Hello to all
I have the GGG Lm3886 poweramp up and running on a +/- 24V 3A transformer.
It works great but I´d appreciate some guidance to take things one step farther. I would like to hook up my Professor Tweed or Dr Boogey or any similar project as a permanent preamp but I´m not sure how efficient the power transfer is.
R.G gave an excellent clue on the diystompboxes forum ...." The LM3886 is not stable with gains below 5. With a gain of 22, you need about 1.4V peak to drive it to full excursion with a +/-30V power supply. That implies a preamp gain of about 14 to 20 for full undistorted power from a single coil guitar. "
Well I guess my question is: How do I calculate the gain out of a Professor Tweed from a typical guitar signal? At what voltage would the Tweed need to be powered to get as close to max power out of the 3886 without clipping?
Hope someone can help, Daniel
I have the GGG Lm3886 poweramp up and running on a +/- 24V 3A transformer.
It works great but I´d appreciate some guidance to take things one step farther. I would like to hook up my Professor Tweed or Dr Boogey or any similar project as a permanent preamp but I´m not sure how efficient the power transfer is.
R.G gave an excellent clue on the diystompboxes forum ...." The LM3886 is not stable with gains below 5. With a gain of 22, you need about 1.4V peak to drive it to full excursion with a +/-30V power supply. That implies a preamp gain of about 14 to 20 for full undistorted power from a single coil guitar. "
Well I guess my question is: How do I calculate the gain out of a Professor Tweed from a typical guitar signal? At what voltage would the Tweed need to be powered to get as close to max power out of the 3886 without clipping?
Hope someone can help, Daniel