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Converting DC locos to DCC?

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Posted by SeeYou190 on Sunday, January 31, 2021 10:50 AM

The Milwaukee Road Warrior
Anyway, is it possible to just buy a DC loco and then buy a decoder for it and (after some work) voila: a new DCC loco for less than it would have cost me to buy the DCC version in the first place?

Yes, it is completely possible.

Some of the people I know who use DCC always try to buy a model without a DCC decoder and install one themselves.

This is not a cost-saving venture for them. Instead, they prefer certain decoders over others, and would rather install the decoder they want.

Lastspikemike
You cannot acquire too many tools.

Oh yes I can.

I have supplied complete tool kits to two son-in-laws and a nephew, and not even put a dent into my tools collection.

This is just the automotive tools.

This does not even include any of the hobby tools, woodworking tools, or all the house improvement tools I have bought in the past three years. I have more (and better) tools than any of the workmen that show up from contractors I have hired.

-Kevin

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Posted by mbinsewi on Saturday, January 30, 2021 1:34 PM

jjdamnit
An inexpensive heat gun (embossing tool) can be found at many craft stores for about $20.00.

I use the soldering iron.

For stripping 30 ga. wire, once again, I use the soldering iron, no ripped or boken wires.

Just sayin..

Mike.

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Posted by woodone on Saturday, January 30, 2021 1:34 PM

If you only have two or three to do, I would farm them out to a good DCC installer. By the time you gather up the proper tools and equipment (if you don't have already) maybe smoke a decoder or two, you would be ahead of the game- You have thirty or mores , you better learn how to do this and get the tools and equipment to do the work yourself.  

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Posted by jjdamnit on Friday, January 29, 2021 4:33 PM

Hello All,

The Milwaukee Road Warrior
This really cuts to the chase here. This (along with JJ's reply) make(s) (SIC) the point that after all is said and done I may not be saving much - if any - money. Some of the tools would be a one(-)time (SIC) investment...

Unfortunately, this is the conundrum of all DIY projects.

"She who must be obeyed" doesn't understand why I have nine "tool storage units" (toolboxes) for the various tools I have amassed over the years.

However, she does appreciate not having to hire a handy-man for the routine jobs that come with homeownership along with bicycle maintenance and ski tuning.

A few years back our sewer line froze in January and I didn't happen to have a ground heater and a backhoe in my arsenal of solutions. We hired a plumbing contractor because the time, effort, and knowledge necessary for this job was beyond my scope.

When I was an apprentice electrician if I needed to "borrow" a tool more than three times I invested in that tool, knowing that it was essential to my being able to complete my work without having to rely on others. 

When I got back into model railroading many of my previous investments in tools were resurrected.

It's definitely a balancing act of what you will use frequently, what you need to complete the task at hand, and outsourcing the job to those- -not necessarily more qualified- -but have invested in the specialized equipment necessary.

You are the only one that can determine the balance between cost and value.

You may find that these initial projects are not feasible now but in the future, after amassing the tools and knowledge, they will become an attainable goal.

Hope this helps.

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Posted by CGW103 on Thursday, January 28, 2021 8:44 PM

I am very hard of hearing so sound is meaningless for me.

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Posted by mbinsewi on Thursday, January 28, 2021 8:29 PM

tstage
Okay, Andy, that's helpful to know.  While I get where you are coming from, I would disagree with you that non-sound is somehow a "half-measure".  I

Yes

Mike.

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Posted by tstage on Thursday, January 28, 2021 8:19 PM

The Milwaukee Road Warrior
tstage
Are you only interested in installing motor-only (non-sound) decoders in your locomotives?  Or, are you thinking about sound, too?

IF I ever did the conversions I would do the full functionality with sound.  I tend not to do things in half-measures.

Okay, Andy, that's helpful to know.  While I get where you are coming from, I would disagree with you that non-sound is somehow a "half-measure".  I love DCC and enjoy sound but "in measures".  So, I don't need sound to enjoy DCC and like F8 for muting as much as enabling sound.  It's the excellent motor & independent control that turns my crank.  However, I understand that others come to this hobby for different reasons; hence why I asked you the question that I did.  Thanks for replying.

