how to convert this amplifier to an 15/18V supply?

[No ideas]

i kinda dont like the idea of the capacitors being between the stages

 

[xXBrunoXx]

kinda dont like the idea of the capacitors being between the stages

Parallel one 10uF electro with one < 1uF film cap.

 

[cumbb]

if i were to use bjt's id need a gain stage such as this one or an single transistor and an transformer
View attachment 1371610

Maybe, you won't. Just build and listen;-) Then react.

 

[No ideas]

im listening right now, heat is an issue i used an bigger heatsink and still nothing maybe an 1 ohm source resistor is an good idea?

 

[No ideas]

i used two 0.33's in parallel and i dont have any issues

 

[No ideas]

this circuit sucks or rather my sources suck, i should get that usb galvanical isolator and try it again

 

[No ideas]

no the power output would godown too much

 

[No ideas]

im using it right now and its already down too much with 0.66

 

[No ideas]

speaker*

 

[No ideas]

aroun 0.7V in and 2V out compared to 7 volts out at 0.33

 

[No ideas]

There' s smth that makes me believe that this class B 12 V car player of the 60' s beats the hell out of this zen design ...

maybe i have a lot of NOS 2n3055's and all the mounting brackets needed

 

[No ideas]

i just want to use amp transistors and make something that makes sound

 

[No ideas]

i found an dongle dac plugged it in and the amp sounds great

 

[No ideas]

yes i also think that i should drive it with an op amp if i were to use an preamp anyway, main issue i have is weird biasing

 

[No ideas]

so the signal source was not that great...

yes the only issue here is volume control

 

[xXBrunoXx]

If you really want class A build this instead .
Why not Class AB ? , way better efficiency and tons of builds with great numbers on this forum.

 

[No ideas]

for class ab i have a bag of 2n3055. main issue is complexity becuse most designs add a lot of extras constant current sources etc. by simple i mean a long tail, pair diode/resistor biasing and an bootstrap circuit.

 

[xXBrunoXx]

@No ideas Simplest Long tailed pair with constant current and current mirror, just 4 more transistors, and a few resistors.

 

[No ideas]

Maybe, you won't. Just build and listen;-) Then react.

done sounds good i just need a way to add the volume contol without the potentiometer contributing to an high pass filter.

 

[No ideas]

@No ideas Simplest Long tailed pair with constant current and current mirror, just 4 more transistors, and a few resistors.

at this point i think copying the ltspice "audio amp" example and making few changes is the best course of action