Author Topic: Adding power pickups to passenger cars, cabose, or freight cars  (Read 2744 times)

Offline renegade

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Adding power pickups to passenger cars, cabose, or freight cars
« on: February 03, 2015, 08:23:41 AM »
Ok, I did the write-up of WHY in an different thread, but in short, lets say you want to ad light to a passenger car or caboose, or want to install a decoder to control light, or add sound to a freight car or caboose, using the new Soundtraxx SoundCar decoders, or a function only decoder.  You will need to get DCC signals (or just power for non-DCC applications) into the car...

Yes, there are commercial options, guys that sell a bogie that has metal pickups already installed.  you can also salvage some from an old coal tender, or other disused model that might have had it factory installed for whatever reason (usually to add interior or directional lighting)  this is all good and feel free to do so.   the commercial bogies will have to be ordered from the USA or Europe, since I have never seen any local shop stock these.... having said that, our local hobby shops are Box Movers.  they tend to be very badly stocked on loose parts or kit bashing consumables.  yes, we get paint and loose wheels or couplers, but few other items are typically available...

I have to say also, that the original idea to do this conversion is not my own.  This is a slightly refined way of achieving what others have done for quite some time already.  I have simply added my own little bits here and there.

But, lets get back to converting standard PLASTIC bogies into power pick-up bogies...  metal bogies CAN be used, but there are some considerations.  firstly, you MUST have wheel sets with plastic axles, and secondly, you need to use one bogie to pick up LEFT rail, and one bogie to pick up RIGHT rail power, otherwise, the method I am describing will create a short!  Thus, bogies with plastic frames work better, since you can then effectively have 8 wheel pickup on a standard car with 2 bogies and 2 axles per bogie...

1) Parts needed:
your model might already have some of these items, others you will need to source.  I have not added cost, since prices will vary, and in a couple years' time will be 100% incorrect...   but still, this conversion will cost you very little... look at the parts list...  this is for EACH BOGIE, ie, you need to double this up if you want to convert both bogies on a car...



~2x short pieces of thin, flexible wire (color is irrelevant, but red and black is the standard for DC and DCC)
~2x small self tapping screws (1mm x 3mm is ideal)
~2x Kadee coupler centring springs
~2x insulated axles with METAL wheels (plastic wheels are not good conductors of electricity, so make for VERY BAD power pickup!!!!  :stir: )
~1x your model's old bogie frames

« Last Edit: February 03, 2015, 08:43:59 AM by renegade »
Francois Kritzinger

Modeling HO American and S.A.R. And any high speed trains. And lego trains. And... Oh I just love trains!

Offline renegade

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #1 on: February 03, 2015, 08:27:26 AM »
2) Making the power collectors
The Kadee springs needs to have the 'fingers' bent open, and straightened out, and the end needs to be cut shorter.  the actual length depends on YOUR bogies. but in my case, I needed to cut them right next to the hole...

below is the springs, on the left, standard spring, and on the right the modified one...

Francois Kritzinger

Modeling HO American and S.A.R. And any high speed trains. And lego trains. And... Oh I just love trains!

Offline renegade

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #2 on: February 03, 2015, 08:31:01 AM »
3) Fitting it all together...
The next step for me is to put a small drop of flux on the top side of the spring, and solder the red wire to one, and the the black wire to the other...

Then, locate the springs on the bogie, and mark the centre of the hole, and drill a small hole (sufficient for the screws to work) on each end of the bolster.  Your bogie might have these 2 little details, as I circled in red below...  Remove them, along with any other details ON TOP of the bolster.  DO NOT REMOVE THE LITTLE LIP AROUND THE HOLE, as this will render the bogie useless!
 


I found it is easier to FIRST install the wheels, and then fix the springs in place using the 2 screws...

« Last Edit: February 03, 2015, 08:41:55 AM by renegade »
Francois Kritzinger

Modeling HO American and S.A.R. And any high speed trains. And lego trains. And... Oh I just love trains!

Offline renegade

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #3 on: February 03, 2015, 08:38:11 AM »
4) Final Assembly
Lastly, drill 2 small holes (bigger than the diameter of your wires) through the floor of the car.  feed the 2 wires through, and fix the bogie using the original screw.  It is important to remember that the bogie must be able to turn unobstructed, so leave a little bit of wire on the OUTSIDE of the car to cater for this!  I usually just leave 2 small loops that I try to get reasonably flat against the floor.



Once done, you will have 2 wires that are on the inside of the car. this can be used to connect to a DCC decoder, or other electronics you might need to have installed.

In order to improve connectivity, and the running of the car, you might need to add some weight to the inside.  They are simply super glued into position.  more weight will ensure all the wheels make better contact, but too much weight will not be good either, so I just stick to NMRA recommended practice. It has served me well up till now...  In the picture above I added 2 large 65mm clout nails to get the total car weight to just over NMRA recommended weight.
Francois Kritzinger

Modeling HO American and S.A.R. And any high speed trains. And lego trains. And... Oh I just love trains!

Offline BigEd

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #4 on: February 03, 2015, 09:30:38 AM »
Very nice.  :thumb:

Now do one for N scale...
For long you live and high you fly
And smiles you'll give and tears you'll cry
And all you touch and all you see
Is all your life will ever be

BREATHE
Dark side of the moon
Pink Floyd 1973

Offline renegade

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #5 on: February 03, 2015, 02:01:32 PM »
Thanx Ed...

Now do one for N scale...

and you just HAD to get this one in...   I will have to figure out how to get the centering spring fastened to the bogie... but I think the basic concept will still work... I just don't know if too many n scale locos will be powerful enough to pull a car equipped with this though...
Francois Kritzinger

Modeling HO American and S.A.R. And any high speed trains. And lego trains. And... Oh I just love trains!

Offline Freightcars

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #6 on: February 03, 2015, 05:38:16 PM »
Hi Francois,

Thanks for the writeup.  I have a similar project that I need to do sometime soon so this is helpful.

 :thumb:

Cheers,

Niel

Offline capeklr

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #7 on: February 03, 2015, 06:36:51 PM »
Excellent idea, I like it very much.  :thumb:

Offline BigEd

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Re: Adding power pickups to passenger cars, cabose, or freight cars
« Reply #8 on: February 03, 2015, 11:03:15 PM »
and you just HAD to get this one in...   I will have to figure out how to get the centering spring fastened to the bogie... but I think the basic concept will still work... I just don't know if too many n scale locos will be powerful enough to pull a car equipped with this though...

There are other options. This guy makes stuff for N scale... http://www.richmondcontrols.com
For long you live and high you fly
And smiles you'll give and tears you'll cry
And all you touch and all you see
Is all your life will ever be

BREATHE
Dark side of the moon
Pink Floyd 1973