Some may have seen my attempts at building a good discrete amplifier on here, but I thought of something.
Maybe making the current limiting resistors lower and lowering the supply from 7.2V or 14V down to 5V but this supply would be fed though a 7805 or similar regulator.
I asked this because I ran my older amplifier model (no bridging) and on a fresh battery the sound is nice and loud but on a battery that's half dead, the sound has more distortion and is quieter, and by lowering voltage and resistor values (slightly), I may get better sound volume and probably no heat from the transistors.
I did a simulator test on my latest model with 5V supply and 56 ohm resistors in my bridged class AB amp and the output currents are 283mA and converting that to wattage means under 2 watts which allows the power transistors to run without heat sinks.
So I'm thinking if I make my source say 14.4V and give the amp circuit power through a 5V regulator fitted with a heavy heatsink then as the battery is losing power the audio volume stays the same for a little longer (at least until the 14V source drops below 5V).
And I'm thinking if this way works, I might have to find a regulator with higher specs.
So is it sensible to use a regulator here or would that be a waste?
Maybe making the current limiting resistors lower and lowering the supply from 7.2V or 14V down to 5V but this supply would be fed though a 7805 or similar regulator.
I asked this because I ran my older amplifier model (no bridging) and on a fresh battery the sound is nice and loud but on a battery that's half dead, the sound has more distortion and is quieter, and by lowering voltage and resistor values (slightly), I may get better sound volume and probably no heat from the transistors.
I did a simulator test on my latest model with 5V supply and 56 ohm resistors in my bridged class AB amp and the output currents are 283mA and converting that to wattage means under 2 watts which allows the power transistors to run without heat sinks.
So I'm thinking if I make my source say 14.4V and give the amp circuit power through a 5V regulator fitted with a heavy heatsink then as the battery is losing power the audio volume stays the same for a little longer (at least until the 14V source drops below 5V).
And I'm thinking if this way works, I might have to find a regulator with higher specs.
So is it sensible to use a regulator here or would that be a waste?
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