MOSFET Amplifier IRFP240/IRFP9240

[andrewlebon]

Mosfet Amplifier

Hello Mile
greetings does this amplifier need zoebel output inductor

warm regards
Andrew

 

[andrewlebon]

Mosfet Amplifier

Sorry

 

[apexaudio]

Hello Mile
greetings does this amplifier need zoebel output inductor

warm regards
Andrew

No need inductor, but there is mistakes on your board...

 

[Freecrowder]

So I have been reading over this post for about 2 hours. I'm looking for boards to build the HV23 but not really finding those. Do they exist or is it possible to get gerbers and place order.

 

[andrewlebon]

Mosfet Amplifier

Thank you mile for pointing out mistake on pcb i will make prasis pcb

 

[prasi]

thats quick Andrew, . meanwhile i made another version. but the one you already made is best.
just remember to use metal film / carbon film for the zobel Resistor, as wirewounds can cause oscillation . just something i learnt recently on Mooly's mosfet amp thread.

regards
prasi

 

[andrewlebon]

Mosfet Amplifier

Thanks Prasi

 

[andrewlebon]

Prasi i like the latter version

warm regards
Andrew

 

[prasi]

thats quick Andrew, . meanwhile i made another version. but the one you already made is best.
just remember to use metal film / carbon film for the zobel Resistor, as wirewounds can cause oscillation . just something i learnt recently on Mooly's mosfet amp thread.

regards
prasi

Hi Jacques,
Here are the pdf and gerbers. These are diy designs kindly provided by APEX, so no issues in posting.

regards
prasi

 

[jacques antoine]

Hi Jacques,
Here are the pdf and gerbers. These are diy designs kindly provided by APEX, so no issues in posting.

regards
prasi

Thanks Prasi.
I just completed the 'doctoring' of your purple image with Photoshop to generate a laser-printable BW image !
Cheers,
Jacques

 

[andrewlebon]

Mosfet Amplifier

Hello
greetings and many thanks to Mile and Prasi amplifier came on first
time very detailed musical sound .
warm regards
Andrew

 

[prasi]

thats great news. congrats Andrew. nicely done.

 

[andrewlebon]

Thanks Prasi for your layout no mistakes.

 

[Vrystaat]

Looking good Andrew, Prasi is indeed very good with his layouts.
What rail voltage are you using ?

 

[andrewlebon]

Hello Vrysaat
greetings i am using +/- 30 v0lts DC
warm regards
Andrew

 

[jacques antoine]

i am using +/- 30 v0lts DC

Hi Andrew,
Congratulations for your build!
Did you change any resistor value from the schematics for running at 30V instead of 55V ?
Cheers,
Jacques

 

[Freecrowder]

So just asking again are there boards for the HV23 version with 4-5 transistors per side available. Or possibly gerbers?

 

[andrewlebon]

Apex HV23 Titan size: 325 mm x 100 mm PCB - YouTube

 

[prasi]

How about a small sub amp with mos200-ii with built in psu. simplifies wiring.

 

[andrewlebon]

Hello jacques
greetings no resistance value changed
warm regards
Andrew