900W H-class PA Amp with Limiter

[A square]

hello sir

how can get more power from h900 .??????

what changes have to make ...

thanx....

 

[kASD]

hello sir

how can get more power from h900 .??????

what changes have to make ...

thanx....

Increase the rail voltage and add more devices at output stage is logical approach in simple manner.

 

[A square]

hello sir

pls tell me how many rail voltage can i increase,

nd how many pairs i can add.

thanx....

 

[kASD]

How much power do you want ?

With 2 step class-h with 1943/5200 pairs you cant increase your rails beyond 70VDC per step. Around 3.5kW could be manageable with 14-16 pairs at output for continuous duty cycle operation into 2 ohms.

 

[engel dela pena]

workhorse,
140-70-0-70-140dc
14-16 pairs
around 3.5kw
is this possible using TLO step driver with b500?

 

[A square]

hi

How much power do you want ?

With 2 step class-h with 1943/5200 pairs you cant increase your rails beyond 70VDC per step. Around 3.5kW could be manageable with 14-16 pairs at output for continuous duty cycle operation into 2 ohms.

hello sir

how much power i can get on 2ohm lord vd h900 .??????

thanx sir.....

 

[kASD]

workhorse,
140-70-0-70-140dc
14-16 pairs
around 3.5kw
is this possible using TLO step driver with b500?

You need to use other types of drivers which are fast.

 

[kASD]

hello sir

how much power i can get on 2ohm lord vd h900 .??????

thanx sir.....

I have already answered you

 

[boggart dapo]

IR2117

@ sir mile
sir whats the diff between IR2117 and IR2117PBF are they the same ,,,,

 

[engel dela pena]

You need to use other types of drivers which are fast.

workhorse,
if i use mje15034/35
instead of mje15032/33
will it improve?

 

[engel dela pena]

workhose did you mean the gate driver?

 

[andrewlebon]

hi apexaudio
greetings can UF4OO4 ULTRA FAST be used instead of HER 154 DIODES also have BYW 80 can it be used.Every thing is completed pcb only
diodes have to be put
1 CAN it be tested with 70 0 70 dc voltage rails in class AB MODE

thankng you
andrew lebon

 

[engel dela pena]

and any replacement for bav21 ?????

apex,
IN4937 1a 600v fast recovery diode
can this replace bav21?

 

[kASD]

workhorse,
if i use mje15034/35
instead of mje15032/33
will it improve?

Both are same except voltage difference.

 

[kASD]

workhose did you mean the gate driver?

Yes

 

[angeltech]

Engel

How's your H900 going? Have you able to acquire IR2117?

 

[angeltech]

Sir Apex,

Never heard from you for a while now, BTW I been following the thread from the start and was amazed by your generousness, giving this great project for DIY people here.

Hoping for more people like....

Good luck! and more power!

 

[angeltech]

Hello everyone,

I been following the tread for a while, and was amazed by the generousness of Sir Apex.

thank you for sharing!!!

More power!!!

 

[engel dela pena]

Recovery time of 1N4937 is 200ns, and BAV21 have 50ns, MUR120 have 50ns and you can find lots of similar fast recovery diode.
Regards

apex,
sorry i repeat the question

 

[apexaudio]

hi apexaudio
greetings can UF4OO4 ULTRA FAST be used instead of HER 154 DIODES also have BYW 80 can it be used.Every thing is completed pcb only
diodes have to be put
1 CAN it be tested with 70 0 70 dc voltage rails in class AB MODE

thankng you
andrew lebon

You can use this diodes and test with +/-70V DC in class AB, sound will be same only increase rail voltage and class H will increase power and eficiency.
Regards