MOSFET Amplifier IRFP240/IRFP9240

[apexaudio]

Originally Posted by dudaindc

Hello Mile
Do you mind posting the schematics for the OP based version?
Thanks!

HV250 schematic

[apexaudio]

HV250 is much older than HV350, discounted for long time but still worked.

[Krisfr]

Originally Posted by udhay_cit

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

Do you have a schematic of this? Thanks

[apexaudio]

Thread start with this schematic.

[apexaudio]

Amp from schematics with 5 pairs mosfets.

[khalsa]

hi apex send the pcd drawing 5pair mosfets

[apexaudio]

Originally Posted by khalsa

hi apex send the pcd drawing 5pair mosfets

Use this if you want, but I not suggest to use IRFP240/IRFP9240 for that power and rail voltage it's not realable.
Regards

[khalsa]

hi apex thanks for suggestion

[Tube Pro]

Originally Posted by apexaudio

Use this if you want, but I not suggest to use IRFP240/IRFP9240 for that power and rail voltage it's not realable.
Regards

Hi Mile,

why did yo say you don't suggest those IRFs for that rail voltage? Is that too high?
How about if we use +/- 67vdc? (or 45-0-45 secondary transformer)

Regards.

[apexaudio]

Originally Posted by Tube Pro

Hi Mile,

why did yo say you don't suggest those IRFs for that rail voltage? Is that too high?
How about if we use +/- 67vdc? (or 45-0-45 secondary transformer)

Regards.

For safety reason +/-80vdc is maximum suggested voltage, and U can use 4 or 5 pairs outputs.
With +/-67vdc ,and 4 pairs outputs U will have very realable amp.
Regards