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Old 19th March 2011, 09:54 AM   #1381
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Quote:
Originally Posted by QQ12e5k1 View Post
Sir,do you have B500 layout in PDF??

Regards
B500 pdf
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File Type: pdf APEX B500 Component.pdf (34.0 KB, 663 views)
File Type: pdf APEXaudio B500 PCB.pdf (19.3 KB, 602 views)
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Old 19th March 2011, 01:59 PM   #1382
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Quote:
Originally Posted by apexaudio View Post
B500 pdf

Thank you sir.

I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??

Regards
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Old 20th March 2011, 07:52 AM   #1383
viki_v2 is offline viki_v2  India
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On the protect pcb where excatly does bd241c connect.
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Old 21st March 2011, 11:43 AM   #1384
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i would like to remove the LDR, i dont need the limiter. whats the value of the resistor that i will use in place for the LDR? im planning to bridge this.
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Old 22nd March 2011, 10:06 PM   #1385
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Originally Posted by jalou1995 View Post
i would like to remove the LDR, i dont need the limiter. whats the value of the resistor that i will use in place for the LDR? im planning to bridge this.
Use 33k
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Old 23rd March 2011, 12:51 AM   #1386
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Default Bias

I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??

Regards
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Old 23rd March 2011, 05:45 AM   #1387
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Originally Posted by apexaudio View Post
Use 33k
thanks Apex
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Old 23rd March 2011, 07:21 PM   #1388
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Quote:
Originally Posted by QQ12e5k1 View Post
I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??

Regards
Set bias 25mA per outputs.
Regards
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Old 24th March 2011, 06:27 AM   #1389
mj777 is offline mj777  Philippines
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Default test voltage point?

Hello Sir Mile,

I have just finished to put components on my B500 board, right now I'm working with the protection circuit. i just want to ask about the key areas in the B500 schematic where I can test the voltage and the correct values that should be there?

I'm using a 10 Amperes, +/-50 volts AC and and in DC it's measuring on the multimeter around +/- 68 to 69 volts.

I'm using in R24 and R25: 2k2 2watts

Thank you in advance for the help that u can give.

regards,
mj777
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Old 24th March 2011, 10:15 AM   #1390
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Originally Posted by apexaudio View Post
Use triple darlington topology and 8 pairs of outputs.
apex,
what would be the ideal bias for this 8 pair per output
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