LGB 20212 Stainz Smoke Generator - what voltage?

homestyal

homestyal

Registered
Having found that my existing smoke generator has packed up, I'm going to replace it with a new one.

Looking through the catalogue, there are three to choose from, being 24v, 18v and 5v, part numbers 65553, 65803 and 65853 respectively.

Which is the correct one for my Stainz - can anybody help?
 
homestyal said:
Having found that my existing smoke generator has packed up, I'm going to replace it with a new one.

Looking through the catalogue, there are three to choose from, being 24v, 18v and 5v, part numbers 65553, 65803 and 65853 respectively.

Which is the correct one for my Stainz - can anybody help?
Click to expand...

Ease the smoke generator out from the funnel and make a note of the colours of the two leads.
My guess is that it's a 5V unit with one black and one white wire.
If so you may wish to purchase an identical nominal 6V Graupner replacement as they are better value for money, see this link.
http://www.cornwallmodelboats.co.uk/acatalog/model_electronics.html < Link To http://www.cornwallmodelb...model_electronics.html
A word of caution, I have sometimes found that LGB circuit boards supply greater voltage than the nominal, it may be worth measuring with a voltmeter and considering some remedial action if it's much more than 6.5 to 7V with a working smoke unit.
 
Homestyal: You do not need to replace your existing smoke generator, you need to set the cv value for funtion 1 output voltage to 32. I do not remember the actual cv # and i do not have immediate access to the information, but I think it is cv 49 for Massoth and LGB decoders. I wonder if your lights are dimmer than they were before the conversion. If so, you would need to set the cv value for the relevant cv#( I think is cv 50) to 32 as well.

Mohammed
 
Thanks Mohammed,

CV49 Voltage for F1 32=loco with decoder interface, 5=direct connection of 5v lights and 26=direct connection of 19v lights.

CV50 Voltage for lighting terminals.

So to be clear, my Stainz which I have fitted a LGB 55021 decoder needs to have it's CV49 voltage changed to 32. If my lights are dimmer, I set CV50 to 32 also?

I'll let you know how I get on......watch this space!

Thanks everyone for your help.

Rick
 
homestyal said:
Stainzmaster: Do you set the CV to the voltage of the generator i.e. 5v, 18v & 24v, or as Mohammed suggested, set the voltage to 32v?

Rick
Click to expand...

No, he meant you set the CV to 32. This is not 32v !!!!! :)

(and thats if the loco has a decoder interface)
 
Doug said:
homestyal said:
Stainzmaster: Do you set the CV to the voltage of the generator i.e. 5v, 18v & 24v, or as Mohammed suggested, set the voltage to 32v?

Rick
Click to expand...

No, he meant you set the CV to 32. This is not 32v !!!!! :)

(and thats if the loco has a decoder interface)
Click to expand...

So, irrespective of the generator voltage, CV49 should be set to 32 for F1 when fitting an LGB decoder with decoder interface. This is the only bit I need to understand now, then I'll be happy :)
 
homestyal said:
Doug said:
homestyal said:
Stainzmaster: Do you set the CV to the voltage of the generator i.e. 5v, 18v & 24v, or as Mohammed suggested, set the voltage to 32v?

Rick
Click to expand...

No, he meant you set the CV to 32. This is not 32v !!!!! :)

(and thats if the loco has a decoder interface)
Click to expand...

So, irrespective of the generator voltage, CV49 should be set to 32 for F1 when fitting an LGB decoder. This is the only bit I need to understand now, then I'll be happy :)
Click to expand...
Oppps some overlap in postings/corrections going on here!!!!
Some expert on LGB decoder will be able to tell you for certain, but i think not! My understanding is (from the above posts and having read some DCC books in the past):

CV49 is set to 32 when the loco has a decoder interface board in it (ie another circuit board that sits between the decoder and the smoke unit).
OR set CV49 to 5 when a 5v smoke unit is wired directly to the decoder,
OR set CV49 to 26 when a 19v smoke unit is wired directly to the decoder.

Or possibly not - see Paul's post below!!!

Why they use these numbers is due to 'bits' being set in memory, these act as on/off switches for various parts of the decoder
 
Now I am confused.

If I fit a decoder to the interface (i.e. plug it into the sockets of the main board) where the smoke generator is 18v (wires= one grey one black), what value do I set cv49?

I'm not sure if you can interpolate to calculate values! But until advised differently 27 = 18v / 8or 9 = 5v. So what's the value for 24v?
 
All I can say is - thank goodness I'm still analogue (even my railway is) - I've followed this thread and am more confused than when it started!

Mick
 
trammayo said:
All I can say is - thank goodness I'm still analogue (even my railway is) - I've followed this thread and am more confused than when it started!

Mick
Click to expand...

I've had little experience of digital and therefore may be way out.
As I see it some locos have a board designed to supply lights, smoke etc with a steady 5v for use on analogue and also have connections to plug in a chip. On these I guess the chip may be programmed to supply full track voltage to the board's light and smoke functions as the board reduces this to 5V. You have the option of wiring the lights, smoke etc directly to the chip (if no board then of course you have no choice) and programming the chip output(s) to a suitable level(s).
 
Neil you are certainly correct with newer locos with the interface (long plug with 10 wires in a single row). I am not so certain about the slightly earlier models with the LGB 'direct decoder' socket (grey plug with 6 wires). Hope someone can enlighten us.

It has been suggested that wiring a 5V smoke direct to the decoder may overload that function (300 mamp I think) - thats why some people replace with a 24V smoke wired to the wheels pickup. Of course now you get to the odd situation of being able to wire the 24V smoke to the board and increase the board voltage to full track power because the current will be a lot lower with a higher voltage smoke unit. - I think!.
 
Actually CV 49=32 means full track voltage will be available to function 1 output terminals. All other values of CV 49 represent a proportion of full track voltage.
So if the track read 21v that's what you would get at function 1 output terminals if you set CV 49 =32, and 10.5 v if you set CV 49 = 16.
This is true when there is no decoder interface board. When a decoder interface board is involved, the voltage will be determined by the presence or absence of a stabilization circuit.
 
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