Hi everyone!
It's my first post here. I have been messing with electronics for almost a year now, made about half a dozen pedals, another half a dozen waiting on the shelf, and I also have an 18watter in progress.
Recenlty, the only amp I've been using is the Noisy Cricket (my first complete build), and I was amazed at how good a simple solid state amp can sound. So my interest turned to building a SS amp with enough power but still without the need for output transformer. The best option right now seems to be the TDA2040. Also I'm planning on putting a preamp such as the Umble plus an FX loop.
1) Can I use the schematic from general guitar gadgets for a bipolar power supply to power the amp?
If yes, I guess that the appropriate transformer would be one with 12V secondaries, and the regulators should be 7809 and 7909 so I can provide +9V and -9V?
2) If I want to make a complete amp with preamp and poweramp, which I can power straight from the wall, can I use an additional 7809 regulator with the appropriate additional capacitors and diode, to provide an extra power output of +9V to power the preamp from the same supply, or will I need an extra transformer to make a seperate supply?
3) Lastly, If I want to use two TDAs for a 30W amp how could I power it? The bipolar power supply schematic at GGG has an option of +-15V ouptut or 18V, whereas a 30W TDA amp needs +-16V according to the datasheet.
-Adam-
It's my first post here. I have been messing with electronics for almost a year now, made about half a dozen pedals, another half a dozen waiting on the shelf, and I also have an 18watter in progress.
Recenlty, the only amp I've been using is the Noisy Cricket (my first complete build), and I was amazed at how good a simple solid state amp can sound. So my interest turned to building a SS amp with enough power but still without the need for output transformer. The best option right now seems to be the TDA2040. Also I'm planning on putting a preamp such as the Umble plus an FX loop.
1) Can I use the schematic from general guitar gadgets for a bipolar power supply to power the amp?
If yes, I guess that the appropriate transformer would be one with 12V secondaries, and the regulators should be 7809 and 7909 so I can provide +9V and -9V?
2) If I want to make a complete amp with preamp and poweramp, which I can power straight from the wall, can I use an additional 7809 regulator with the appropriate additional capacitors and diode, to provide an extra power output of +9V to power the preamp from the same supply, or will I need an extra transformer to make a seperate supply?
3) Lastly, If I want to use two TDAs for a 30W amp how could I power it? The bipolar power supply schematic at GGG has an option of +-15V ouptut or 18V, whereas a 30W TDA amp needs +-16V according to the datasheet.
-Adam-