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