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Old 17th December 2012, 03:30 AM   #171
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Default classd

Hi Apexaudio
greetings interested in making your amp will FDA series mosfets
be ok to use in this amp
warm regards
andrew lebon
Attached Files
File Type: pdf APEX_D200_TO247_PCB.pdf (191.8 KB, 690 views)
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Old 17th December 2012, 06:22 AM   #172
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Quote:
Originally Posted by IRSound View Post
Thanks Mile ,

i attached three photos about Crown XLS1500

the rail voltage of this amp is about +/- 75v same as D200 , also this amp use a pair of TO-220 in output stage , but crown claim that this amp can handle 300w @ 8 Ohm / 525w @ 4 Ohm / 775w @ 2Ohm

how it's possible ?

Regards ,
IRSound
Crown XLS1500 use regulated SMPS in PSU, with SMPS D200 have same power as Crown.
Regards
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Old 17th December 2012, 06:23 AM   #173
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thanks
the tone control have noise
i must creat preamp with LPF with 1.5 V in exit that
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Old 17th December 2012, 06:43 AM   #174
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Quote:
Originally Posted by Hadighorbani View Post
thanks
the tone control have noise
i must creat preamp with LPF with 1.5 V in exit that
Use XL2 active subwoofer x-over.
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Old 17th December 2012, 06:46 AM   #175
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Quote:
Originally Posted by andrewlebon View Post
Hi Apexaudio
greetings interested in making your amp will FDA series mosfets
be ok to use in this amp
warm regards
andrew lebon
450kHz is to high for FDA, use IRFB31N20D... or change frequency to 250kHz.
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Old 17th December 2012, 07:08 AM   #176
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xl2 have in output 1.5 v sir?
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Old 17th December 2012, 07:17 AM   #177
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can i use irfp 250 ?
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Old 17th December 2012, 07:34 AM   #178
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Quote:
Originally Posted by Hadighorbani View Post
can i use irfp 250 ?
XL2 have 1.5V output and IRFP250 can't be use on 450kHz.
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Old 17th December 2012, 07:43 AM   #179
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sir manoj say test irfp250.
this mosfet can work in 1mHZ he thing.
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Old 17th December 2012, 07:47 AM   #180
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Quote:
Originally Posted by Hadighorbani View Post
sir manoj say test irfp250.
this mosfet can work in 1mHZ he thing.
Yes but with high switching loses and IRFP250 will heat.
Use volume pot value 1-5k for test.

Last edited by apexaudio; 17th December 2012 at 08:04 AM.
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