DC Controllers

I did a search on the subject and was buried under DCC articles, so I’ll just ask outright. I am due for some power pack upgrades, what I have isn’t cutting it. A small toylike thing with a poor quality throttle control came with my son’s trainset, and I have an old TYCO dual cab unit with one cab still functional, and currently, the DC and AC terminal’s status unknown.

The control panel for the layout is designed with two wings, each of which can fit a single or dual cab controller up to 6 inches wide. I’m using a mix of diesels and steam, recent and up to 35 year old locomotives, and the layout includes a steep grade of 4.3 percent.

The toy transformer that came with the train set has power to spare for all the locos to pull the grade, but the electronics are so poor that it only has two effective speeds, too slow and too fast. The Tyco has less total power, won’t run the locos as fast, but the control is delicate and I like the power curve, it’s easy to do realistic starts and stops.

The layout is a folded dogbone with a dual mainline connecting the two loops, with two multi-track spurs inside the upper loop and near the U turn dual line curve. It is wired into six control blocks, one for each turn around loop, one for the inner and outer hillclimb U curve, and one block for each spur area.

I can see up to three separate operations going on at once, mainline runs, switching at the upper mining spurs, and switching and train make-up on the lower set of spurs in town, which is also an interchange with another railroad depicted by the lower turn-around loop. The lower loop also has two spurs for staging, but those will be controlled with DPDT switches and the cab for the loop itself. The plan is to haul loads of ore out of twon, park them on the loop under the mountain for a while in “Durango”, while staged freights and passengers bring up coal, freight, and passengers to town. These are then broken down and the necessary cars sent on up to the mines.

When it comes to DC there is Model Rectifier Corporation (MRC), and anything else. Go to their site and pick what you want and then shop for the best price. I think they are up to Tech IVs now. I have 3 Tech IIs that are at least 20 years old and love them.

Dual throtle controls can be limiting, particularly for more then one operator. For straight, DC throttles, nothing beats MRC.

Nick

Make this a third vote for MRC. For DC controllers you can’t beat them.

Yup!!! All mine are mrc. I have 4 of them and all are great performers at all speeds.

Good deal. I didn’t want to skew the poll by mentioning this earlier, but the only hobby shop in range only carries one brand of DC controller. Fortunately that brand is MDC. In fact, I designed the control panel around an eyeball estimate of size from the ones at the hobby shop, so it looks like I’m all set.

Nbrodar, If I go with the 3 or 4 throttle option, my son would be running one unit, and my daughter and I would share the dual, or something similar. In that case close quarters wouldn’t be a problem. If any other railfans show up, they’ll just have to take turns, because they do NOT get to brush hands with me unless they look like Jennifer Anniston.

Is that the limitation you were referring to or are there electrical considerations as well? Are the dual throttle models electrically isolated from each other, or will a heavy drain on one throttle drag down the other’s output as well?

MRC tech series

Yes

Most are isolated, but a heavy load on one side will drag down the other side.

If you want to stay with DC; I would suggest used MRC Tech II 2500 power packs as your best bet, functionally and dollar wise. You can get them on ebay for $20 or less, search MRC 2500.

The standard MRC DC throttles are what you are looking for. Do not waste your time/money on the ‘dual’ throttles. Buy two seperate thottles - not much more money and you will be happier!

Jim Bernier

Single MRC. Anything else is a waste of money. I have one dual throttle, but use it as single, wasting a reostat. I hooked one up one single with a small handheld in line with a long cord that can be carried around. This runs the logging spurs which are hidden by mountains no matter where you stand. The grandchildren like this. They can walk with the engines.

I have a pair of MRC Tech ii’s that I’ve been using forever and wouldn’t change a thing, except maybe upgrading to DCC which won’t happen any time soon. I have an MRC Tech ii 2400 on cab A and a 20 yr old Tech ii 1400 on cab B.

The only upgrade I’d like is a walk around throttle. My turnouts are all manual at the moment and I have a bit of walking to do to get to some of them. Any thoughts? I was looking at the MRC Control Master 20 but it’s not in the Tech series and may be overkill.

Most dual control throttle use a common transformer. The common connection to ground, means you can’t use them for Common Rail wiring. Althought the newer, MRC dual controls are suppose to be wired so you can use them with common rail.

There is also the closeness factor for more then one operator.

Nick

As said, nothing beats MRC. Their Tech 4 Power packs are fantastic, but still a bit pricey.
Their older packs are great too.

Sorry I am not experienced enough to answer your other quetions

Best of Luck

I have the MRC 2500 and 9500 - I love them both. Have had them for years without a problem. I bought both at a good discount at train shows.
Enjoy
Paul

Thanks again to all for your information. Everything I used to know about model railroading is now decades old and making decisions based on it would guarantee mistakes.

Nfmisso, that’s what I was looking for regarding dual throttle cabs. The mainline cab will definitely be a single, and I’m considering the same for the two spur areas. The uoper level spurs are only two tracks, not much operating going on there, other than pick-ups and deliveries. Still, a single covering bothareas would shut down operations at the lower yard during that time, and that’s a busy interchange with another and larger city (staging area).

Since no more than one loco can operate in either spur area, I’m not expecting huge power consumption, but at crawl speeds in the yards, any fluctuations will cause noticible problems. I currently leaning towards the solution of runing the mainline and upper spur area from a single throttle controller, and dedicating the lower yard area to another single throttle unit. That would ease the block transition problem discussed earlier, at least at the upper spur area which is more of a problem because the block transition occurs in a tunnel, allow simultaneaus operations in both spur areas, and avoid a dual throttle cab.

ARTHILL, which MRC units allow the use of remote cab controls? The area I’m modelling is pretty vertical, I’ve gotten into time trouble there before just trying to find a spot flat enough to pitch a tent. Fortunately, I’ll have clear sightlines into all the critical drainages from the master control panel. Still, I like the idea of being able to move around while operating. I took a good look at the MRC website today, and didn’t notice any of the Tech 4 models mentioning remote cab ports. I like the idea of momentum effects, and so far, either the 220 or 260 will do the job. I also didn’t see any remote handheld units either, either wireless or on a cord. Is that something offered by another brand , only for DCC, or only available on older MRC po

FYI: MRC’s Tech series power packs do not use Rheostats. They are transistorized and use potentiometers (pots). Pots have wafers to adjust a small regulated voltage that is amplified by the transistors instead of the wire-wound rheostats that adjust the voltage directly and are prone to wearing out.

I have using GML walk around throttles/controller for years without problems. It has the usual brakes and adjustable momentum and provides power for 3-4 engine lashups. Thought you take a look at their site:http: //www.thegmlenterprises.com/
Cheers,
Cliff

http://cliffordconceicao3310.fotopic.net/c328807.html