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Old 17th April 2013, 10:24 PM   #531
44250 is offline 44250  Serbia
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Quote:
Originally Posted by norazmi View Post
use main supply in series with bulb when first time power on . btw if your component is the same what apex showing and mount them correctly, dont be rush, check every component and trace, im sure this amp will work nicely. most ppls do modified with another value component because they dont have exactly component listed by apex, so there is the problem, when u want build class D amp who already testing and running, you need to have commitment for all part list with the same value and type.

p/s - there is no shortcut to make it more easy
that is exactly the way i plan to do it. all APEX amplifiers i did up till now worked at first plug-in unless i made a mistake. after removing mistake they are working all right and with no problems at all.

i did one smps,and there i used that "trick" with light bulb,that is what i will use now too. when ever i did ab or b-class amp i used 20W 17R resistors in series with power supply rails just to make sure that the amp works fine.

thanks for moral support man!

PetruV,i will make pcb as APEX suggested,not on perfboard.

hope i will soon write here and post some pictures
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Old 19th May 2013, 05:15 PM   #532
lycanlk is offline lycanlk  Sri Lanka
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Default My D200

I wanted to redraw D200 since I need more space on the pcb. Not sure that I have made any mistakes.
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Old 19th May 2013, 05:20 PM   #533
lycanlk is offline lycanlk  Sri Lanka
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Default missing jumpers..

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Old 19th May 2013, 07:29 PM   #534
44250 is offline 44250  Serbia
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have you compared gate charge of those two transistors at output? i am not suggesting anything since ia haven´t checked that eather yet but that would be the most important thing...

another thing - if you can make pads a bit wider,that narrow will be weak to the soldering temperature.

otherwise it looks ok to me.
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Old 3rd June 2013, 05:25 PM   #535
lycanlk is offline lycanlk  Sri Lanka
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Default My new PCB

Tested my new pcb today. Gives a very high siren noise after 2 seconds when I touch the inputs.

tested +/- 5.6, ok.
12v ok
5v ok
used irf540n with +/-30 volts

When I checked outputs with the meter it says 106Khz
All worked well with Apex's D200 board.
But what could be the reason for this siren sound in my board?

regards.
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Old 4th June 2013, 03:59 PM   #536
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Quote:
Originally Posted by lycanlk View Post
Tested my new pcb today. Gives a very high siren noise after 2 seconds when I touch the inputs.

tested +/- 5.6, ok.
12v ok
5v ok
used irf540n with +/-30 volts

When I checked outputs with the meter it says 106Khz
All worked well with Apex's D200 board.
But what could be the reason for this siren sound in my board?

regards.
Change some tracks.
Regards
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Old 1st October 2013, 08:10 PM   #537
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Apex D200 on +/- 66V - YouTube
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Old 5th October 2013, 06:47 PM   #538
44250 is offline 44250  Serbia
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Quote:
Originally Posted by apexaudio View Post
Smps & Apex D200 - YouTube
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Old 6th October 2013, 03:22 PM   #539
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sir can u pls share ur smps witch one u show on this video ... thanx .
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Old 10th October 2013, 02:05 AM   #540
nugroho is offline nugroho  Indonesia
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Quote:
Originally Posted by PetruV View Post
yep know that feeling,it happens a lot to me,if it dosent work no one can help you,i tried building many amps but only one worked,for the others people didnt know how to help me
hai petruv, i think you have problem with the pcb, look like it finish with bad result. many diy'er get that result in their work, but after many experiment and learning what other people do with good result i believe success will be with you

1. make sure the pcb result free from short between track, crack or lost connection cek with ohm meter.

2. make sure you use a good quality component since now there is many counterfit component in the market, i am had that when i build APEX H900 amp, the ic NE5532 was bad quality or counterfit

3. always learn your soldering skill that have good result/ max joint, make sure there is no short between track or dry joint

4. cek once again then test with supply for fist time, before that place 20ohm/10W resistor on + rail and -rail or place 60W/220v bulp series with primer tranformer, if there is any trouble will save your valuable component

5. if there any problem with the result, share with us, many people in this forum will help you

regard

Last edited by nugroho; 10th October 2013 at 02:10 AM.
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