DIY Good Class D amplifier

[Acca]

Hey,after 5h of listening music I checked offset.Measured 0,2mV!!!
What core do you think?
For SMPS two E35 and for class D yelow core from PC PSU,now changed with E33.

 

[Cresnet]

@ ACCA

where is the schematic?

 

[PetruV]

Two er35 and just 500w???,the things are huge,almost as large as ee42

 

[Acca]

Schematic in few days,not drawed yet.
Two ER35 can 700-800W,but my transistors is limit (13007).When using 13009 this power can be achieved.

 

[Acca]

Better fet driver,
Tested today
Schematic of amp. soon

 

[Acca]

Here's schematic of my amp:

 

[Acca]

Simple amp for begginers,and test of my amp on +/-55V,meter on speaker shows AC output at 4 ohm load.

 

[Acca]

Simple Class D for begginers,version 2 (better),with pcb :

 

[PetruV]

very good,but it needs two large capacitors on output

 

[Acca]

This cap's can be used for filtering power supply.Only add transformer and rectifier.

 

[PetruV]

im referring to the capacitors between the speaker and rails,these should be large for good bass if using single supply

 

[Acca]

Yes,I know.It can be used as filtering caps.

 

[aman khalsa]

hello sir can you pls share your smps ?? thank u

 

[Acca]

Ofcourse
Here's text about inductors,etc.
SMPS za pojacalo snage 500W - Smps - DiyAudioProject

And here is PCB,I plan to mount oscillator over/under rectifier pcb.

 

[Acca]

Class D amp with tube amp sound
I tried both versions,one same as sch. in attachment,and now listening to it.Another with classic feedback from Ucd amp works great.Better than SG when optimised
Sch. same as this,but without transformer and added small RC for feedback and resistor divider for gain.
You can experiment,bases of MPSA is + and - inputs of discrete op-amp

 

[Acca]

Sorry,these should be MPSA92,not 42.

 

[PetruV]

This looks so simple,i cant believe it. I might make a layout for it soon

 

[Acca]

You shouldn't make PCB,it's completed:

 

[Acca]

PCB is 100x50mm

 

[exflaco]

Acca limit in vcc wath vmos sugest,thanks