900W H-class PA Amp with Limiter

[apexaudio]

BIAS

H900 with BIAS Adjust

 

[paul_usa_22]

than's mr apex

Thank you mr apex.the h 900 sounds incredible. i made a smps for it with +/-90v and +/-50 volt that's way i ask for biasing.my idle current is too low.thank you again.

 

[apexaudio]

Thank you mr apex.the h 900 sounds incredible. i made a smps for it with +/-90v and +/-50 volt that's way i ask for biasing.my idle current is too low.thank you again.

Can you post pictures, and share smps PSU circuit?
Regards

 

[engel dela pena]

paul_usa
sharing smps is good for h900 builder,please share it

 

[engel dela pena]

apex,
please label the trimmer pots 1,2,3 in the schematic,
bourns like this best fit in pcb space,
just please help us determine w/c is 1 ,2 , 3

 

[TonyTecson]

look at the side/face of the trimpot it is there...on the scheme start from the top....1....2 is center.....3 is bottom pin...

 

[engel dela pena]

sir tony,
yes sir no problem with the trimpot clockwise wiper ccw (1,2,3)already labeled,how to apply it on ckt. is what i mean,better label the schematic with 1,2,3 for better understanding/application.

 

[engel dela pena]

the wiper must be pin 2,
1 and 3 must be cleared

 

[engel dela pena]

thank you sir tony

 

[paul_usa_22]

hy diy-ers

hy guys. the smps is not my design but i adapted for me .the smps it takes +/-50v,+/-90, +/- 24 v for protection board,and +/-12v for other accesories`i put 2x200watt bulb with h 900 and the bulb don't flicker at all .it's verry stabile.i will share the design and some pictures as soon as posible. thank's to mr apex i will build some active line array speaker just for testing but this when i have more time. bye

 

[engel dela pena]

apex,
i found bav20,hope this is fine instead bav21

 

[paul_usa_22]

engel dela pena

engel dela pena you can use BYW54,i use this too and it's ok.maybe it's easy to find in your area.

 

[engel dela pena]

looking at datasheet the only difference is bav21 is 250v while bav20 is 200,
i already use what apex post before mur120,and uf4004

 

[engel dela pena]

apex,
my h900 update
happy sharing pics ir and bav21

 

[ravslanka]

hi suryadi5417,

this is the final pcb.however iam using tripple darlington stage with same pcb.

regards

ravs

be a vegeterian.....

 

[Cristi]

A suitable power supply for this amplifier, and not only can be found here: Connexelectronic

 

[paul_usa_22]

hy

cristi,first the smps is 220$ that is too expensive......and it's more imortant to diy the smps.in fact that's way we are here

 

[crazymechanic]

Apex sorry if this question has been here more than once but how much uF would you sugest for the MV? would 30 000 uF be enough, atleast I think so...

 

[apexaudio]

Apex sorry if this question has been here more than once but how much uF would you sugest for the MV? would 30 000 uF be enough, atleast I think so...

20 000 uF is enough for MV.

 

[apexaudio]

PSU circuit for 3 step class H amps like VERTEX.