mikesndbs

Brilliant info as always! Note the info plate says 21VB, assuming VB is fully fitted or is this one of the 100 that were blow through?

Thanks I found the details now it was part of diagram one/149 lot 3120 a thousand off bill at Sheldon in 1958 so it's odd that it should have the k prefix as you observe

Hi there I have one of these wagons by mainline I think it is brown it's number is B 4 2 9 8 1 6K however looking through my book it would appear these numbers never went higher than 429799 can anyone help

Hi Nik, no, once I saw double the safe value I intervened.

Less so apparently but I guess that's because of the longer gaps between pulses. Not good for these modern motors however

That's perfect thanks

Here is a video of them running

Brilliant info guys thanks. These are being run under DC, but I guess bemf can still be a thing. Is there any cure for it, can't use flyback diodes due to needing to go in both directions

Hi guys. Yes confirmed DC and not my layout it's a freinds with straight track.

Has anyone yet identified the difference between the Vector and Crawler by Morley? They are the same price now but still say there are additional components. I wonder if they just reduced the smoothing capacitors as per my findings? Love to know?

Livery and wagon, thanks

Hi guys, what was the latest these would be seen about the network

Guys I've got an odd issue with my 45. When I run it from PWM controller (any type) all the lights come on together, red/white and cab lights. Loco runs lovely but all the lights come on. On normal DC normal function is restored. Is this flyback from the motor? if so it must be very efficient, is it coreless? Thanks

What you have done is very clever and I like how it looks, however the rear of the speaker should not be sealed. The sound from the rear of speakers is important. In hifi speakers it is both passed through baffles and ported to produce base. Constraining the cone also stops it moving properly. If you are happy with how it sounds that great but as an ex speaker producing company employee it's best to leave the back open.

Hi Got a CEP and BEP and even a pair of EPBs that run well on their own, they run at close to the same rate also. But when coupled together there is an odd surging effect when they slow down then speed up again. Not layout specific nor controller, anyone know what the issue is please?

Absolutely correct, why risk things when the suggestion answer is so simple and non invasive. I measured the pads as +3v that of course was without the head tail LEDs in circuit, so with the 200R feed resistance and the LEDs in circuit I think it is just about safe, but close lol

Hi, that would only fix one LED and the wires are very delicate. It would also be a material change to the model thus invalidating the warranty. My suggested approach is completely removable. and one resistor fixes both LEDs and coach lights. Hope this helps

Morning, I get that but due to the complexity and so the viewer can see what the modification looks like a video was really the only way. I know what you mean about box opening, I hope none of mine ever fall into that category 😉

Very interesting, looks like LED efficiency is massively improved from what it was, typical was 20mA lol now we are uA amazing. The one in this model in my humble opinion need 8k plus.

Hi, if you look the video you can see the original resistors and note they are marked 682. Now while 1k is only 14% increase LED brightness is not linear compared to series resistance. I'd liked to have added 2k but as explained this would have resulted in too much voltage available to the 2.7v capacitor and coach lighting. 1k a good compromise I feel

Hi, I'm sorry the video is not more clear, I do say I'm adding 1k in series with the existing resistors. Making 7k8 total, this dims the head and tail and leaves more current for the coach lighting. If you cut a track on the main PCB you would further dim the coach lighting. I explained I felt clearly what the copper strips do and how this is a minimum alteration that is easily reversible.

I posted a how to reduce the brightness and increase the coach lights about four posts back. Chech out the video. If you need some tape and a resistor let me know now tell me about this feedback controller?

Here we see the Kernow GWR Steam Railmotor having it’s showcase run. This is my second model as the original had failed head/tail lamps. This new one looked like going the same way so I dimmed them down (video guide already up) Enjoy seeing this beautiful model running with real sound and music.

How I reduced the brightness of the head/tail LED on this remarkable model. This will be a technical discussion for those with some electronic knowledge and I am not recommending you undertake any of the actions I have done, however I have sought to minimise alteration to the original model design. I can’t say it’s my best ever work but you will understand the reasons why as the video progresses. I had to send back my original model seen in the video here due to failure of the LED head and tail lights, as you can see here the white light had already failed and the rear red was massively bright heading for oblivion. Be most interested in your thoughts?

I never even knew that was possible! thanks. Got one more simple fix to try