LGB Schoma Speaker?

AddictiveBiscuit

AddictiveBiscuit

Steam Locos, Armoured Vehicles and Aviation
So I recently bought a second hand LGB Schoma of ebay but I noticed that the windows had been sprayed black and being curious I wanted to know why.. This is the inside I haven't seen photos of Schoma's with this set up before its a speaker but one of the wires has came off somewhere, can anyone help me here?

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I thinking that this is probably one of the early Schoemas fitted with a sounding horn, which I assume was operated by a track magnet..... I'm guessing that the blacked-out windows are to hide the horn mechanism from view, as it is installed in the cab. Don't know where the loose wire goes, sorry - although somewhere there must be a reed switch or similar which is triggered by a magnet.

Jon.
 
I don't think that is OEM..
Judging by the 'bits of metal' on the floating pink wire, and red wire, I would say these were originally for batteries. - Especially looking at the plastic mouldings at that end of the box..
Looks more like a commercial 'bell box' of some description??

I would start with a single 'AA' battery, and connect it across the 'speaker' momentarily.. If there is a click, it *may* be a speaker, but it looks like either a telephone insert, or a 'sounder' (horn) of some sort..
If 1.5V is not enough, then try two 'AA' batteries.. Then three..
Oh, and try both polarities..
 
I tried a 9V battery after somebody pointed out that there is a space for a battery :D As soon as the loco got any power the battery got hot very quickly and I took it out straight away, so I'm not sure if it needs batteries? There isn't a anything on the other end for AA's. I took this plastic out and its defiantly not original just says Alarm on the back I've emailed the previous owner and they haven't a clue how it works so wonderful!
 
Not saying it needs batteries.. Just that the original unit did..

I would guess, if a 9V battery fits, then dob 9V across the 'loudspeaker'.. I think it will just make a noise!

A little difficult not knowing where the wires go, once they get into the loco.. I suspect the battery got hot because it had track power up it, or there was a short-circuit.
 
If you look at the picture carefully, you can see it has spaces for 2 AA batteries.

There is a clip at one end of the battery "space", that one has a red wire.

Notice the black wire that is loose has an IDENTICAL clip? Place it at the other end of that box, directly across from the clip with the red wire.

Now, I would make a guess, the positive end of the battery goes towards the red wire and the negative end to the black wire.

It seems that since there is an enclosure that already fits an AA battery, and the contacts for the battery is there, that it ran off a single AA battery. Try this first.

Also, I do not think that is a speaker, but a horn, with an internal vibrator, further reinforced by the adjustment screw with the locking nut on it.

These are basically buzzers with a diaphragm that makes sound by the vibration. The adjustment is setting the gap of the "points" inside, which is a make and break vibrator.

Greg
 
Took it all apart! Must work on batteries and I found a part which dropped out so AA's could work.
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Its just a horn.. Made me jump, to trigger it you just press the button on the bottom of the loco, might improve it as the AA's struggle to fit, I'd like to move it to be fair so I can have the cab space back.
 
Yes there is bits that fit in the track that push the button in. Got to figure out how to get this dam magnet off.
 
It doesn't look like original equipment from LGB. I don't know much about the very early LGB locos, but I can't picture LGB doing something like what you have pictured. To me it looks like some previous owner fitted the speaker into the cab. That and the plastic box most certainly appears to have been a battery box, re-purposed.
 
So, a cheap battery buzzer, with a little ingenuity to make it fire as the lok traverses the track..
Rule 8 for sound!
 
All original LGB its catologued in the roth and doggett 1996 world of LGB book. works on a trigger ramp which is put on the positive side of the track on an analoge railway. The cab windows are blackened to hide mechanism. the electonic sound effects on the NWE and DR 262 use the same system and trigger a bell in reverse and a chime in the forward there is a 9v battery in the water tank.
 
"All original LGB"

I'm shocked.
 
Heheh! Called it, even though it looks so rudimentary.... never seen one of those opened up before, although I knew that there was a very early Harz 2-6-2 that had a "mechanical" bell.
Jon.
 
Nothing to be exited about.. Just sounds like some cheapo buzzer so I'll probably never use it, taken it out and put it in the front of the loco so I can have the cab back as I want to detail the inside, A preservation group I'm part of owns two Schoma CHL-60G's so I have perfect reference material for making the cab ;) Be nice to known what the LGB model is based on.
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I have a (yellow) Schoma diesel that I am have converted and am slowly and getting back it back into decent order and into traffic. It too has a magnet triggered "horn", it actually sounds a bit like a demented sheep - but I digress. The sound part of the enterprise is on a circuit board that fits underneath the bonnet and (from memory) was powered by a 9V battery. It doesn't intrude into the cab like the one shown.

I too would be very interested in the original prototype for the LGB model, because over time, mine had lost most of its external detail and it would be good to put it back into something like a real Schoma locomotive. MIne is heading towards becoming a kind of CFD French diesel currently

Tony
 
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