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Signal lamp batteries

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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.

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Just another thought, what is considered to be 'Short Range' in this context? Half mile?Mile?

Any ideas?

Thank you.

Kev.

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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.

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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

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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.

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Hi Clive,

Thanks for the information about the ranges, very useful indeed and just what I was looking for.

All the best,

Kev.

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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.

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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.

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