Tom

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Posted by The Milwaukee Road Warrior on Thursday, January 28, 2021 7:23 PM

rrinker
With more modern releases, where the loco is offered as DC, or as a DCC with sound version, it typically costs the smae or slightly more to fit the same quality decoder and speaker to the DC version as the price difference. There's typically no economy there, unless you are willing to use a lesser quality decoder.

This really cuts to the chase here.  This (along with JJ's reply) make the point that after all is said and done I may not be saving much - if any - money.  Some of the tools would be a one time investment, but looking over my stock of old DC locos now I realize that ALL of them are outside of my modeled era: early 50s.  They are all later designs except for an Amtrak F7 I have in the Amtrak paint scheme: so even there I would have to repaint it if nothing else.

Looks like I will need to start from scratch building a roster of motive power.  

EDIT: it would be one thing if the locos I owned matched those running in that era; then I can see looking more into the conversions.  But mine are all GP units from the late 60s/70s so I can't use them on a layout based in 1950 to 1954-ish.

Grrrrrr.

Anyway, thanks for the input.  

Andy

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Posted by The Milwaukee Road Warrior on Thursday, January 28, 2021 7:19 PM

tstage
Are you only interested in installing motor-only (non-sound) decoders in your locomotives?  Or, are you thinking about sound, too?

IF I ever did the conversions I would do the full functionality with sound.  I tend not to do things in half-measures.

Andy

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Posted by BigDaddy on Thursday, January 28, 2021 5:30 PM

The Milwaukee Road Warrior
But mostly because the timing of Walthers new Milwaukee Road Hiawatha F units last year was just a bit early for me and now all the DCC versions are sold out, leaving only DC units available. Would I consider trying to convert cheaper DC units?

That adds an element of specificity that hasn't been addressed.  There are cheaper sources for Walthers locos, than Walthers, but if they are gone they are gone.  We have discussed the modern business strategy of "pre-orders" many times. 

If you want/need the Walthers F, and you don't want to wait until on appears on Ebay (and at who knows what price?) installation makes complete sense.  If you have a time machine handy, you would be better off going back in time and buying the DCC version, but I assume that is not an option.

Stewart F units and Life Like Geeps are popular DCC conversions.

Henry

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Posted by doctorwayne on Thursday, January 28, 2021 4:21 PM

While I'm a lifetime DC operator and have no interest at all in changing to DCC, I have done a couple of DCC conversions for friends.

The first one was fairly easy, which included building the locomotive and modifiying the tender to accommodate the decoder (non-sound), but because the owner was not nearby, I had no means of programming the decoder.  He took care of that when I delivered the otherwise ready-to-run loco...

The cast metal tender had no floor, only two projections cast as part of the tender's body for truck-mounting.  I removed those, and constructed a simple floor/underframe, and lined the all-metal tender with styrene to eliminate any chance of an accidental short between the electrical stuff and the tender...

The instructions which came with the decoder were easy to follow, so there was no real difficulty in making the proper connections.

Here's the loco ready for delivery to the owner...

The second one, mostly completed last night, was, for me, a lot more difficult. 

The installation, again non-sound, was for AirWire...basically converting an old Mantua Pacific into a Hudson, then changing it into a battery-powered locomotive - also known as "dead-rail".
The loco was pretty-well ready to use, and, with its open-frame motor removed, rolled almost as well as a freight car when given a decent shove.

Here's the loco and tender...



The conversion package included the decoder, a wireless hand-held throttle, and a three-cell lithium-ion battery, along with a battery charger.

Getting the components into the tender (a Bachmann "long" USRA coal tender) was quite a squeeze, partially due to the tender being fitted with a fully-modelled coal bunker (a feature I usually have to fabricate for my own locomotive tenders).  I removed most of the coal bunker and, with the easy-to-follow instructions for the decoder, was able to make all the necessary soldered connections, including those for a headlight and back-up light, using small LEDs.

I also was able to isolate the motor (yes, the open frame motor, still fitted with its original magnets - I offered to replace them with rare earth magnets which is a good way to get better perfomance from these older motors, but the owner insisted that the loco would run well even with very low power input, and it did, indeed, take little power to get it moving smoothly, at least on track power.

