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Old 22nd January 2011, 07:56 PM   #601
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AX14 wireing with speaker terminal
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File Type: jpg APEX AX wireing.jpg (421.3 KB, 1480 views)
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Old 23rd January 2011, 04:23 AM   #602
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Hi i'm a newbie in diyaudio, how and where to measure the quiescent current when adjusting the bias pot?

thanks
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Old 23rd January 2011, 06:12 AM   #603
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For BIAS adjust put 10R resistors instead fuses and set 500mV on them.
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Old 23rd January 2011, 08:34 AM   #604
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My amp doesn't work... 0V across fuses/10ohm resistors, 36V between + & - fuse clips, no smoke, no transistor heatups when adjusting bias pot, variable dc offset when no output load, but the speaker pops when connecting to output terminal... what could be the problem? does the driver transistors sensistive to heat? I think I overheated them when I soldered it to the pcb...

Thanks!
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Old 23rd January 2011, 09:52 AM   #605
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Quote:
Originally Posted by jlester87 View Post
My amp doesn't work... 0V across fuses/10ohm resistors, 36V between + & - fuse clips, no smoke, no transistor heatups when adjusting bias pot, variable dc offset when no output load, but the speaker pops when connecting to output terminal... what could be the problem? does the driver transistors sensistive to heat? I think I overheated them when I soldered it to the pcb...

Thanks!
Can you post pictures, do you connect input GND to PSU GND?
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Old 23rd January 2011, 11:24 AM   #606
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Click the image to open in full size.
Click the image to open in full size.

yup, i connected the input and output gnd to psu to gnd ground
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Old 23rd January 2011, 12:01 PM   #607
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How to connect this pcb to ax-14 amp, does this have voltage regulation
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File Type: jpg APEX%20F100PSU%20PCB pcb size 90x130.jpg (762.9 KB, 1155 views)
File Type: jpg APEXaudio Reg Amp PSU.jpg (298.7 KB, 940 views)
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Old 23rd January 2011, 12:30 PM   #608
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yup, i connected the input and output gnd to psu to gnd ground[/QUOTE]

Picture not clear, but your soldering don't look good.
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Old 23rd January 2011, 12:31 PM   #609
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Quote:
Originally Posted by viki_v2 View Post
How to connect this pcb to ax-14 amp, does this have voltage regulation
First is PSU with protect, second is regulated PSU.
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Old 23rd January 2011, 12:59 PM   #610
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Can both be used
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