Chrissaf Posted December 2, 2020 Share Posted December 2, 2020 HiYes, if they are filament lamps. Spares are readily available. This is the green filament lamp spare example http://www.petersspares.com/hornby-s8718gn-colour-light-signal-bulb-green.irIf LED lit then not quite so easy, but is possible with the correct LED items and care. Link to comment Share on other sites More sharing options...
96RAF Posted December 2, 2020 Share Posted December 2, 2020 Margate-Richmond has developed a retro kit that replaces the filament bulbs with leds. The kit includes the pcb that forms the back of the R406 signal. The kits cover a variety of colour combinations, not just red and green, but also yellow. Link to comment Share on other sites More sharing options...
Chrissaf Posted December 2, 2020 Share Posted December 2, 2020 Evening is it possible to change the red/green light bulbs on Hornby signal?regards jsionyRN Link to comment Share on other sites More sharing options...
Going Spare Posted December 2, 2020 Share Posted December 2, 2020 I note Peters Spares description of the bulb includes "(MES)". If this is shorthand for metric screw (?), these bulbs will not fit R406 colour light signals made in the UK as these have an imperial thread. If this is not the correct interpretation of MES, you will need to contact Peters Spares to determine whether they are suitable for your signal. Link to comment Share on other sites More sharing options...
Chrissaf Posted December 2, 2020 Share Posted December 2, 2020 But the description does go on to state "Fits the R406 Colour Light Signal". /media/tinymce_upload/b1acbc7032412f542b4c8c3a8f2f4ac4.jpg PS - Here is the matching Red onehttps://www.petersspares.com/hornby-s8718r-colour-light-signal-bulb-red.ir Just for information. At some point in chronological time [date unknown by me] Hornby updated the R406 signal from incandescent bulbs to 3mm Round LEDs. In their wisdom [i wish they wouldn't do this] they kept the exact same R406 stock code number. So buying these second-hand is a bit of a lottery as to whether you get the bulb or LED version. The LED version also includes internal reverse bias protection diodes to make the new LED signal version compatible with both DC (common positive) and 16 volt AC supply voltages. Link to comment Share on other sites More sharing options...
Rog RJ Posted December 2, 2020 Share Posted December 2, 2020 MES means Miniature Edison Screw. Link to comment Share on other sites More sharing options...
96RAF Posted December 2, 2020 Share Posted December 2, 2020 MES is miniature edison screw. .. there are many other sizes from Lilliput to Goliath.Read about them here.https://en.m.wikipedia.org/wiki/Edison_screw Link to comment Share on other sites More sharing options...
Going Spare Posted December 2, 2020 Share Posted December 2, 2020 Thank you both! I had come across ES but not MES and Google was no help. Wiki variously attributes the M to both Medium and Miniature! The pitch of the screw on Peters Spares bulbs still needs to be established, though. Probably metric.In view of Chrissaf's post, there are therefore at least 3 versions of R406: UK imperial thread bulb, China metric thread bulb, China led. Link to comment Share on other sites More sharing options...
Chrissaf Posted December 2, 2020 Share Posted December 2, 2020 The WiKi [granted can't always be relied upon] states that the Edison Screw 'Patent' originates from 1881 and being American who are not renowned for adopting European metric standards probably means that the actual thread is historic and specific to the whole ES range. Link to comment Share on other sites More sharing options...
The son of Triangman Posted December 2, 2020 Share Posted December 2, 2020 The bulbs are LES, Lilliput Edison Screw bulbs. They can be extracted using a straw if you don't have the special tool for the job. Link to comment Share on other sites More sharing options...
96RAF Posted December 2, 2020 Share Posted December 2, 2020 The thread-form patent will specify the curve or waveform of the thread and its pitch or lead ratio which can obviously be scaled to suit the bulb size be it xmas tree lights, bike lamp or torch, household or commercial lights. Link to comment Share on other sites More sharing options...
Flashbang Posted December 2, 2020 Share Posted December 2, 2020 The bulbs are LES, Lilliput Edison Screw bulbs. They can be extracted using a straw if you don't have the special tool for the job. So are you suggesting the filament lamps sold by Peters Spares for use in the older filament lit versions of the Hornby colour light signal are not correct? Or that simply they have used the wrong terminolgy? There is a vast difference! Link to comment Share on other sites More sharing options...
Going Spare Posted December 2, 2020 Share Posted December 2, 2020 We have been assuming it is the R406 signal - there was an earlier version (R405?) using a totally different bulb. Link to comment Share on other sites More sharing options...
The son of Triangman Posted December 2, 2020 Share Posted December 2, 2020 Think they might have the wrong terminology Flashbang. Pretty sure they are LES fitting, E5 5.5mm diameter, MES is E10 type 10.2mm Diameter. Could be wrong of course as getting old. lol Removal of the bulbs or tightening up is simple, insert the end of a paper straw over the glass end of the bulb and you can turn them. Link to comment Share on other sites More sharing options...
96RAF Posted December 2, 2020 Share Posted December 2, 2020 MES is described in the Wiki as used in torches which are considerably bigger than the signal lamp bulbs.LES is typically xmas tree lights which is much more like the signal lamp size. I reckon PS just got their terminology wrong. Link to comment Share on other sites More sharing options...
Ruffnut Thorston Posted December 2, 2020 Share Posted December 2, 2020 I seem to recall that there are indeed two types of bulb fitting for the Hornby big metal colour light signals? Not including LEDs... Not to be confused with the smaller Tri-ang Hornby signals, or the earlier Hornby Dublo signals... Link to comment Share on other sites More sharing options...
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