There was some debate among us as to whether we should or not, but we realised that just as the late 1970s CLSs we have were superseded by LED signals, the development of 'in-cab' signalling will in turn displace the LEDs.Mike Hodgson wrote:Good to see some more modern signals being preserved.
No, they will not be wired up to the frame - as with the existing CLS demo, they will be connected to some form of sequencer. 'Flashing yellows' have already been mentioned! We expect they will be parallel to the present 4-aspect heads, so the difference should be easy to show.Mike Hodgson wrote:A couple of suggestions for your consideration ... are you going to wire them to the lever frame?
Or perhaps connect to some sort of automatic simulator cycling through the aspects (the model railway market has some cheap devices which could be used to control this).
You could consider wiring that 4-aspect head in parallel with and adjacent to a conventional head with 4 separate lamps so as to illustrate to the layman the similarities and the difference between the two types.
With the several duplicate JIs, I had started thinking about using one to illuminate the stairs - certainly the bottom section. As you say, we will need to be careful, but if pointing away from the railway, there should be no problem. There is a spare 4-aspect head on which we could mount the JI at about the right height.Mike Hodgson wrote:Richard Pike's JI does such a good job of illuminating the garden and his kitchen I have heard it referred to as "Luton Airport Landing Lights" - and that one has bulbs rather than LEDs. I appreciate your constraints about not pointing these things at the Main Line and that you also have to avoid any possible nuisance to other neighbours, but if you are able to strategically site a JI which is lit continuously during your opening hours, it may be good enough to act as a street light for your visitors. If the height of a JI makes that unsuitable, a double white aspect on a GPL might serve the same purpose.
John Webb wrote:Mike - thanks for the info - I am aware of the use of earth-free 100V from my studies of signalling practice, although my experience is mainly with BS 7671 (The Wiring Regs). We are not under insurance compulsion to use ELV - it's a decision we took when we first started putting wires round the garden purely from a safety viewpoint for protection of our visitors, particularly the younger ones, and to a lesser extent ourselves. We already have a transformer with 100V output (floating) which we used for a short while on our first 4-aspect 1970s signal - but the 24V bulbs in that were too bright for close viewing; we suspect the same problem will arise with the new LED signals! But we'll sort that problem when we get to it.
Bob Davies wrote:Surely, a '1970's' signal would have used 12v 24w double-filament 3-pin bulbs (SL35) so I am not sure where 24v comes in, or did you remove the 110/12v transformers from the signal head? A high-intensity PLJI from the same era would also have used SL35 bulbs although there were still plenty of older PLJI's around using SL33 110V 16w bulbs.
Users browsing this forum: No registered users and 1 guest