On 3 January 2015 at 12:02, <alan.b.pearce@stfc.ac.uk> wrote:

> ... ...
> As various model railroaders have found when fitting a digital decoder,
> ...
>

Sliding 0.2 to 1 Hz frame rate , about 30% duty cycle, add white noise.
Chuff ........ Chuff ...... chuff .... chuff ..

I wonder how many younger ones have actually heard a 'real' steam train
starting?



                  Russell
--=20
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