Thanks for the replies,
AHH I see, I think?
I drew the A & D grounds back to front.
So, I have the A Ground Plane & D Ground Plane seperate & I connect these together at a single common point.
There is a 100uF PS Cap, is this a good place to join both ground planes?
When I make up the circuit board, what distance should I have between the two ground planes to avoid any issues?
I will be using an Aluminium enclosure.
Battery & Wall type power supplies, provisions for both.
I have to admit I have only been using NON isolated jacks for everything, could you explain why & where I should be using Isolated jacks.
Cheers