900W H-class PA Amp with Limiter

[moore4889]

look PIC ?

how do you generate 18 V ?

separete PSU or from 140 V VCC / VSS with Resistor and Zener ?

i use seperate 18 0 18 vac trnaformer..as seen at the bottom..

i used 2 core just for test ...it reads 10uh...

 

[stewin]

Stewin, also puts an oscillogram at the frequency of 1khz.Thanks.

hi dorel ,it was not my work but the expertise of m.r moore4889

 

[deo]

The attachments from moore4889 could not be seen, but if you can picture it at 1khz it would be great.Greetings,

 

[Agus sugiono]

hi sir ... want to ask, if you make 3 steper ic IR2117, what size zener diode input for HV and LV?

 

[Agus sugiono]

can send the scheme to my email
power150an@gmail.com

 

[moore4889]

The attachments from moore4889 could not be seen, but if you can picture it at 1khz it would be great.Greetings,

 

[stewin]

thanks for the simulations and photos but please post bigger pictures

thanking you in advance steven.

 

[deo]

If you can at 30-40V rms at 4 ohms, and at a higher resolution?Thank you,

 

[NMOS]

Hi moore

Great, but do you know switching frequency from TD Rails `?

apex talk about something 50 khz,

can you check whats switching frequency from your TD Rail ?

regards

 

[redmx]

Gerbers

TD 1800 SCREEN SHOTS

Please send gerber files , nice work plis
Peterlubing@gmail.com

 

[suryadi5417]

TL 071

Still love the old school .....

 

[Julio25]

greetings sir apexaudio..i have already build your B500 sir..i would like to ask what is the power of this H900 TEF sir?thanks and regards

 

[hespiritu2014]

Nice work, dont forget wire jumper.

what is the red colred wire here dude

 

[hespiritu2014]

Yes, and 2x18V 500mA, but not bound.

do you have pcb layout of the attached file sir

 

[vedmitraa]

I have completed TD 1800 as per schematic , but having problems, which along with marked photos I am posting. please Mr. Miles Guide
Positive side high voltage dropping too much, Amplifier section is similar to your h-900 but I can see changes, which I have marked.Also am confused as in some photos, positive side 5 watts resistor is of 10 k ohm , whilst in schematic it is 2.2 k ohm, Also capacitors in schematic are 3.3 uf and 10 uf. whilst in photo all 4 capacitors are 3.3uf. which also I have marked, I was able to switch on audio with 18-0-18 volt d.c., but biasing milli volt is too high 570 milli volt base to emmiter output transistor. please guide.

 

[hespiritu2014]

View attachment 804399

do you have pcb layout of the attached file sir

please give me black layout of the board sir, thanks a lot

 

[vedmitraa]

Lab gruppen 3600 schematic and p.c.b. layout photos

 

[NMOS]

I have completed TD 1800 as per schematic , but having problems, which along with marked photos I am posting. please Mr. Miles Guide
Positive side high voltage dropping too much, Amplifier section is similar to your h-900 but I can see changes, which I have marked.Also am confused as in some photos, positive side 5 watts resistor is of 10 k ohm , whilst in schematic it is 2.2 k ohm, Also capacitors in schematic are 3.3 uf and 10 uf. whilst in photo all 4 capacitors are 3.3uf. which also I have marked, I was able to switch on audio with 18-0-18 volt d.c., but biasing milli volt is too high 570 milli volt base to emmiter output transistor. please guide.

which coil T-157 ?

how many turns ?

do you have

 

[andrewlebon]

TD3600

 

[vedmitraa]

Greetings Mr.Nmos,
As one can see from the photos I have posted I used Stacked blue cores and 28 turns to obtain 100uh.