Bipolar Bear - Proposed Layout Correction (Dual NP & SP Layout)

[MAO]

Alex,

I believe there needs to be a link between the T1, T3, and T5 drains and the junction of 120R, 22k, 100u and 100n. (I think this connection was mistakenly left off the North Pole schematic)  

I also think the N. Mids control is backwards.  

[Hozy31]

Has the image shifted?

[MAO]

No, I was only showing the changes to the layout, with a couple additional "unchanged" components as a reference.

 So  only the lower right side of the board is shown.

Sorry for the confusion, If  I get a chance I will draw up the rest of it tonight.

[Hozy31]

Cheers Mike.

[MAO]

Here is how to get the North Pole working it if you have already populated the original layout.

Solder a wire from the bottom of the pictured 22k resistor to the pad directly above the same resistor.

You may need to flip the North Mids connections too.

EDIT: 02/09/2016 You should also reduce or jumper the leftmost 120R resistor. This will increase the supply voltage (and headroom) to the South Pole side of the circuit. (Recommended by David Rolo himself here)