Search found 712 matches

by RAF96
Tue Feb 23, 2021 8:17 pm
Forum: DCC Forum
Topic: Triangular junction polarity
Replies: 6
Views: 132

Re: Triangular junction polarity

It is not exactly simple + and - polarity as DCC is a square wave bi-polar format hence we are talking matching phasing. I.e. getting the positive and negatives lumps to match as they wave. If they are contra then its the same effect as DC - a short as up meets down.
by RAF96
Sun Feb 14, 2021 11:22 am
Forum: DCC Forum
Topic: Do I really need twisted cable for DCC bus?
Replies: 10
Views: 295

Re: Do I really need twisted cable for DCC bus?

The problem of EMI (electromagnetic interference) was seen in fairly modern aircraft like the Canberra where many cables from different systems were bundled together in hefty looms. This created two main problems, cross talk from system to system and heat build up within the loom. After a few incide...
by RAF96
Sun Feb 14, 2021 11:15 am
Forum: Baseboard Design and Construction
Topic: [Hornby] How To Build A Baseboard
Replies: 20
Views: 487

Re: [Hornby] How To Build A Baseboard

Definitely a Warren Truss as opposed to a Warren Quadrangular as used on the Wellington bomber fuselage.
by RAF96
Fri Feb 12, 2021 1:08 pm
Forum: DCC Forum
Topic: Do I really need twisted cable for DCC bus?
Replies: 10
Views: 295

Re: Do I really need twisted cable for DCC bus?

The next question is bound to be about bus snubbers or terminators or whatever you want to call them. Here is the theory behind their use to damp spikes and ringing of a square wave signal such as DCC. https://electronics.stackexchange.com/questions/479565/how-do-reflections-of-a-square-wave-cause-r...
by RAF96
Fri Feb 12, 2021 12:52 pm
Forum: DCC Forum
Topic: HORNBY RAILMASTER WITH E-LINK
Replies: 7
Views: 165

Re: HORNBY RAILMASTER WITH E-LINK

Ironduke wrote:So the loco is moving when you read or write a CV?
It must be doing something.

Sounds like you need Hornby tech support.


The loco moving is just the decoder sending an acknowledgement back to RM that it has heard the instruction. Some locos jerk, some flash their lights, some beep as an ACK.
by RAF96
Fri Feb 12, 2021 12:45 pm
Forum: DCC Forum
Topic: HORNBY RAILMASTER WITH E-LINK
Replies: 7
Views: 165

Re: HORNBY RAILMASTER WITH E-LINK

Wow I must say the documentation is hard to find I think this is it http://www.rail-master.com/guide_en.pdf The guide downloads to your desktop every time you install an update. Get the latest version of RM and manual from here http://Www.rail-master.com/rm_setup.exe Edit: Before reading any CV, pl...
by RAF96
Fri Feb 12, 2021 12:40 pm
Forum: Electrical & Electronics
Topic: Power distribution, relays & things
Replies: 1
Views: 100

Re: Power distribution, relays & things

I have looked at these relay modules for use in creating a DCC and Manual Switch operated solenoid points system. I already have a huge relay panel using 12v car relays but wanted to downsize the thing using these relay modules. The problem is there are so many variants you can fall foul of. I have ...
by RAF96
Wed Feb 10, 2021 10:12 am
Forum: DCC Forum
Topic: DCC Fitting Hornby Class 47 (R2480) circa 2005 [fixed]
Replies: 3
Views: 99

Re: DCC Fitting Hornby Class 47 (R2480) circa 2005

I would check that the screw(s) holding the (tender?) collectors to the motor housing (items 14 on the service sheet) are not touching the wires or you will have made your chassis live by mistake. As usual once you have everything disconnected run a meter between the motor brush retainers and each w...
by RAF96
Wed Feb 10, 2021 10:02 am
Forum: Electrical & Electronics
Topic: piggy backing pl-13 switches on PL-10E
Replies: 5
Views: 166

Re: piggy backing pl-13 switches on PL-10E

I find one PL-13 can often be too much load for a standard solenoid motor, unless a CDU is being used to whack them over. My present layout has both regular and surface mounts types of solenoid some with PL-13s and some without operated by DCC accessory decoders. Reliability is reasonable for the no...
by RAF96
Wed Feb 10, 2021 9:49 am
Forum: Electrical & Electronics
Topic: Hornby curved points / eurostar woes..
Replies: 7
Views: 181

Re: Hornby curved points / eurostar woes..

You say if you change the wheels over it is better. That suggests to me the pickups are being disturbed or improved during the swap over. Check the pickups still make good contact when you press the wheels side to side. Also that the wheels and pickups are clean.
by RAF96
Thu Feb 04, 2021 12:11 pm
Forum: DCC Forum
Topic: Dc and dcc
Replies: 16
Views: 622

Re: Dc and dcc

You probably should have started a new topic for your question. I use Elite, Select (stand alone and walkabout) and eLink with Railmaster, all with their 4-amp power supply unit. I also have a HM2000 DC controller. All totally satisfactory. I also use their accessory decoders, reverse loop module, s...
by RAF96
Mon Feb 01, 2021 11:59 am
Forum: Electrical & Electronics
Topic: Arduino Bluetooth DC controller
Replies: 11
Views: 1237

Re: Arduino Bluetooth DC controller

Or you could wait for the tad more expensive Hornby HM 6000 BLE app based analogue control system to come out around Easter time.
by RAF96
Fri Jan 29, 2021 1:11 pm
Forum: Hornby - including Lima, Rivarossi, Jouef, Electrotren
Topic: New loco makes whirring noise
Replies: 3
Views: 172

Re: New loco makes whirring noise

The whirring is the motor running so it is likely to a gear train failure.
Warranty job.
by RAF96
Wed Jan 27, 2021 10:42 am
Forum: DCC Forum
Topic: Dc and dcc
Replies: 16
Views: 622

Re: Dc and dcc

Plenty of room in a 0-4-0 to fit a decoder and a socket.

7FB2EABA-CC8C-4800-BFE8-8719D2D158DC.jpeg
by RAF96
Mon Jan 25, 2021 8:15 pm
Forum: DCC Forum
Topic: Laisdcc & Hornby Select Controller.
Replies: 7
Views: 223

Re: Laisdcc & Hornby Select Controller.

I was about to buy a 'Laisdcc' decoder, but I noticed they state they won't work with the Hornby Select Controller. can you provide a link to where it says that? NOTE: This decoder does NOT work with the Hornby Select controller and other Basic, non-NMRA compliant controllers, such as Railmaster / ...

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