MOSFET Amplifier IRFP240/IRFP9240

[Federmann]

470Ω is very much!

 

[wattaniya]

hi apex sir

can u share the hv25 (5 pair out) pcb layout top and bottom in pdf .

 

[apexaudio]

hi apex sir

can u share the hv25 (5 pair out) pcb layout top and bottom in pdf .

I can't find this files, I suggest HV23 with +/-75V rail and 4 pairs of IRFPs is OK.

 

[jalou1995]

Do i have to match the mosfets? I know theres a lot of discussions on this matter... and yes I googled it. some people would say its a must some people say otherwise. but i want the opinion of apexaudio. Whats your take on this Mile?

cheers

 

[apexaudio]

Do i have to match the mosfets? I know theres a lot of discussions on this matter... and yes I googled it. some people would say its a must some people say otherwise. but i want the opinion of apexaudio. Whats your take on this Mile?

cheers

It's better to match the mosfets, but amp will work with unmatched mosfets also.
Regards

 

[korabetsni]

hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
thank you

 

[korabetsni]

hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
And a last question: what is the difference between HV23 and HV350. I know that the HV350 has different bias circuit but why did you redesign this? the HV350 is better in something?

 

[apexaudio]

hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
thank you

State of PRO out is +HV if overload protect is active...
Regards

 

[Djera]

how much power is this amp with power supply AC 55 0 55 600watt?

Thanks!

 

[AndrewT]

600W into 8r0 requires an output voltage of 98Vpk.
Add on an allowance for losses through the amplifier, say 15V. You need supply rails of ~+-113Vdc and a mighty strong and expensive PSU to hit a 600W target.

 

[apexaudio]

600W into 8r0 requires an output voltage of 98Vpk.
Add on an allowance for losses through the amplifier, say 15V. You need supply rails of ~+-113Vdc and a mighty strong and expensive PSU to hit a 600W target.

I understand that 'Djera' have 600W transformer, and with 2x55v ac 200W/8R is exspected output power of amplifier.

 

[Djera]

transformer feeds two channels, or two of these amps.
does that mean that the amplifier is 2 x 100w/8R?

Thanks!

 

[radio]

Hi, anybody interested in my PCB work for HV350.2 without the Toshiba transistors. I replaced all the 2SA/2SC series Toshiba transistors with available 2N series. I cont find the Toshiba transistors in my city so i cont comment the performance difference b/w the original apex design and my design.

Just now i finished the design work so i didn't tested that.......

I will post my pictures after the testing now find the attachment ......

Thanks Mile

Regards
Udhay

Show me the drawing for this Audio Amplifier!
Thank you 😉

 

[apexaudio]

transformer feeds two channels, or two of these amps.
does that mean that the amplifier is 2 x 100w/8R?

Thanks!

Amplifier is 2x200W/8R with single 600W transformer.
Regards

 

[AndrewT]

Amplifier is 2x200W/8R with single 600W transformer.
Regards

200W+200W into 8r0+8r0 from a 600VA 55-0-55Vac transformer.

 

[Djera]

thanks!

 

[apexaudio]

HV23+PSU7

 

[stoN_Cold]

how much power is this amp with power supply AC 55 0 55 600watt?

Thanks!

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Regards zeoN_Rider

 

[Federmann]

My the present menu

 

[apexaudio]

Fan Control with NTC on heatsink...