I've almost got this amp built but have a question. What would happen if I replaced the 470nF cap at pin 12 of the TL074 with a 330nF cap? I just don't have a 470nF in my parts bin anywhere. Just wondering. Thanks.
Hi guys !!!
This is my first post to the forum and i have a question.
I am trying to print the pcb bord that Norazmi post for this amp,what are the dimensions of one pcb?
Output mosfets : IRF9240 and IRF240
+-48v supply
I have problem with no load temp
power dissipation in inductor = 5W and very hot
and power dissipation in all of ohter part=4W
i use 40uh Thyroid inductor
is it normal?
Hi can i make a silly question ? the voltage across 12v zener diodes should be around 12v because I think my supplier gave me wrong zeners.I have about 5v.
Hi guys!
I have a power supply of +/-40V and MOSFET transistor pair irfp240/irfp9240,
what do I need to change the schematic?
If the schema can be a little bigger? (see#1)!!
thank you!
i had the same problem and i was very confused because my earlier versions of this amp worked perfectly . but when i used irf 9640 it failed even three hours after working properly. when i changed to irf540n and irf9540n everything is o.k up to now even when using 4ohms at +/-50vlts
this circuit is one of the few reliable circuits i know of pls try harder and i am working on the o.c protection part and also a way of making this amp use hi power like fredos version which uses +/-90vlts and supports 2 ohms . and outputs are only irfp240 and irfp9240 . also is discreet like this amp meaning it does not use ir2xxx driver ic.
hi to all, i made a new pcb board for stereo amplifier.
the pcb is similar to the first tipe posted by norazmi, but i have changed some little things for a better diy realization:
pad is larger and 2k2 resistor is in the original size, heatsink is more simple to assemble, then i have added the inductor on pcb reduced the jumper under the board.
it's only 10x11 cm
ola galera montei esse amplificador mais quando eu ligo ele fica dando dc na saída já montei tries placa nenhuma fusiono vc sabe onde eu poço ta errando obrigador