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DC Servo MOSFET Amplifier
DC Servo MOSFET Amplifier
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Old 2nd March 2012, 08:22 AM   #281
132222 is offline 132222
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Excuse me.
Why is the output MOSFET gate is 2.5 volts DC power.??
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Old 2nd March 2012, 09:40 AM   #282
carlmart is offline carlmart  Brazil
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Quote:
Originally Posted by apexaudio View Post
I use TL071 instead pot for auto adjust DC offset, with C6 offset is +/-0.1mV and without C6 it's +/-1mV.
So C6 could be eliminated then.

IMHO, the whole reason for using a DC servo is to avoid a capacitor in the signal path and improve audio quality, isn't that so?
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Old 2nd March 2012, 10:59 AM   #283
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by carlmart View Post
So C6 could be eliminated then.

IMHO, the whole reason for using a DC servo is to avoid a capacitor in the signal path and improve audio quality, isn't that so?
Auto offset adjust is adventage, no need to set with pot and measure...
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Old 18th March 2012, 10:24 AM   #284
nix is offline nix  Philippines
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Originally Posted by apexaudio View Post
Amplifier for 1R load
Hi sir apex do you have pcb on this design because i want to try build this amp..

Thank you.

regards,
nix
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Old 21st March 2012, 05:26 PM   #285
apexaudio is offline apexaudio  Serbia
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Originally Posted by nix View Post
Hi sir apex do you have pcb on this design because i want to try build this amp..

Thank you.

regards,
nix
No, use basic pcb for drive and another pcb on heatsink for outputs.
Regards
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Last edited by apexaudio; 21st March 2012 at 05:32 PM.
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Old 21st March 2012, 05:35 PM   #286
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by 132222 View Post
Excuse me.
Why is the output MOSFET gate is 2.5 volts DC power.??
Amp work in class B, with AB setup gate is on about 3,5 volts DC.
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Old 25th March 2012, 07:27 AM   #287
wattaniya is offline wattaniya
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Originally Posted by apexaudio View Post
High efficiency (classH), high power (200W/8R peak) on small pcb this amp will be great for active speakers...
HI APEX SIR,
can u, share this pcb layout of this amp.
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Old 25th March 2012, 04:52 PM   #288
apexaudio is offline apexaudio  Serbia
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Originally Posted by nazirdigi View Post
HI APEX SIR,
can u, share this pcb layout of this amp.
Pcb from post #53 ?
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Old 25th March 2012, 06:44 PM   #289
wattaniya is offline wattaniya
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HI APEX SIR,
u shared h100,h150,h200,h210 schematics, can u share any one of these schematic with all component values,

pls check this pcb for errors and mark the component value.
thank u.
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Old 26th March 2012, 05:16 PM   #290
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by nazirdigi View Post
HI APEX SIR,
u shared h100,h150,h200,h210 schematics, can u share any one of these schematic with all component values,

pls check this pcb for errors and mark the component value.
thank u.
This pcb is for MPSA42/92 instead BF420/421...
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