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Just another modeller
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*** Hello Bob

I'd just noticed Martins Post - I remember him buying them but wasn't aware he was playing around with N scale at the moment! Very surprised to see the post as I'd just finished doing some custom programming of sound for his Bachmann OO scale 9F!

No, the axle diameter is different - the N scale pickups are designed for N only - the standard N axle is 1.5mm diameter, the spring, which is 0.1mm Phosphor bronze, has a 1.8mm ID so its an easy sliding fit that never loses contact but adds absolutley no friction either.

A dead easy install as you can see, and also OK for added loco pickups on tender or any undriven axles - far better than any form of wiper!

The 4mm/OO/HO scale ones will be of a larger internal diameter to match the 2mm diameter axles, but the same length - longer is not needed, (and for some N, very slightly shorter may be better but its not critical at all)

I'm pleased he posted it as I have been so distracted with other things that I forgot to announce they had arrived some time ago!

The Larger ones for OO/HO will be about 3~4 weeks. Price may vary for the OO ones as the N springs were bought at the very start of the exchange rate collapse...

Richard
 

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Just another modeller
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9,967 Posts
*** The spring contacts only the axle. To get it to work you need to have one wheel live to axle, one insulated. This is very common in wheels in all scales, especially on coaches.

If the wheels are both insulated, then you need to either replace the wheelsets or make one wheel live to the axle - this can be via small etched discs available from someone like Bill bedford, or conductive silver paint or conductive epoxy from us and other suppliers.

db ice 3 - It will work only with metal axles. As above it needs one wheel live to that axle. To add it, you remove one wheel, slip it on and replace the wheel. There is a tail on each spring to make adding the wire easy.

In his images I think Martin actually cut the tails too short, as they should be of such a length that the wire can be out of sight totally - however his red wire at least makes it clear :).

Richard
 

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Just another modeller
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9,967 Posts
*** Minitrix usually do have them this way from memory. Wheels usually pop out easily by flexing the frame a little - thats how theyare put there in the first place :)

You can easily check by using a meter - switch it to ohms or if it has one to the setting for continuity test. Place one probe on the wheel and one on the axle. If it reads zero or close to it that wheel is live.

If you are not in a mad hurry I will be supplying these to a couple of UK stores as soon as orders are confirmed.... if you want now can also supply direct if U email me at the email address in my signature at the bottom of this reply to confirm details.

Richard
 
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