This is the most Realistic steam chuffer on the market.
it is manufactured by us and is ideal for insert into a g scale tender or to use as a stand alone product .

It uses voltage sensing circuitry to adjust the chuff rate
with 0 volts a steady hiss of steam can be heard advance the track control slowly
and the steam volume rises and starts to make a deep chugging sound mimicking the cylinders labouring
as you increase speed so a more mellow chuff is heard

Slowly reduce speed and chuff rate slows on stopping the train excess steam can be heard for about 10 secs
and them dies down in volume to a quite steam hiss .
The unit has just two controls that once set can be left alone.
One to adjust the starting chuff rate this is because different train motors have different starting voltages
The other is a volume control there is a small amp board with all connections that also has a small loudspeaker
but don't be fooled by its size unit is powered by two pp3 batteries and comes with simple set-up instructions.

The board measures 3½ inchs by 2 inchs (9cm x 5cm) .
Speaker for gscale is 6 cm

This board uses no preprogramed chips its a total analogue concept that uses enveloped white noise
dcc sound controllers increase there speed/chuff rate in steps this has a totaly
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