Hello Anyone would be familiar with this type of locomotive / board? It's a vintage Arnold #2482 It works well with a 9V battery forward and reverse But when I try to see where pickups are, and how the motor is powered....it seems weird With the locomotive on the rails, it seems both rails make contact with the chassis, as well as with the contact inside both large holes Could it be because of the green coils?
This link should help. https://www.arnold-ersatzteile.de/mediapool/60/605716/data/Eigene_Dateien_3/2482_E_BB_9291_SNCF.pdf
I think that is some kind choke?that European model makers put in locomotives to keep the motors from interfearing with radio/TV signals . You should be able to safely remove it if you need room for a Decoder . Mike
That's what I was thinking too Mike, either a choke or capacitor. No. 8 on this Arnold illustration is a Kondensator (Capacitor) for TV and they're in the same place as the green wire coils (chokes?) on @french_guy's model.
Yes, those green coils are part of the TV interference suppressor circuit once required in Europe (I don't know if it still is). The current is transferred from the trucks to plates on the bottom of the chassis and then through stiff wires which contact the circuit board when it is screwed down and then through those silver contacts in front of the green coils to the motor brush holders. I have't worked on this particular loco but have on similarly constructed Arnold ones. Doug
It looks like a decoder install will be pretty easy (assuming it fits between top of board and shell But for the electrical part, it seems simple....
As confirmed by some of the components identified by others to address TV interference this looks like another RCA-Victor. Real Curious Assembly, Victor was the one that did the final assembly.
Are you planning on lighting the locomotive as well? If so you should know there are 2 selenium diodes on that board which would need to be removed first. Under each of those rings is a reddish fiber board with a round piece of metal. That’s the diode. You will most likely have to remove the board, bend the tabs from the rings out of the way and then you should be able to see how the diodes are fastened in. Could be a rivet or just pressure from the rings. Once the diodes are removed, isolate the contact that is under the diode from the ring and the ring becomes one of the light polarity leads. The other lead would go to the bottom of the bulb, but then there is the matter of the truck pickup for the bulb, which would also have to be modified. It’s doable to put DCC in this, it’s just a bit of work.
I was planning to replace the 2 bulbs by LED's instead..... Are you saying I NEED to remove those selenium diodes (red disks)? If I'm using LED with resistor, can I just "ignore" these selenium diodes? Can they also affect the decoder and the motor function?
Yes, you will need to remove the diodes, if you are going to use those pockets for the bulbs. While the bulbs or LEDs are in the pockets and the locomotive is on DCC rails the lights will both be on and they will constantly flicker. If those contacts are not going to be used and the bulbs will remain isolated from that area then you can leave them in place.
No, I won't use the pockets for the bulbs nor LEDs I will install wired LEDs directly connected to the decoder.....
