Search found 907 matches

by Brian
Sat Jul 11, 2020 10:19 am
Forum: DCC (Digital)
Topic: Decoder to provide DC track
Replies: 3
Views: 131

Re: Decoder to provide DC track

Hi Decoders use PWM at 20KHz and often higher. They also use Bemf to 'read' what the motor is doing and try to maintain the motors speed to whatever is set on the console (to within limits of course!) Much like Cruise Control does on a car. PWM is probably better in some ways for fine motor control,...
by Brian
Fri Jul 10, 2020 8:23 am
Forum: Wiring and Electrics
Topic: Oh dear ..... an electrofrog conundrum
Replies: 22
Views: 329

Re: Oh dear ..... an electrofrog conundrum

If possible, take a good close up photo of the points frog area on their undersides and post the image here (From vee end of point to roughly the middle) I would be interested to see what they are like underneath. :D
by Brian
Thu Jul 09, 2020 5:33 pm
Forum: Wiring and Electrics
Topic: 12v transformers
Replies: 2
Views: 83

Re: 12v transformers

Hi These are very high current output and way above the normal requirements for a model railway lighting plus they are AC outputs. Whatever you do remember the current from these is far higher than normally used. Therefore it should be split and each protected accordingly. So here's my take.. Use a ...
by Brian
Tue Jul 07, 2020 9:56 pm
Forum: Wiring and Electrics
Topic: 12V grain of wheat lights set up?
Replies: 4
Views: 74

Re: 12V grain of wheat lights set up?

In addition to the advice above, LEDs will only consume around a 1/10 of the power filament lamps will do.. Your 10 x 0.08ma lamps will draw 800 milliamps (just over 3/4 Amp) where as 10 LEDs will draw around 50 to 100 ma depending on their series resistor Ohm value. Plus they run virtually cold. Ne...
by Brian
Mon Jul 06, 2020 10:08 pm
Forum: Wiring and Electrics
Topic: Oh dear ..... an electrofrog conundrum
Replies: 22
Views: 329

Re: Oh dear ..... an electrofrog conundrum

See post #6 No switching just switch rail making contact onto stock rail. Assuming there is no short circuit occurring and IRJs are fitted to the points Vee rail ends, then the problem can only really be one of two things IMO...Both of which I've already covered! A) The switch rail is not making goo...
by Brian
Sun Jul 05, 2020 6:21 pm
Forum: Wiring and Electrics
Topic: Oh dear ..... an electrofrog conundrum
Replies: 22
Views: 329

Re: Oh dear ..... an electrofrog conundrum

If you're relying on just moving switch blade to fixed stock rail connection for power transfer through and out of the point you MUST ensure the inside face of the switch rail and fixed stock rail are spotlessly clean and a tight fit when closed together. To prove,,,, wait until the loco stops on th...
by Brian
Sun Jul 05, 2020 3:55 pm
Forum: Wiring and Electrics
Topic: Oh dear ..... an electrofrog conundrum
Replies: 22
Views: 329

Re: Oh dear ..... an electrofrog conundrum

Hi Ensure the factory fitted links are in place under the factory cut slots in the two closure rails approaching the frog. If they have been removed then the rails beyond the gaps out via the frog and to the the IRJs on the ends of the Vee rails will be dead, unless some form of frog polarity switch...
by Brian
Sun Jul 05, 2020 2:15 pm
Forum: Modelling Techniques - Show & Tell
Topic: Hornby original HAA wheels replacement?
Replies: 4
Views: 82

Re: Hornby original HAA wheels replacement?

Hi

You really need to line up the left hand side of the wheel tread with the 10mm/1Cm mark then measure from that mark towards the right. :D
I doubt if the rules left hand edge is zero mm? :o
by Brian
Sun Jul 05, 2020 1:11 pm
Forum: Wiring and Electrics
Topic: Help - my soldering iron tips are black!
Replies: 20
Views: 151

Re: Help - my soldering iron tips are black!

I have an Antex ST4 stand and never had an issue?? Are you pushing the iron on to far?
Antex replacement tips shouldnt cost more than around £5 each! Example... Antex 2.3mm tip example