Power supply, wiring...charge pump issue.

[fixr1984]

I dont quite understand the power supply issue with this. I made the stage center reverb
from GGG Here
Another layout uses a charge pump to supply the 18v. I dont want to make a pump, I was hoping to
just use an 18v power supply.

Can I simply just use the + and - from that supply as the blue and red wires?

If so what about the ground that is connected to the batteries?

I guess what is throwing me off is the way they have the 2 batteries wired.
This is the whole project at GGG

[petemoore]

  SCR uses a bipolar supply.
  "Ground is Vbias, right between the rails, V+ is 9v from ground, V- is 9v from ground.
  The easy way to get this is connect opposite colors from each of two battery clips for 'ground.'
  That leaves a red [goes to V+
  and a Black [goes to V -
  MAX 1044 stars looking like a good option if you have 9V supply.
  another option is start with 120VAC to primary of transformer, center tap secondary for ground, secondary taps to a diode bridge/filtercap to make say 15vdc +/-, then a 7809 voltage regulator [and cap] for each +/- supply.

[fixr1984]

After reading a little deeper I see what you mean about needing a bi-polar supply. I was trying to avoid
building a charge pump cause I would have to order the max1044.
I was planning on mounting this inside an amp rather than in pedal form. What I'm trying to
avoid is to have a battery internally that I would have to take the amp apart to change, but I dont want
to have plug anything extra in. I would like the power supply to be inside.
Could I power the charge pump with  a 9v transformer and mount it inside the amp and  splice into the 110v coming from the wall?
I didnt know if putting another transformer in parallel with the main PT would be a bad idea.