20v PS to sub for +/- 9v batt type

[petemoore]

  Seems like it'd work, but I dont remember seeing type about it.
  I have the Marshall Sim, uses a -9v/Gnd/+9v Power supply.
  could a 20v power supply be used to bias the opamps, using a divider to produce a 'middle rail'...so as to use a 0v/10v/20v [to be connected respectively] replacing the -9/Gnd/+9 setup?
  0v would go where -9v went
  10v would be the 'middle' rail [where a +&- from each of the two batteries went].
  20v would go where +9v went.

[seanm]

That should work fine. I have done similar things with no problems.

I quite often use an opamp buffer to provide a very stable Vb rather than a voltage divider. If you have an opamp stage left over you might think about doing this.

[Johan]

with that many opamp's, you might want something sturdier then a regular voltagedivider..may I instead sugest a Low-Z solution like "R.G's biastrick" ( with LM386 ) or a spare opamp, the way I do it in the LA-light..otherwise it might tilt when you start hooking up more and more opamps...

johan

[RDV]

...or just build a dual supply. It's not beyond your capabilities.

RDV