2010 Track Circuit Question

[AndyM]

Hi Peter et al,

Any comments on my attached attempt on the 2010 question appreciated. I fell into the trap with the Resistivity being quoted with wrong units (annoying - and I should really know better!). My final part with the chnage in resistivity ends up with an unworkable track circuit due to Ballast Current draw.

Sitting Mod5 in couple of weeks so any feedback welcome.

Thanks,

Andy M