500W PA amplifier with Limiter

[irvynejay]

i hope mile will confirm this before ill put the step drive in to my b500 thanx for the info
engel dela pena

 

[engel dela pena]

andrewlebon,
but i think it's not right to feed pos.12v to pin 4,
and neg.12v to pin 8

 

[engel dela pena]

andrewlebon,
can you please post picture of working tlo step?
with dmm ac reading exeeding the first step supply
please,
i want to upgrade my b500,
i like class how it handle heat

 

[Tekko]

ur mixing up the pins, its mounted with pin 1 facing the connector.

 

[andrewlebon]

hi engel dela pena
greetings will post picture in 3 hrs as shops have not opened
need to buy camera batteries sorry for not posting pictures earlier busy exam
time here
thanking you
andrewlebon

 

[engel dela pena]

ur mixing up the pins, its mounted with pin 1 facing the connector.

tekko,
evaluate the schematic if you follow the posted supply how can output pin1 go to bf422?

 

[engel dela pena]

tekko,

 

[engel dela pena]

my TLO step,
and torroid 82-41-0-41-82, 18-0-18 ac

 

[andrewlebon]

hi engel dela pena
greetings mytlo 72 step driver
thanking you
andrew lebon

 

[irvynejay]

tl02

hi engel dela pena
greetings mytlo 72 step driver
thanking you
andrew lebon

andrew have you test it did it work?
Please check pm ty

 

[engel dela pena]

hi engel dela pena
greetings mytlo 72 step driver
thanking you
andrew lebon

please show i.c. pin clearer
please clarify tlo72 pin supply.
thanks

 

[andrewlebon]

hi engel dela pena
greetings yes its tested working on real 1000 watt speakers
1 tlo 72 step driver ic gets supply from 15 volt zeners on b500 pcb
2 i use IRF2807 MOSFETS GET WARM MY HEAT SINK IS THICK SO make heat
sink thicker
3 check amp with tlo72 step regulator with 100 WATT BULB IN SERIES
thanking you
andrew lebon

 

[Mamak]

b500

thanks guys
the amp is working well
two days of testing no overheating
very good sounding amp

what transformer u use?its hard to find -+90v.what speaker u use?

 

[engel dela pena]

what transformer u use?its hard to find -+90v.what speaker u use?

mamak,
b500 supply is 40-0-40ac
torroid,
i bought it from a surplus shop w/o coil,
and recoil it,
only using locally made speaker,but sound is clear amp is clean,many builder already testify

 

[engel dela pena]

tlo

hi engel dela pena
greetings yes its tested working on real 1000 watt speakers
1 tlo 72 step driver ic gets supply from 15 volt zeners on b500 pcb
2 i use IRF2807 MOSFETS GET WARM MY HEAT SINK IS THICK SO make heat
sink thicker
3 check amp with tlo72 step regulator with 100 WATT BULB IN SERIES
thanking you
andrew lebon

andrewlebon
one last thing mate.
w/c of this two is your pin 1?

 

[Mamak]

mamak,
b500 supply is 40-0-40ac
torroid,
i bought it from a surplus shop w/o coil,
and recoil it,
only using locally made speaker,but sound is clear amp is clean,many builder already testify

i want to try build this amp and want drive pioneer car subwoofer.this amp enough to drive about 400watt amps?and my problem is build car smps.u have any circuit high power smps?

 

[engel dela pena]

mamak,
try this site
diysmps

 

[andrewlebon]

hi engel dela pena
greetings well -15 VOLTS NEGATIVE GOES TO PIN NO
1 PIN NO 8 GETS 15 VOLTS POSITIVE once u use step driver u really feel the power

thanking you
andrew lebon

 

[engel dela pena]

hi engel dela pena
greetings well -15 VOLTS NEGATIVE GOES TO PIN NO
1 PIN NO 8 GETS 15 VOLTS POSITIVE once u use step driver u really feel the power

thanking you
andrew lebon

thank you mate,
kindly attach here your answer to my previous post 915

 

[apexaudio]

TL072 Step

TL072 classH Step Driver: Pcb and Component Layout.