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Post by dieselfan1 on Jul 26, 2024 15:51:51 GMT -5
How many engines will one of these run at one time?
I'm hoping to run some trains with 5 or more locos.
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Post by rvn2001 on Jul 26, 2024 16:39:21 GMT -5
I have run 6 locos, including several MTL F7s, without any problems. They were pulling a 100-car train at the time.
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Post by ednadolski on Jul 26, 2024 21:13:11 GMT -5
How has this been modified? I thought that the (normal) output voltage was too high for Z. Can they be adjusted?
Ed
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Post by zscalehobo on Jul 26, 2024 22:29:10 GMT -5
MTL adds a couple of screws to stop at 10v Then they have a sticker to indicate 8v setting for Marklin locomotives.  |
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Post by ednadolski on Jul 26, 2024 23:52:13 GMT -5
Thanks, Frank, that is interesting, I did not know that such a version existed.
When they talk about 10v or 8v, I wonder what they actually mean -- it sounds like DC volts, but the 1300 that I have does not put out DC -- putting it on a scope shows a modified, periodic waveform that looks like a sine wave with some added harmonics. So I guess it cannot mean RMS either. Perhaps they are just limiting the amplitude, but that would not equate to DC volts either.
I can use mine with Z scale but never turn it up above about 1/3 of the dial, which is about 50%-60% on that yellow sticker.
Has anyone ever tried using one of those $10 PWM motor controllers from Amazon with a 9v battery?
Ed
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Post by rgs455 on Jul 27, 2024 2:44:41 GMT -5
Thanks, Frank, that is interesting, I did not know that such a version existed. When they talk about 10v or 8v, I wonder what they actually mean -- it sounds like DC volts, but the 1300 that I have does not put out DC -- putting it on a scope shows a modified, periodic waveform that looks like a sine wave with some added harmonics. So I guess it cannot mean RMS either. Perhaps they are just limiting the amplitude, but that would not equate to DC volts either. I can use mine with Z scale but never turn it up above about 1/3 of the dial, which is about 50%-60% on that yellow sticker. Has anyone ever tried using one of those $10 PWM motor controllers from Amazon with a 9v battery? Ed I have used one of the " 10$" Amazon PWM Controllers Worked ok with AZL and MTL lokies.. as with my H0e Minitrains stuff. The old 3 Pole Maerklin lokies didn't perform well because the PWM Frequency was to high to smootly overcome the inertia of the motor. BR Boris |
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Post by BAZman on Jul 29, 2024 14:42:17 GMT -5
Most ALL power-packs (pic a name) do not pure DC. They learned about Pulse mixed with DC makes locomotives start better, with the 'pure' capacitor (condenser) to eventually fill in the pulses. The should be the same as this MRC. Waveform need to observed under load. The PWM LED Dimmers are 50-200Hz, most are the ~200 Hz to get out of 'buzz. These use the same Pulse Period (a.k.a. Duty-Cycle) principle that DCC decoders do. Every pulse is the same as 'track' voltage. At 'Off' there is no pulses so theoretically no track power pulses. As you turn up the Dimmer, these same track voltages stay on longer, and longer. At 'half-way), the pulses are On 50% and Off 50%. Because the motor gets enough of these On pulses (remember, 100's per second) the loco runs '1/2 of full speed. Turning towards Full, the pulse are 'On' longer and lessor Off, so the loco's motor can be kept running faster. A lot of the dimmers and Voltage reducers do NOT fully turn off (an LED should to remind you) but generally do not have Power (Current dominant but effective near 0) Attachments:
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Post by domi on Aug 1, 2024 11:26:09 GMT -5
BTW, is the MRC1300 a PWM power pack ? In other words, what kind of (very) low speed characteristics can it allow ? Is it possible to run any loco at the pace of a scale walking man ?
Dom
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