Hi guys and gals,

Sorry for posting off topic, but I'm still waiting for response on the MERG forum, and I know you guys would chip in quick.

I've breadborded a liniar pulese controller for my sons model railway outlined in the following MERG technical builletin http://www.micro-heli.co.uk/T27_1_1.pdf

However it doesn't actually produce a zero output because the injection of the 50hz pulses is still enough to cause some lococ to run at the minimum setting. Can anyone suggest a modification to the schematic on order to give a better control. I did think about connecting the 270K resitor to the wiper of the pot rather than after the 100K resistor, but I'm not sure if this will have the desired effect as it could be taking the half wave rectified pulse to ground via the 270K resistor when the wiper reaches the end ?