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Offline wally45  
#1 Posted : 10 September 2020 14:26:05(UTC)
wally45

United Kingdom   
Joined: 24/08/2017(UTC)
Posts: 4
Location: MIDDLESEX
I have streamline loco with 60760 conversion chassis very quite, metal body makes ringing sound when fitted,be grateful for any suggestions Phil.
Offline mbarreto  
#2 Posted : 10 September 2020 17:36:30(UTC)
mbarreto

Portugal   
Joined: 18/02/2008(UTC)
Posts: 951
Originally Posted by: wally45 Go to Quoted Post
I have streamline loco with 60760 conversion chassis very quite, metal body makes ringing sound when fitted,be grateful for any suggestions Phil.


Hello,
Tthe description you made has very few content. A photo of the locomotive chassis (locomotive without the metal body) could help we understand what is wrong.
If you also have a diagram of the connections you made, it could be useful.



Mostly Märklin H0.


Offline JohnjeanB  
#3 Posted : 10 September 2020 18:52:50(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,056
Location: Paris, France
Hi
I have a similar problem with this loco 3489 A streamlined BR 03 from the DRG. I have converted it with a 60760 kit
3489 BR 03.jpg
The loco runs very well but indeed, the metal casing acts like a bell to amplify the motor noise.
This is too bad as the loco looks very nice and I was considering to install a sound decoder in it but unless some of our friends comes with a suggestion to dampen the noise, it will stay like this.
Note: Yes I could set the sound to maximum volume but as I operate 31 sound locos at the same time it would be a cacophony (very un-attractive)
Please help
Jean
My lay-out videos
latest vid
humping yard
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Offline DaleSchultz  
#4 Posted : 10 September 2020 20:11:06(UTC)
DaleSchultz

United States   
Joined: 10/02/2006(UTC)
Posts: 3,454
have you tried pushing some putty into places on the inside of the shell?
Dale
Intellibox + own software, K-Track
My current layout: https://cabin-layout.mixmox.com
Arrival and Departure signs: https://remotesign.mixmox.com
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Offline JohnjeanB  
#5 Posted : 10 September 2020 20:57:11(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,056
Location: Paris, France
Thanks Dale
Have some specific putty in mind? What is it?

I believe I must be able to re-open the casing on occasions (lube the motor).
When I can go near my trains (my wife is very sick at the moment), I will otherwise try a thin layer of foam inserted around the casing guiding pins.
It probably will raise the casing by 0.5 to 1 mm just to try if it works (then I will lower the rest points.
May be your putty if it is special?
Cheers
Jean
My lay-out videos
latest vid
humping yard
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Offline DaleSchultz  
#6 Posted : 10 September 2020 21:04:25(UTC)
DaleSchultz

United States   
Joined: 10/02/2006(UTC)
Posts: 3,454
no specific putty in mind, but you could try plasticine, poster tack/presstick/blue tack and if that works, use an epoxy putty (Pratley's) . (Not sure what brands are available in France)

Hop your wife recovers soon.
Dale
Intellibox + own software, K-Track
My current layout: https://cabin-layout.mixmox.com
Arrival and Departure signs: https://remotesign.mixmox.com
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Offline JohnjeanB  
#7 Posted : 10 September 2020 21:28:24(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,056
Location: Paris, France
Thanks Dale. I hope dearly too. She is my "preferred wife for more than 48 years.
When that happens I will do some tests and report
Cheers
Jean
My lay-out videos
latest vid
humping yard
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Offline Br502362  
#8 Posted : 11 September 2020 08:49:44(UTC)
Br502362


Joined: 05/03/2014(UTC)
Posts: 616
Location: Finland
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Offline JohnjeanB  
#9 Posted : 11 September 2020 12:38:48(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,056
Location: Paris, France
Hi Åke

Sounds very encouraging. I will try it before installing an expensive sound decoder.
Thank you
Jean
My lay-out videos
latest vid
humping yard
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Offline ausland  
#10 Posted : 11 September 2020 15:24:24(UTC)
ausland

Russian Federation   
Joined: 26/10/2015(UTC)
Posts: 21
Location: Russia
Many years ago I made my living stopping odd noises in cars. What you might try, and what you have to do is change the 'frequency' of the vibrating part, is putting a piece of adhesive foam tape, if there's room, near where the vibration is most prominent. Tape does not have to be large, perhaps 8-10 mm roughly square or round, but should be 2-3 mm thick. If this does not work, remove the tape and put it in a slightly different position.

