500W PA amplifier with Limiter

[irvynejay]

Thanx

TL072 Pcb and Component Layout.

Ty mile now ill try to connect Step drive to my B 500
pls check if anything wrong with my work.

 

[engel dela pena]

TL072 classH Step Driver: Pcb and Component Layout.

so the -ref is i.c.pin1,2,3,
and +ref is ic,6,7,8,
the schematic must be?

 

[apexaudio]

TL072 ClassH Step Driver

TL072 classH Step Driver Schematic + PCB

 

[engel dela pena]

apex,
if the above is now correct,why pin 5,3 to bf422/423 base
it must be pin 1,7 to bf's base

 

[apexaudio]

apex,
if the above is now correct,why pin 5,3 to bf422/423 base
it must be pin 1,7 to bf's base

I made drawing mistake, go to post #923.
Regards

 

[engel dela pena]

I made drawing mistake, go to post #923.
Regards

thank you apex,
now its clear for me

 

[Mamak]

TL072 classH Step Driver Schematic + PCB

apex.for b500 amp what function at input for a and b?and can change 2sc5200 with mjl4281a?

 

[apexaudio]

B500 + TL072 Step Driver for classH.

 

[apexaudio]

apex.for b500 amp what function at input for a and b?and can change 2sc5200 with mjl4281a?

A and B use for bridge mode, MJLs can be used instead 2SA/SC

 

[apexaudio]

Ty mile now ill try to connect Step drive to my B 500
pls check if anything wrong with my work.

Use circuit from post #928, and correct pins layout for TL072 (drawing mistake)
Regards

 

[andrewlebon]

hi irvynejay
greetings you are using .1 100 volt green caps 2 .1 should be 250
volts see pcb component layout the BIGGER .1 ARE 250 VOLTS ON 120 VOLT
SUPPLY CHANGE THEM
thanking you
andrew lebon

 

[irvynejay]

tlo2

hi irvynejay
greetings you are using .1 100 volt green caps 2 .1 should be 250
volts see pcb component layout the BIGGER .1 ARE 250 VOLTS ON 120 VOLT
SUPPLY CHANGE THEM
thanking you
andrew lebon

ok ty for the advice andrew ..im still waiting for the one i ask on you andrew pls check pm if you have time

 

[engel dela pena]

2.2r

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

why you use 2.2r instead 1.5r?

 

[andrewlebon]

hi engel dela pena
greetings could not get 1.5 ohms
thanking you
andrew lebon

 

[engel dela pena]

apex,
when you said led in series with nsl32,
if no nsl32,LED as clip
did you mean like this?

 

[apexaudio]

apex,
when you said led in series with nsl32,
if no nsl32,LED as clip
did you mean like this?

Yes LED as clip, but in series with NSL32 integrated LED if you want to have clip/limit LED.

 

[sekhar]

B500 PCB WITH THICKER TRACKS

hi folks here is just a bit modified version of B500 pcb with thicker tracks . Hope u people like it . I wanted to add more o/p pairs atleast 2more pairs but i dont know the size of the current pcb . If any one can tell me the actual length of the pcb it will be very helpfull...


regards
sekhar

 

[apexaudio]

hi folks here is just a bit modified version of B500 pcb with thicker tracks . Hope u people like it . I wanted to add more o/p pairs atleast 2more pairs but i dont know the size of the current pcb . If any one can tell me the actual length of the pcb it will be very helpfull...


regards
sekhar

PCB size: 220x52,5mm
Regards

 

[sekhar]

B500 WITH SIX O/P PAIR

B500 with six o/p pair. Can any body print this pcb and tell me actual length of the pcb.... i will add silkscreen very soon only two new jumpers ......................
hope u like it guys ................

regards
sekhar

 

[sekhar]

OK guys here is the top layer showing the 2 additional needed jumpers everything else same with the earlier b500 top layer except 2 more pairs and the four 0.33E resistor ........ plz some body print the pcb on a paper and tell me the length............


regards
sekhar