marklin-users.net community | Forum

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

Notification

Icon
Error
497/3 P vs. 497/3 LP motor brushes
Share
Options
View
Go to last post in this topic Go to first unread post in this topic
Previous Topic Next Topic
Offline Marty  
#1 Posted : 14 July 2008 02:19:35(UTC)
Retweet
Marty

United States   
Joined: 29/05/2008(UTC)
Posts: 272
Location: USA
Maybe someone here can dig up some information on these motor brushes as listed in the 1954 Märklin catalog:

The 497/3 P motor brushes are described as brushes for almost all HO gauge locomotives. These brushes look like the usual cylindrical copper mesh and carbon brushes.

The 497/3 LP are described as "similar to 497/3 P for especially slow drive. To be used only in pairs".

What is the difference? And why would one type of brush be better for slow speed running?

Thanks,
Marty
Back to top

Wish to join the discussion?! Login to your marklin-users.net community | Forum accountor Register a new forum account. Or Connect via Facebook  
Back to top  
Offline spitzenklasse  
#2 Posted : 14 July 2008 04:09:58(UTC)
Retweet
spitzenklasse


Joined: 06/04/2008(UTC)
Posts: 1,573
Location: ,
Hi Marty, My best guess would be higher resitance to the commutator from the brushes for slower speed. They are talking back in 1954. That was the old flat style commutator. I'm not sure if even the base 3000 clas 89 Loc. still has it. Use only in pairs is specified because you replace both brushes, never just one. Old and new parts don't mix well. as in the brakes on a car, you want both sides of pads to wear equally the same.
Back to top
Offline Marty  
#3 Posted : 15 July 2008 04:15:45(UTC)
Retweet
Marty

United States   
Joined: 29/05/2008(UTC)
Posts: 272
Location: USA
That sounds about right; use higher resistance brushes to compensate for the transformer's voltage range. I'm sure those old transformers started at 4 or 5 volts, so for a lower voltage, Märklin just increased the resistance at the brushes...

Thanks for the response,
Marty
Back to top
Offline intruder  
#4 Posted : 15 July 2008 21:52:04(UTC)
Retweet
intruder

Norway   
Joined: 16/08/2006(UTC)
Posts: 5,382
Location: Akershus, Norway
Some of the old Märklin transformers even started at 7 volts, like the 6117 from 1962.

Best regards Svein, Norway
grumpy old sod
Back to top
WWW
Users browsing this topic
Guest
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 © 2003-2025, Yet Another Forum.NET
This page was generated in 0.323 seconds.