Yeoman Posted October 9, 2018 Share Posted October 9, 2018 I have a 'Lamp Signalling Daylight Short Range Projector MK11 L.A.M.' - It is a morse key signalling lamp. The instruction plate states that the batteries are 8 'S' cells connected in series - presumeably to give 12 volts - I assume that there must be a single 12 volt battery that would do the job nowadays - could anyone kindly let me know what I should use? I was thinking that a small 12v motor bike battery might do? Can anyone let me know what L.A.M. means as shown on the lamp? Thanks. Any help or advice would be much appreciated. Kev. Quote Link to comment Share on other sites More sharing options...
Yeoman Posted October 10, 2018 Author Share Posted October 10, 2018 Just another thought, what is considered to be 'Short Range' in this context? Half mile?Mile? Any ideas? Thank you. Kev. Quote Link to comment Share on other sites More sharing options...
MatchFuzee Posted October 10, 2018 Share Posted October 10, 2018 A method to replace the S batteries:- http://www.museumoftechnology.org.uk/objects/_expand.php?key=519 If you are really keen you could make up 8 reproduction S battery cases each with a rechargeable battery inside. Quote Link to comment Share on other sites More sharing options...
fv1609 Posted October 10, 2018 Share Posted October 10, 2018 I think you will find it is Mk II rather than Mk 11. L.A.M. is the manufacturer, other companies made them including C.A.V. Quote Link to comment Share on other sites More sharing options...
Yeoman Posted October 13, 2018 Author Share Posted October 13, 2018 Hi Guys, Thanks for your informative replies - appreciated. The method of replaceing 'S' batteries is certainly worth considering - although I dont think that I will try to make up repro ones! Yes the lamp is a mkII (2) - should have used the right keys on the keyboard! I can see that L.A.M is the manufacturer, but who are they? Lucas? I would still like to know what exactly is meant by 'short range' - anyone know please? All the best, Kev Quote Link to comment Share on other sites More sharing options...
fv1609 Posted October 13, 2018 Share Posted October 13, 2018 Don't know about L.A.M. but C.A.V. were part of Lucas Quote Link to comment Share on other sites More sharing options...
fv1609 Posted October 13, 2018 Share Posted October 13, 2018 As for range: 2 miles Naked eye (Daylight) 3-4 miles Telescope (Daylight) 6 miles Naked eye (Night) 12 miles Telescope (Night) Not so good as a Heliograph that under ideal conditions could be up to 70 miles. Quote Link to comment Share on other sites More sharing options...
Yeoman Posted October 15, 2018 Author Share Posted October 15, 2018 Hi Clive, Thanks for the information about the ranges, very useful indeed and just what I was looking for. All the best, Kev. Quote Link to comment Share on other sites More sharing options...
fv1609 Posted October 15, 2018 Share Posted October 15, 2018 Kev there is a little bit of coverage on pages 1 & 2 in Tabby 03: I extracted the info for that & the Heliograph from the user handbooks. Quote Link to comment Share on other sites More sharing options...
Yeoman Posted October 18, 2018 Author Share Posted October 18, 2018 Hi Clive, Thank you very much for your reply and the link to 'Tabby Tales' - they certainly make interesting and informative reading. All the best, Kev. Quote Link to comment Share on other sites More sharing options...
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