Solid State Guitar Amp Forum | DIY Guitar Amplifiers
Solid State Amplifiers => Amplifier Discussion => Topic started by: iTzALLgoOD on December 05, 2007, 07:06:02 PM
I got a hold of a couple of battery back-up (the ones for your computer) transformers. I'm guessing that they are 12-14 volt and maybe 7-10 amp. Would this be something that I could use for a chipamp? I am only a little bit familiar with power supply's. Is it possible to build a suitable power supply with a simple but beefy transformer? Thanks for any info. John
Well, yes, "simple but beefy transformer(s)" are useful for building amps with. That said, I don't think you will be able to use a transformer only kicking out 12-14v. After rectification you would be right around +/-10v, which is enough to power a LM1875, but only to 4-5 watts (maximum power output is 30watts using +/-30v). You could tie two or more transformers together to get higher voltage though.
What about a voltage doubling circuit. I should still have enough amperage. Or are those a bad idea for audio applications. Either way I do have 2 of them.
Quote from: iTzALLgoOD on December 06, 2007, 02:03:20 PM
What about a voltage doubling circuit. I should still have enough amperage. Or are those a bad idea for audio applications. Either way I do have 2 of them.
I'm going to guess a voltage doubling circuit would add noise to the amp, also it complicates the amp building quite a bit.