150W MOSFET Amplifier with IRFP250x2

44250 · 2011-12-23 7:59 pm

AX12(B80) in progress:

Hope i will soon finish it and tell something about it´s power and sound,the NX sounds great,it has a lot of power and very very clear sound in all stages,and i am very happy to have an amplifier as NX!

44250 · 2011-12-23 8:12 pm

And one more thing,the AX12 will work at 2 x 50-60W of power due to smaller transformer power. I am building it to hear how it works,and to hear how the darlingtons work in pair!

apexaudio · 2011-12-23 10:07 pm

Nice progress, with single pair of outputs and without overcurrent detect new pcb can be very small.
Regards

wattaniya · 2012-01-28 8:14 pm

apexaudio said:
For all aplication especialy for subwoofer I recomend you Kelvin amplifier without VI limiter. You also need active X-over for subwoofer.

hi apex sir,
can u share the kelvin amp pcb top and bottom layer in pdf.

44250 · 2012-01-29 10:12 am

Here it is...

44250 said:
And one more thing,the AX12 will work at 2 x 50-60W of power due to smaller transformer power. I am building it to hear how it works,and to hear how the darlingtons work in pair!

AX12

APEX AX12 u 44250 izvedbi/done by 44250 strano - YouTube
APEX AX12 u 44250 izvedbi/done by 44250 doma?e - YouTube

44250 · 2012-01-29 10:24 am

One more thing-i was listening this amplifier yesterday whole day,and in a few moments in a few songs i was pleasantly surprised how deep can it go! One thing is for sure-this amplifier that i have built deserves a proper transformer and more than 10 000uF per rail in PSU,to get it´s maximum performance although it sound good as it is. Cheap and very very good amplifier-I RECOMMEND IT!

apexaudio · 2012-01-30 11:13 pm

44250 said:
One more thing-i was listening this amplifier yesterday whole day,and in a few moments in a few songs i was pleasantly surprised how deep can it go! One thing is for sure-this amplifier that i have built deserves a proper transformer and more than 10 000uF per rail in PSU,to get it´s maximum performance although it sound good as it is. Cheap and very very good amplifier-I RECOMMEND IT!

Nice work, but you post in wrong thread. AX12 is from thread: http://www.diyaudio.com/forums/solid-state/164093-100w-ultimate-fidelity-amplifier-116.html
Regards

44250 · 2012-01-31 9:22 am

apexaudio said:
Nice work, but you post in wrong thread. AX12 is from thread: http://www.diyaudio.com/forums/solid-state/164093-100w-ultimate-fidelity-amplifier-116.html
Regards

Done!

http://www.diyaudio.com/forums/soli...imate-fidelity-amplifier-116.html#post2885214 post #1154

Sorry for mistake...

sanbadgujar · 2012-08-27 6:13 am

HI apexaudio can you tell supply requirment for Kelvin amplifier from your post #34 is it 40-0-40 5A transformer required or different and please can you give me PSU PCB layout
Thanks

sanbadgujar · 2012-08-28 5:37 am

HI apexaudio I steel waiting for your replay

azlospux · 2012-10-08 8:50 am

Hie Apex, i am in the process of building my Kelvin amp, is it ok if i use 2SC 5200 on my output

apexaudio · 2012-10-08 9:19 am

azlospux said:
Hie Apex, i am in the process of building my Kelvin amp, is it ok if i use 2SC 5200 on my output

Outputs must be darlingtons.

wattaniya · 2012-11-03 8:12 am

hi apex sir,
can i use irfp260 for nx14?
if u don't mind pls share nx14 layouts in pdf.

44250 · 2012-11-03 7:34 pm

I believe that all of APEX files are in jpg format.

wattaniya · 2012-11-04 3:56 am

thanks for the image 44250,

44250 · 2012-11-04 5:44 am

85,2 x 60mm is a size of the pcb.

wattaniya · 2012-11-04 5:52 am

thank u 44250.

AndrewT · 2012-11-04 12:23 pm

Can we have actual PCB size printed onto the layout of every PCB we see posted on this Forum?

44250 · 2012-11-04 1:01 pm

I don´t know what to say,for all APEX projects i have printed as "Actuall size" and havent any troubles yet. That was with HV23,NX14 (16),APEX PROTECT+CLIP PSU,APEX PSU7,APEX AX12...

Anyway here are some dimensions that i have found at forums here in Serbia and at diyaudio.com:
APEX 550w class B PCB size 110x105mm
APEX A75 LM3886pcb PCB size 53x25mm
APEX AX12 size 47,5x82,5mm
APEX AX14 PCB size 60x82,5mm
APEX B200 tda 7294 stereo/bridge PCB size 115x62,5mm
APEX B500 Component 220x52,5mm
APEX D14 PCB size62,5x82,5mm
APEX G100 bas guitar PCB size 260x95mm
APEX H900 PSU PSU PCB size 105x70mm
APEX HV23 PCB size 200 x 50mm
APEX HV350 PCB 200x50mm
APEX NX14 pcblayout NX14 pcb size 82,5x60mm
APEX ML3 Mic volume Tone Preamp PCB size 100x40mm
APEX Protect and Clip PSU PCB size 90x130mm
APEX PSU5 pcb 140x90mm
APEX PSU7 PCB PCB size 200x75mm
APEX A-class Shunt Regulator PCB 80x77.5mm
APEX X1 sub PCB size 60x50mm

That is all i have of written dimensions. When i come in that dilema,i usually take a measure of IC,relays or transistors components at jpg. and than adjust width and height of pcb if needed. My first print is usually at everyday printing paper so i can compare ic/transistor/relay pinout directly with layout just to be sure. Hope i helped at least a little bit...

smartx21 · 2012-11-04 8:55 pm

44250 said:
When i come in that dilema,i usually take a measure of IC,relays or transistors components at jpg. and than adjust width and height of pcb if needed.

That´s what I would expect from the wise DIYer. As I usually say, to the good listener, half a word is enough!

150W MOSFET Amplifier with IRFP250x2

Member

Attachments

Member

Member

Member

Member

Attachments

Member

Member

Member

Member

Member

Member

Member

Member

Member

Attachments

Member

Member

Member

R.I.P.

Member

Member