I decided that there should be an easier method for charging the battery, rather than having to disassemble the tender just to make the connections, so I installed a colour-coded plug-in in the new bottom of the former coal bunker (which was now so shallow that there was little room left for the cast-in-plastic coal pile).  I also added a small double-pole/double-throw/centre-off slide switch to access the "RUN", "CHARGE", and "OFF" options (the double poles weren't necessary as such, but I soldered the wires to both, mainly due to the small size of the switch, figuring that it might limit flexing of the solder joints if the tender body was repeatedly removed from the frame.

Here's a "wand", made from a slit plastic tube of unknown source, fitted with a small rare earth magnet, and then wrapped in aluminum tape...

Affixed to the underside of the "coal" load is a small steel nut - the loco's owner has an occasional issue with hand tremors, so I thought that this would be a simpler solution for accessing the features hidden under the coal...

...and here's the switch which will allow the loco to run or to allow charging of the battery, plus the labelled port for connecting the charger to the battery...

Here's the stuff which connects the tender's equipment to the loco...

The photo below shows the underbody of the modified tender, with the empty hole where the screw which originally held the tender's body to the underframe, partially hidden by the truck's rear axle.  Modifying the area near the front of the tender to accept screws, as shown, allowed the post inside the tender's shell, into which the now-missing screw had been attached, to be removed, freeing-up much needed space inside the tender...

...and a view of the tender's innards...

When I began to try getting the loco running, the tender body was on and off multiple times as I struggled to figure out what I was doing wrong. 
According to the instruction booklet, completing the first phase of the wiring could be checked by activating the battery (the "RUN" position on the slide switch), which would light a small green LED on the decoder if the connections were correct.  When it glowed green was the first time in a couple of weeks that I managed a smile. I also installed the wiring for the connections to the motor and headlight, but that was about the end of my progess.

Further wiring was then completed, again following instructions, and I managed a second smile when a red LED on the decoder appeared, another sign of success.
I still couldn't get the loco to move, although when I flipped the switch to "RUN", both the headlight and back-up light would flash on for a micro-second...I thought that I'd fried them both, but was able to repeat the process multiple times.

I managed to partially install the address for the decoder, but due to somewhat ambiguous instructions and my limited knowledge of the process, changed it several times, none of which would allow me to make the loco move.  It also took me a while to discover how to remove those incorrect inputs.
 
After about two weeks of no progress, and increasing frustration with my obviously limited knowledge of this subject, I 'phoned the loco's owner to make him aware of my difficulties.  He didn't seem too worried about it, though, and called me back the next day, with a 'phone number for the person through which he had acquired the components for this installation.

Yesterday evening, I called and had a very congenial and enlightening conversation which, when the call ended, allowed me to actually "run" the locomotive...first on the test track in my workshop, then on my layout.  I also accidentally learned how to activate the lights, too.

There is still some fine tuning needed before I can paint the loco and tender, but I'm at least in a better frame of mind than I have been for a while. 

This whole experience, though, has reinforced my choice of keeping my layout strictly DC.

Wayne

 

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Posted by snjroy on Thursday, January 28, 2021 1:27 PM

Heat shrink tubing is extremely useful for all sorts of electrical applications. I use all of the sizes... Even if DCC installs does not turn out to be your thing, you will probably use them for other electrical applications. As for wiring, I bought a package from ESU, gauge 36 I believe. The price is OK. 

Simon

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Posted by rrinker on Thursday, January 28, 2021 1:17 PM

 $50-$100 buys you a good quality controlled soldering station - which will come in handy for a lot more model railroad things than installing decoders.

$10 of heat shrink is probably a long time supply, if you buy the right sizes and not an assorment that contains 8 sizes you will never use and 2 that you do.

No need for a heat gun, not with a soldering station. Turn it to the lowest setting, it will shrink but not melt the heat shrink, especially if you get the good heat shrink. (not the cheap vinyl) In fact, the good stuff doesn't melt all over even a regular always-on soldering iron - watch the DCC Guy (Larry Puckett), he's always shrinkign heat shrink with the tip of his iron. I still use the side, after turning my station down to the lowest setting.

 Some other tools, you probably should have anyway if you are in model railroading, even if you don't install decoders, like a set of small screwdrivers. Honestly, kapton tape, heat shrink, and spare decoder wire are probably the only things you shouldn't have if you've been in the hobby any length of time and simply haven't worked with DCC. What I really need is a roll of JUST blue decoder wire - Saving the excess cut off from other installations generally gets me plenty of all the other colors, but since blue is the function common and ends up running front to back on most diesels, it's the one color I always need more of. I've barely touched any of the others in the multicolor pack I have.

