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Old 16th March 2013, 01:06 PM   #1881
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Hi everyone.
I have just completed drawing my own PCB based on the symmetrical design that has been already posted here. This PCB design has wider tracks.

Please, if someone can check whether there are any errors in it. If everything is OK, than I will share the files in PDF format, so everyone can use them.

Thanks.
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Old 16th March 2013, 01:47 PM   #1882
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very intersting i can't wait to try it specialy after u posted the pcb pattern .... thanks alot apex
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Old 16th March 2013, 04:22 PM   #1883
panggih is offline panggih  Indonesia
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Mr.Mile, this is my ax14. the problem is still the same as the time it C.without input connection, and then immediately turned ax14 cried like horn, huuumm, and noisy.
I also tried to remove the capacitor 100nF then I replace it with a jumper, but the result is still the same. please correct my mistake
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sorry for english
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File Type: jpg track.jpg (23.0 KB, 989 views)
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Old 17th March 2013, 12:58 PM   #1884
wiljj78 is offline wiljj78  Philippines
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Default Did you check this point??? looks like it's shorted

Try to post clear pictures and measurements (rail voltage,DC offset, etc) it will be more easy to all diy freinds to help...

Regards,
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Old 17th March 2013, 01:15 PM   #1885
cjkpkg is offline cjkpkg  United States
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Quote:
Originally Posted by panggih View Post
Mr.Mile, this is my ax14. the problem is still the same as the time it C.without input connection, and then immediately turned ax14 cried like horn, huuumm, and noisy.
I also tried to remove the capacitor 100nF then I replace it with a jumper, but the result is still the same. please correct my mistake
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sorry for english
Please sketch out your grounding scheme.

What worked for me was rca input ground to amp board
Input ground to chassis star ground
Amp board ground to PSU ground
Speaker ground to PSU ground

I did try the third suggested wire from input ground to PSU ground but found the amp to be most quiet without that connection.
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Old 18th March 2013, 05:36 AM   #1886
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Quote:
Originally Posted by wiljj78 View Post
Try to post clear pictures and measurements (rail voltage,DC offset, etc) it will be more easy to all diy freinds to help...

Regards,
My experience was connect input rca ground into PSU ground fixed my systems' problem...before you hook your amp to your speaker, please measure the dc offset first..
state here your dc offset first...what rail voltage do you have?
Best Regards
Arif B
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Old 18th March 2013, 05:02 PM   #1887
lycanlk is offline lycanlk  Sri Lanka
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Default Apex B80 as a car amp with an SMPS

Thank you Mile for the simple and powerful design! good enough for a 10" woofer. Next step is D200.with +/- 75v supply and with low Rds drivers
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Old 18th March 2013, 07:58 PM   #1888
44250 is offline 44250  Serbia
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you will have a lot of power with d-class amp that´s for sure! what power is that smps? it look´s really simple...
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Old 18th March 2013, 09:16 PM   #1889
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Quote:
Originally Posted by lycanlk View Post
Thank you Mile for the simple and powerful design! good enough for a 10" woofer. Next step is D200.with +/- 75v supply and with low Rds drivers
Nice work,
Regards
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Old 19th March 2013, 04:11 AM   #1890
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Hi all friends
i want use AX14 instead B80 in my car
can i use AX14 in 2 ohm load ?
any suggestion?
what about D14 ?
sir mile use it in home.
thanks

Last edited by Hadighorbani; 19th March 2013 at 04:15 AM.
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