I guess MRC never Email you back.
I just sent MRC an inquiry. Hopefully I can report back after work on Monday what the response is.
A good sign for the hobby is MRC is develping new DC packs. to them.
Jim
Jim,
I understand what you are saying. Maybe that one is the most compatible for running G-scale, your guess is as good as mine. I noticed it is sold out. My three MRC CM 20's have a mode switch, mode 1 for G-scale is 0-20vdc TOtal out 100va and mode 2 is 0-14vdc for HO,N and other DC operated trains at total 100va. So I don't know why the 23v.
Cheers,
Frank
The motor sounds fine no buzzing but after abut 20 laps it gets a tiny bit warm about 78 to 80 but I think that's normal.
Well, the other 2 packs in the Tech 7 series, the 700 and the 780 both have the same accutech verbiage and they are listed at 13.5v and 14.5v respectively.
http://www.modelrectifier.com/resources/dc-ac/TECH7_Manual.pdf
But the other pack is rated at 23 volts?
Per the accutech statement, this claim dates back at least to the tech 4 series.
OP, how does the motor sound when using this pack. Does it buzz or is it very silent.
Randy,
That's about what MRC did, In the link I posted above,they explain basically what you said. They call it Accutec Technology, Trade Marked.
Likely the loco motor never sees 23 volts - I think what they did with this pack is use pulse-width modulation like the output of a DCC decoder. Definitely gives a smoother control. The pulses may be 23V peak but the motor doesn't see that, it sees the average voltage which as slow speeds, with just a narrow pulse, is not much.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
I'm a little curious about the 23 volt output. I run DC and usually build my own power supplies and they rate at substatially more power output than any MRC power pack. Most of what I've built began as a Lionel transformer and worked as large as a 275W ZW. 20 VA is not that much output overall, but I suspect that the 23 volts is to help overcome voltage drop throughout the power range.
I would try it out with multiple locomotives and see how well it will take them.
Mark H
Modeling in HO...Reading and Conrail together in an alternate history.
I bought the mrc tech 7 because I was sick of the Athearn power pack that only has 7va output to the track and I would half to trun it up to 70 or 80 to make my train run at a nice speed witch is a safe slow speed to run.I am running HO train the union pacific sd40-2 pulling 9 cars some times more, the mrc can be used for HO and it has 20va output to the track now I only half to turn it up to 55 and it runs great and the slow speed cral is great also.Oh and my layout 9x4 EZ-Track and I plan on going bigger.
richhotrain zstripe If he wants to do that, they will have to give him a lot of money back, considering,what the, tech 7,760,costs. Cheers, Frank 30 bucks, tops. Rich
zstripe If he wants to do that, they will have to give him a lot of money back, considering,what the, tech 7,760,costs. Cheers, Frank
If he wants to do that, they will have to give him a lot of money back, considering,what the, tech 7,760,costs.
30 bucks, tops.
Rich
Rich,
Amazon, states that they have,18 in stock, at 49.45 per. You better stock up, you never,know.
Alton Junction
Swap it for an MRC Railpower 1370, my all time fav.
It appears, it can be used, with HO,N, O and all others, that use DC.:
http://www.modelrectifier.com/train-controls/dc-power-tech4.asp
Are you running G-scale trains? 23 Volt output is for G-scale.
If you ran an HO or N scale loco at that voltage it would be going 200 or so scale miles per hour and you would burn up the motor and lights.
I would like to know why the output is 23 volts.
I just bought the MRC Tech 7 ampac 760 I would like to know what all of you think of it.