Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Amplifier Discussion => Topic started by: Fossilshark on August 03, 2018, 01:27:34 AM

Title: SS circuit design questions
Post by: Fossilshark on August 03, 2018, 01:27:34 AM
Hi, i haven't been on this forum in a bit but I've had some questions about SS audio (specifically guitar) circuit design:

I found this class AB circuit and built it with 3904/3906 and got a few watts quality out of it. Can i just pop in beefier transistors and raise the voltage to get more wattage? Do i need to worry about biasing?

If i want more wattage do i need a preamp circuit with more gain?

How would germanium transistors in the poweramp affect the sound? Even if its just a germanium PNP with a 2N3055?
Title: Re: SS circuit design questions
Post by: g1 on August 03, 2018, 12:33:16 PM
Sort of.  You need to back up that higher voltage with higher current capability of the power supply.  It's more about current than voltage.
Title: Re: SS circuit design questions
Post by: Fossilshark on August 03, 2018, 03:51:27 PM
Is the current increase due to just a higher voltage on the load resistance?
Title: Re: SS circuit design questions
Post by: Loudthud on August 04, 2018, 01:59:41 AM
I'm not trying to dampen your enthusiasm, but the chances of that circuit working without modification are not very good. If you want simplicity, try a chipamp circuit. Slightly more complicated are the circuits in this thread:

 https://www.ssguitar.com/index.php?topic=3747.0

The circuit I posted in reply #7 can be adjusted to accommodate just about any power supply.