Doepfer

Hi David

> the positive supply goes to the 7809 with a cap either side between the positive and gnd and the 7809 grounded on one pin?
yes.

> Are the caps anything special i.e. tantalums?
For the filtering caps - I do not know how they are called in english. 
I'd say: polycarbonat foil capacitors. 35Volt.


Florian