Hi,
Toying with gutting the dead pre-amp section of a solid state combo and building a ROG Ginger into it as a bass practice amp for my son. I've got +/- 15V available, can I run the Ginger at 15V (assuming e-caps suitably rated)? If on 9V the JFET drains are trimmed to 6V, 2/3 of supply, then use 15V and trim to 10V? Or is it going to screw up the gain structure and distortion (not that I particularly want it for distorted purposes).
Failing that I can regulate down to 9V.
http://www.runoffgroove.com/ginger.html (http://www.runoffgroove.com/ginger.html)
Sure, it'll even have more headroom and probably will sounds better.
For the jfet voltages, is not that they should trimmed to 2/3 of the voltage supply. The best way to bias them is to set the voltage to around 1/2 of the supply, then fine tune them by ear. So you'll be around 1/2 to 2/3 of the voltage.
Perfect, thank you!