MOSFET Amplifier IRFP240/IRFP9240

[wattaniya]

thanks apex sir and alex mm for the reply.

 

[wattaniya]

hi apex sir,
i think the in4148 wrong direction. am i correct sir.

 

[apexaudio]

hi apex sir,
i think the in4148 wrong direction. am i correct sir.

Yes, 1N4148 wrong direction.

 

[wattaniya]

hi apex sir.
i think this image is hv25 and working pcb, am i right sir.
only change is 10k instead 6.8k/1w resistor.

 

[apexaudio]

hi apex sir.
i think this image is hv25 and working pcb, am i right sir.
only change is 10k instead 6.8k/1w resistor.

This amp is similar as HV25, but work in class H, there is step driver with IRF3205 and IRF4905 add in rail like in H200 http://www.diyaudio.com/forums/solid-state/162081-dc-servo-mosfet-amplifier-8.html

 

[wattaniya]

thanks for the reply sir.

 

[Thabto]

Hi Apexaudio,
Is HV25 the final design of this MOSFET Amplifier IRFP240/IRFP9240? If so, in which post can I find the PCB layout & schematics. Going through all these pages makes me go insane. I need to build this amp. Need your help. Thanks.

 

[apexaudio]

Hi Apexaudio,
Is HV25 the final design of this MOSFET Amplifier IRFP240/IRFP9240? If so, in which post can I find the PCB layout & schematics. Going through all these pages makes me go insane. I need to build this amp. Need your help. Thanks.

I share HV23 and that is final design, there is no HV25.
Regards

 

[Thabto]

If the hv23 is the final, in which post can i find the accurate pcb schematics?

 

[apexaudio]

HV23

If the hv23 is the final, in which post can i find the accurate pcb schematics?

 

[masood]

dear alex mm,
can send you send me the pcb ,and parts list of this hv25 amplifierat my e-mail khan.shahid251@gmail.com
thanking you masood

 

[wattaniya]

hi apex sir,
hv23 5 pair output in progress.

 

[apexaudio]

hi apex sir,
hv23 5 pair output in progress.

Nice work, you need PSU and protect also.

 

[wattaniya]

Nice work, you need PSU and protect also.

thank u sir.

 

[apexaudio]

Simple Soft-start, DC, Thermal and Overload Protect with NE555. Use single 12vac for suply.

 

[wattaniya]

thank u sir.

 

[apexaudio]

This circuit suply 12V DC Fan activated by signal present on amp out, very simple without NTC on heatsink.

 

[wattaniya]

hi apex sir,
i supply power to hv23 5 pair.
supply voltage 46v,0,46 dc.
dc offsett showing 30v dc, what will be the problem?
i measured the 15v zd, showing 6.5dcv.
i adjust the preset to 2v from 10ohm 10watt from the power rails.

 

[apexaudio]

hi apex sir,
i supply power to hv23 5 pair.
supply voltage 46v,0,46 dc.
dc offsett showing 30v dc, what will be the problem?
i measured the 15v zd, showing 6.5dcv.
i adjust the preset to 2v from 10ohm 10watt from the power rails.

Connect input gnd to psu gnd, I must use this for my signature

 

[wattaniya]

thanks sir,
I must use this for my signature, what is this mean?