multiple wrong paths before finding my solution. Every time I wandered off into the weeds with some half formed theory though, Tom would pull me back on track with some helpful insights. There is a wealth of good information available here on this forum and I don't think that I could handle this stuff on my own without that.

Good Luck!
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
Offline Incognito  
#20 Posted : 16 April 2017 18:21:28(UTC)
Incognito

United States   
Joined: 19/04/2015(UTC)
Posts: 15
Location: Maryland, Chevy Chase
I just acquired a Big Boy - 37990 and also noticed the problem with the sound. My CS2 is at the latest firmware version. I use a 60174 boosters for the track, but when I replaced it with an older 6017, the sound was perfect. That really eliminates the CS2 and the locomotive and only leaves the 60174 as the culprit.
Offline dickinsonj  
#21 Posted : 16 April 2017 22:48:46(UTC)
dickinsonj

United States   
Joined: 05/12/2008(UTC)
Posts: 1,170
Location: United States
I have another sound update on my 37990.

As I had reported earlier, it has been working perfectly on all on my circuits as long as they have a power bus. This year they are supplied by the booster in my CS2 and a 60174 and a 60175 booster. So the sound issue seemed to have been solved, at least for a while. But eventually there was another sound problem and I got the chance to learn one more detail about this situation. That train was parked for about 10 days on one of my main lines (running from the 60215) and when I got around to running it again the sound issues had resurfaced. They were not as bad as what I had seen in the past but they were definitely there.

Eventually I noticed that the problem only occurred when the loco was in the section where it had been parked for 10 days. That loco pulls 25 wagons with lots of newly oiled axles so I decided to try cleaning just the track where it had been sitting. After cleaning that track segment it is now back to working perfectly again. I have run it a good bit over the last 2-3 weeks without a single sound problem. My latest theory is that the decoder in this model is extremely sensitive to ANY disturbance in the digital signal, even just the signal degradation that dirty track can cause. A new decoder would no doubt solve the problem and a capacitor might fix it also, but for now I am leaving it alone.

Originally Posted by: Incognito Go to Quoted Post
I use a 60174 boosters for the track, but when I replaced it with an older 6017, the sound was perfect. That really eliminates the CS2 and the locomotive and only leaves the 60174 as the culprit.

At this time last year I was convinced that there was some data format difference between the 60215 and the 6017 which caused this issue. But all of my 6015/6017 boosters are now retired and my 37990 sound is working perfectly on all of the newer circuits as long as there is a power bus and the track is clean. I think the problem is less prevalent with the 6017 because of the voltage differences between the older and newer boosters as Tom suggested to me last year. I have seen the problem when it is on circuits powered by a 6020, 60215, 60174 and 60175, so I don't think it is the digital output from any particular booster causing this problem but rather a combination of track voltage and having a good, clean power supply.
Regards,
Jim

I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
I have models from Era I to Era VI, but I try to focus on Eras I & III. Whoops, that one got away from me. Let's just say I focus on cool trains, regardless of the particulars :-)
So many trains and so little time.
Offline Incognito  
#22 Posted : 20 April 2017 21:10:16(UTC)
Incognito

United States   
Joined: 19/04/2015(UTC)
Posts: 15
Location: Maryland, Chevy Chase
I will clean the tracks again since I havn't done it in a while and see if that resolves the issue. Thanks.
thanks 1 user liked this useful post by Incognito
Users browsing this topic
OceanSpiders 2.0
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

| Powered by YAF.NET | YAF.NET © 2003-2019, Yet Another Forum.NET
This page was generated in 0.862 seconds.