Ausland
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Offline JohnjeanB  
#11 Posted : 11 September 2020 15:57:01(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,056
Location: Paris, France
Hi Ausland
In this case the loco's metal body is shaped like a bell and is attached by one screw in the center with 2 resting surfaces:
- in front where the light conduit is
- at the rear (engineer's cabin) where the wires go to the tender
So I would try:
- to insert a dampening sheet on these resting places
- if this is not enough by inserting a plastic bar between the 2 sides of the body between 2 driving wheels (to stop the resonance)
Thanks to you all, you gave me great ideas
Cheers
Jean
My lay-out videos
latest vid
humping yard
thanks 1 user liked this useful post by JohnjeanB
Offline ausland  
#12 Posted : 11 September 2020 18:51:36(UTC)
ausland

Russian Federation   
Joined: 26/10/2015(UTC)
Posts: 21
Location: Russia
Originally Posted by: JohnjeanB Go to Quoted Post
Hi Ausland
In this case the loco's metal body is shaped like a bell and is attached by one screw in the center with 2 resting surfaces:
- in front where the light conduit is
- at the rear (engineer's cabin) where the wires go to the tender
So I would try:
- to insert a dampening sheet on these resting places
- if this is not enough by inserting a plastic bar between the 2 sides of the body between 2 driving wheels (to stop the resonance)
Thanks to you all, you gave me great ideas
Cheers
Jean


I don't have that particular loco either here or in US, but the principle is to change the shape, internally, of the boiler housing, hence the sticky foam tape. It's also mayhap possible to secure the boiler housing a little stronger to the frame, if that will not affect the running characteristics of the machine, by inserting a soft shim between the housing and the frame. Doing that stops the vibration which produces the sound. I'd go with the sticky tape inside the boiler and if needs be move it's position around a bit. Nothing ventured, nothing gained.

Ausland



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Offline DTaylor91  
#13 Posted : 14 September 2020 00:19:26(UTC)
DTaylor91


Joined: 31/08/2007(UTC)
Posts: 381
Location: Kennesaw, GA
I would like to add another material to play with: Thick, high density felt. I do a lot of work on high end audio equipment, and most good speakers are not hollow, but stuffed with poly fiber (as in pillow stuffing), or lined with foam, or high-density felt, or a combination of these materials. The idea is to break up the sound waves so that standing waves (resonance) cannot form inside the cabinet (Yes, this is simplified). High-density felt or foam is sometimes used around a speaker's tweeter to diffuse high frequency sound and keep odd high frequency reflections from bouncing off the baffle, or front surface. If you can find something similar to piano felt, that would do nicely. It comes in strips, and sometimes can be found with self-adhesive backing.

As an aside, when I got my 37082, a BR 10, I was not happy with the timbre of the sound, it was too hollow and "plastic-y", so I stuffed the top of the tender with some speaker stuffing from an old, sadly dead Bang & Olufsen speaker, and it made the sound much more tolerable.
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Offline kiwiAlan  
#14 Posted : 14 September 2020 13:16:31(UTC)
kiwiAlan

United Kingdom   
Joined: 23/07/2014(UTC)
Posts: 5,321
Location: ENGLAND, Didcot
Originally Posted by: DTaylor91 Go to Quoted Post

As an aside, when I got my 37082, a BR 10, I was not happy with the timbre of the sound, it was too hollow and "plastic-y", so I stuffed the top of the tender with some speaker stuffing from an old, sadly dead Bang & Olufsen speaker, and it made the sound much more tolerable.


Thats a thought, I was most disappointed with the sound on my Insider Br95 from a few years back. it sounds like the microphone was at the other end of a tube. Maybe I should raid my wifes batting that she uses for quilting and put some of that in the loco.
Offline wally45  
#15 Posted : 20 September 2020 21:13:23(UTC)
wally45

United Kingdom   
Joined: 24/08/2017(UTC)
Posts: 4
Location: MIDDLESEX
Many thanks to everyone for your help regarding noisy Streamline 01 PhilBigGrin
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