Grovenor

Thank you Mike, exactly what I said several posts back. Its the only reasonably simple solution that avoids any restrictions on the operation.

See my post above. When you put connections across the middle of a dogbone then both ends become return loops not just one of them. With the double track it is difficult to have just one by the junction except by using the original short version which limits your train options.

Sorry but the red sections on this drawing are not going to do the job on their own, they would work if you add two more, on the right hand side of the orange section where the up and down arrows are. The section of dogbone between the two pairs of reversing sections and the station would all be wired to the same polarity as the bottom side of the dogbone.

While you may be correct pedantically my experience of decoder sales literature is that functions in that context is used to mean outputs and I would expect a decoder sold as 6 pin 4 function to have a couple of spare wires or at the very least solder pads. Usually this info is available before purchase, if not don't buy as it implies the seller doesn't know what they are selling.

They are the same architecture at a fundamental level although may well differ in detail. But these issues are basic to DCC and affect pretty much all decoders trying to run on DC to some extent. The so-called analogue mode has always been rather problematic and has been gradually downplayed since the early days when DC compatibility was important for marketing. But it is a known issue that any decoder manufacturer has to take into account. There is no excuse for providing a decoder with the feature and having it cause damage. The worst that should happen is that running on DC may be erratic.

Well, as a modeller you can make your own ramp and raise and lower it by wire in tube or by a servo motor. One of those simple satisfying tasks.

Paul, It doesn't help when you post 3 new topics with the same title even though that title is only relevant to one of them. I would suggest you repost this in the 7mm modelling section with a new, relevant title.

This one, http://bluerailtrains.com/, Cooperated with Bachmann for their Ezy App and recently with Soundtraxx for Blunami.

Even if they didn't like it they usually put up with it and manage to work out the direction so they can run. A lot depends on the size of smoothing capacitor on the decoder and if it can get the input to the voltage regulator smooth enough.

The whole point of setting CV12 to DC mode (CV12 or CV29?) is to use it on a DC controller. And how would the decoder distinguish beween running in and normal operation? Actually when running is is recommended at something like half an hour each way its probably the more onerous use. If the decoder can't handle running on DC then the CV setting should be disabled. Its pretty normal with lots of decoders that running on DC controllers can be poor to impossible depending on the controller but they at least should survive if the feature can be enabled.

Are you able to try your simulation with a full wave rectfied supply rather than a smooth supply? Few traditional resistance mat controllers had smooth supplies.

RAF96, Surely if you are authorised to speak for Hornby then you can just as well do it here.

Go back to when it was Manchester London Rd. Then the platforms serving the ex LNW lines were not electrified but those few on the East side serving the ex GC were electrified at 1500V DC and the lines serving the Althincham lines on the West side were also 1500V Dc but there was no provision for through running between the two 1500V Dc lines. I would say the general principle was to wire up what was needed. Surely the London Rd example was very much the end of an overhead electrified railway (well two of them) joining a more important non-electrified line, ie the West Coast Main line.

Its sure going to build your muscles, heaving those from bookshelf to couch. I find 12 in a binder more than enough. 🙂

You need a reasonably smooth DC to drive a microprocessor, modern switch mode DC power supplies will provide this, no need to pay double the going rate for the Hornby product. To run on DCC the decoders have a rectifier and a small capacitor in the supply, the capacitot keeps the v oltage steady while the DCC square wave is switching polarity. To work on a 50Hz sine wave or a full wave rectified version of that, or even worse a half wave rectified supply a much bigger capacitor would be needed to smooth out the supply hence making the decoder bigger. Which is why decoders are not happy on those types of supply. A PWM supply turned up to full speed, in theory, should be a smooth supply but now you are depending on the detail of the design as to whether it actually stops pulsing at full speed or not, and the suppliers rarely supply that sort of detail. An oscilloscope would tell you but most of us don't have one, a multimeter won't help. So if I had spent £70 on a HM7000 I would stick to powering it with DCC or a smooth DC PSU.

To be fair, the posts are timestamped. The link was an hour before yours. 🙂

The CPC PSU linked to also has guaranteed OLP, OVP, SCP etc. and the output voltage is specified as 15V +/- 5%. It will do the job just fine. The data sheet does NOT show variable outpu based on variable input. These PSUs can take input from 90 - 240 so they can be used on different countries power systems. The data sheet is generic and the output voltage depends on the specific model you buy, the one linked being the required 15V. The Jack plug commonly used over many voltages including 19V for laptops. You can either buy a matching socket or just cut it off and connect the wires some other way.

See http://www.norgrove.me.uk/signalling/plans/Euston-a.gif

Yes, very much so, common in Germany Austria and Switzerland in a variety of detail variants. http://www.norgrove.me.uk/images/66162-WiesbadenDS.jpg

Plastic gears don't cause shorts. If these are old triang units then the wheels on one side are connected to the axles, the wheels on the other side are insulated from the axle and have wiper pick ups connecting them to the motor brush. Fitting one or both the axles with the insulated wheel on the wrong side will cause a short.

Agreed, as decoder manuals go its one of the best I've seen. And when you get to page 127 it does tell you that speakers should be 8 Ohm.🙂

See, https://www.moveelectric.com/e-cars/new-volkswagen-id-2all Seems its under £22,000 for the ID2, those wanting cheaper will have to wait for the ID1.

Thankyou.

But speakers come in different impedance values and the wrong one can cause damage or just not work. The technical data on the website is laughable, does the decoder come with an adequate data sheet?

Yes, if you are using for accessories with the 0V (-ve) of each power supply commoned together. NOT for powering DC train controllers where the 12V (+ve) may get joined to the 0V (-ve) of the other via the reversing switches and the track. Switch mode power supplies with an earth connection will have the DC output 0V or -ve connected to the earth.