150W MOSFET Amplifier with IRFP250x2

[apexaudio]

NE555 Protect...

 

[nigelwright7557]

I have class ab mosfet amps that run off 10mA bias current.
You only need enough current to kill cross over distortion. Any more is wasted as heat.
Peavey are known for low bias amps too.

 

[stewin]

Hi M. Mile, the first skecht APEXN20

hi sir Miles

can 1n4148 be used in n20 instead of bav21?

 

[apexaudio]

hi sir Miles

can 1n4148 be used in n20 instead of bav21?

No, use UF4004...

 

[stewin]

ok sir Miles , i hope n20 is more clearer, and has better sound quality ,and more clarity in signal to noise ratio than the ax14 ,nx14,fh11 or the fx8

 

[desertstorm]

Yes

Thank you so much Sir Mile and what is the supply voltage of NX400 Sir?

 

[andrewlebon]

IRFP250 MOSFET AMPLIFIER

IRFP250 amplifier in vogue

 

[kandimba]

Hi M. Mile here they are, with UF4004

 

[desertstorm]

NE555 Protect...

Good day Sir Mile may i know what is the supply voltage of Nx400 sir thank you so much sir

 

[stewin]

nx 400 uses +/-80vlts

IRFP250 amplifier in vogue

nice andrew , neat and compact . great job sir.

 

[desertstorm]

Thanks so much sir

 

[kandimba]

Hi Mr. Mile, can I run NX300 with +75VDC-0-75VDC at 4R. About the pro detect, should I use 555 protection?

Thanks in advance

Pozdrav

 

[nigelwright7557]

OK, thats quite low for a FET. Lateral FETS usually need 150mA and Vertical FETS are run at 400mA. If you look at the transfer characteristics in fig 3 on the link: International Rectifier irfp250 datasheet pdf

You can see if you ran it at 400mA there is chance of thermal runaway.

I am running my irfp240/9240 amps with 10mA bias current and they sound fine. 10mA is just enough to kill crossover distortion.

 

[apexaudio]

Hi Mr. Mile, can I run NX300 with +75VDC-0-75VDC at 4R. About the pro detect, should I use 555 protection?

Thanks in advance

Pozdrav

Use PRO detect from N20.

 

[kandimba]

Ok Mr. Mile, thanks for your the reply about protection. But again, can I run this amplifier with +75VDC -75VDC at 4R.

Pozdrav

 

[apexaudio]

Ok Mr. Mile, thanks for your the reply about protection. But again, can I run this amplifier with +75VDC -75VDC at 4R.

Pozdrav

Yes,
Pozdrav

 

[kandimba]

Hi Mr. Mile when you talk about N20 detect, do you mean this.

Pozdrav

 

[apexaudio]

Hi Mr. Mile when you talk about N20 detect, do you mean this.

Pozdrav

Yes

 

[kandimba]

Thanks for your quik reply.

Pozdrav

 

[macd]

What Protect to use with NX300

Good day Sir Mile,

What protection circuit can we use with NX300? If I understand correctly, N20 works with 555 protect?

Regards,
MACD