                                       --Randy

 


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Posted by jjdamnit on Thursday, January 28, 2021 12:36 PM

Hello All,

One thing that has not been talked about is the cost factor of specialty tools that will make decoder installation easier.

Unless you are dealing with locos that are "DCC Ready" with an 8-pin NMRA compliant socket you will need more than just a set of jewelers screwdrivers, about $5.00-$15.00.

Installing a decoder in a loco without this socket will require you to solder or "hardwire" the decoder, light(s), and speakers if installing sound.

A quality soldering iron will run you between $50.00-$100.00.

Good quality solder about $30.00 for a 1 lb. roll. This will last a lifetime.

You will also need heat shrink tubing to insulate the solder joints. You can find "multi-useless" packs with sizes you will never need or you can buy only the diameters you will use most often. A ballpark guestimate would be $10.00-$20.00.

An inexpensive heat gun (embossing tool) can be found at many craft stores for about $20.00.

You might also need small gauge wire (30 AWG) for things like headlights (white, yellow & blue), motor leads (orange & gray), pickups from the trucks to the decoder once the motor has been isolated (red & black), speakers (purple), etc.

Digitrax sells an assortment of nine (9) colors for about $10.00.

When isolating the motors of older Athearn B.B. locos I like to paint the cavity where the motor contacts were with liquid electrical tape- -less than $10.00.

Kapton tape (electrically isolating tape) and double-sided foam tape are also handy for decoder installations. Add another $10.00-$15.00.

For small wire gages a wire stripper is a nice "luxury" to have, about $30.00.

This comes to between $175.00-$250.00 for a one-time investment of tools and supplies.

If you are converting only one or two locomotives this hidden cost might not be practical.

However, if you are converting a fleet then the cost of DIY supplies along with the cost of the decoders and speakers might be worth it in the long run.

Hope this helps.

 

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Posted by snjroy on Thursday, January 28, 2021 10:24 AM

So the answer to OP's question is yes and maybe. All points made so far are valid. A few things I would add:

1) For newer locos, check your math. It is sometimes cheaper - or more expensive to add the decoder yourself. DCC locos on sale are worth looking into!

2) BB locos - they are relatively easy to convert if you are comfortable with the idea of opening a loco and removing drive train components. But I would say do this for sentimental reasons: the math is not in your favor if you want a smooth running loco. DCC is more sensitive to things like power hiccups, which means that you might have to change wheelsets if you still have the original wheels on them. The original wheels pick up a lot of dirt... The "gold" motors are fine, but the older motors might need to be changed. Try it on one and see what you think (don't go out and buy a bunch of supplies...). Modern locos from the major manufacturers are very impressive... 

3) I find that sound is overrated for diesel engines, but that's just me! 

Simon

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Posted by RR_Mel on Thursday, January 28, 2021 10:22 AM

After you’ve done one they’re a piece of cake.  I only have a dozen decoders or so but I have over 70 locomotives.  I rewired all of my locomotives for DCC operation so that I can swap around my decoders if I decide I want to run one on DCC.

I have done the DCC conversion to over 30 Athearn BB diesels, Proto/Life Like and Model Power.  I also have well over 30 steam locomotives that I converted.

All work fantastic on either DC or DCC.

I would also check the current draw by the motors on older locomotives and make sure you go with a decoder that can handle higher current motors if needed.

 

Mel



 
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Posted by mbinsewi on Thursday, January 28, 2021 9:52 AM

I like that TCS site, and go to it frequently for info on installs.

I've done many Athearn BB's, as that's all I had when I moved to DCC.

As others have mentioned, with old DC locos, check the stall current first to make sure the motor is suitable for conversion.

Mike.

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Posted by DanRaitz on Thursday, January 28, 2021 9:18 AM

Larry Puckett has a nice video that shows how to this install.

 

88. DCC for a Blue Box Athearn Loco - YouTube

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Posted by rrinker on Thursday, January 28, 2021 8:06 AM

 With more modern releases, where the loco is offered as DC, or as a DCC with sound version, it typically costs the smae or slightly more to fit the same quality decoder and speaker to the DC version as the price difference. There's typically no economy there, unless you are willing to use a lesser quality decoder.

 It pays to keep looking though - so many of these get bought out by collectors who put them on a shelf and never run them, then end up sellign them off. I've gotten factory sound locos on eBay and elsewhere for less than the MSRP of the DC only version.

 That said, any newer loco that is offered as a factory DCC version is easy to convert. The decoder generally just plugs in, and unless they really went to the expense of designing and manufacturing two different chassis, there's a space for the speaker without resorting to milling the frame. 

 Athearn BB locos are not difficult to convert to DCC> The key is isolating the bottom of the motor from the frame, there are metal tabs on the bottom motor clip that run in the space under the motor. Cut off the tabs, or swap the top and bottom clip (but be careful, those clips also hold the motor together, with both removed, the motoi will fall apart unless you hold it together. And put a layer of thin tough tape (Kapton is the recommended type - electrical tape is too gooey and messy) over the space in the bottom of the motor, solder a wire to the bottom clip, and you are all set. There is soldering involved, and also the best way to get a power pickup is to drill a hole in the frame and tap for a brass screw which you can then solder the decoder input wire to. The bracket in front for the headlight works as an attachment point, but that rivet is often loose and makes poor contact.  Solder a wire between the two truck tabs that stick up, that's the other rail input to the decoder. Not a tough job but you do have to solder. 

                                             --Randy

 


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Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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Posted by tstage on Wednesday, January 27, 2021 10:44 PM

Andy,

Are you only interested in installing motor-only (non-sound) decoders in your locomotives?  Or, are you thinking about sound, too?

Your older BB locomotives may need to have the motor brushes isolated from the chassis before converting to DCC.  (Otherwise, an inadvertent short could fry the decoder.)  Depending on the locomotive, this can be eithe fairly straightforward or involved.  Newer locomotives, OTOH, generally come "DCC-ready" and will be outfitted with a 8-pin socket to plug an aftermarket decoder into.  However, the term "DCC-ready" means different things to different manufacturers.

So, bottom line: Your decoder installations will have to be taken on a locomotive-by-locomotive basis.

Tom

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Posted by hon30critter on Wednesday, January 27, 2021 10:40 PM

Hi Andy,

As is usually the case, there isn't one simple answer to your question. I will try to break things down a bit for you:

Regarding recent locomotives that were offered in both DC and DCC, the DC units should be easy to convert, that is if they are available! You won't likely be saving any money but you should be able to get decoders that are pretty much 'drop ins'. There might be some soldering involved for things like the speaker connections and maybe some accessory lighting.

Your older locomotives like the Athearns might require a bit more work. Depending on the age you might have to isolate the motor feeds and everything will have to be soldered. Don't be put off by that. There are tons of tutorials, many on specific locomotive models, that will make the conversions easy. Once you have done a couple the rest will be a piece of cake!

If I can, I will offer just one piece of advice: If the locomotive doesn't run smoothly on DC then adding a decoder will not cure the problem. Learn how to clean and lubricate your DC locomotives before spending any money on decoders.

Cheers!!

Dave

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Converting DC locos to DCC?
Posted by The Milwaukee Road Warrior on Wednesday, January 27, 2021 9:58 PM

As I look at the price difference between DC and DCC locomotives the DC locos are cheaper by a good amount, and I've read about others who have converted DC locos to DCC by installing decoders ...I think.  (Or maybe I was reading about DCC-ready locos).

Anyway, is it possible to just buy a DC loco and then buy a decoder for it and (after some work) voila: a new DCC loco for less than it would have cost me to buy the DCC version in the first place?

Why do this? you ask.  Well, I don't know that I would, because the work involved would be painful for me since I've never done anything with decoders before.

But...

All of my old locos from the 1980s are Athearn blue box models, and I might consider retrofitting them if it isn't a complete PITA.

But mostly because the timing of Walthers new Milwaukee Road Hiawatha F units last year was just a bit early for me and now all the DCC versions are sold out, leaving only DC units available.  Would I consider trying to convert cheaper DC units?  Maybe.  But I'm asking for opinions on this as I am clueless.

Thanks. 

https://www.walthers.com/search/sort-by/sku/sort-direction/asc/show/120?q=920-+FP7

 

Andy

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https://www.flickr.com/photos/196857529@N03/

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