900W H-class PA Amp with Limiter

[mkubawat]

hi apex
I recently completed H900 with IR2117 ,then test it & powered with 50-0-50v(use only +/- MV for test) sound is OK but drivers MJE15032 ,15033 found very hot.
Please help me for this problem

 

[DILIP KUMAR]

bias settings

dear chestap
i am a new diyer on this forum decided to make both your amps i have tested step and dc protect on your pcb both working can you tell how to bias amp and please procedure
warm regards
dilip kumar

 

[andrewlebon]

nic pcbs

HI DILIP
greetings nice work hows the result of chestap amp looking forward for result
thanking you
andrew lebon

 

[ravpreet420]

hello
Plz anybody post vertex or cheshtap pcb layout (equal 2011) in pdf ?or send file at mail address
jaddeja@gmail.com

 

[andrewlebon]

bias

hi chestap
greetings today tested amp in ab class at 70 volts congrats your
amp is working tomorrow i test in h class please can you tell biasing voltage over emitter resistances
warm regards
andrew lebon

 

[andrewlebon]

THANKS

hi Chester
greetings first of all THANK for giving diyers another H class amplifier
SUPERB SOUND QUALITY and the assistance you have provided all the way i am really grateful for schematic and great pcb design real good bass crisp highs and
POWER
1 any diyer making this amp please cut nc no connections on pcb of relay otherwise no problem amp came on first time once again thank you chester looking forward to make more amps of yours
warm regards
andrew lebon

 

[gooseneck]

to andrewlebon...hi sir...i want to diy this amp beringer and QSC...but the problem is diode 1n4934..is not avaible..in our locality...

tnx....benny

 

[ravpreet420]

Hello andrewlebon
plz post picture & pcb for all diyers
Thanx

 

[andrewlebon]

pcb

hi ravpreet
greetings there is no PCB for vertex at the moment
nobody is sure if vertex schematic is ok so why waste your time and money when you are not sure if its going to work why dont you make both h class amps on this h900 thread both amps are tested for sound quality and reliability
warm regards
andrew lebon

 

[engel dela pena]

gooseneck,
any problem using 1n4935 @ alexan

 

[gooseneck]

to Sir Engel dela pena.. yes sir...coz 1N4934 or 1N4935 is not available in Alexan...do you have plenty of this..?can you...? how much..each..?tnx benny.

 

[engel dela pena]

gooseneck,
i have alexan product list maybe you mean no stock

 

[andrewlebon]

amp

WORKS REALLY GOOD

 

[HighTec]

andrewlebon,

now you need to perform some hardcore testing m8. Attach a 100Hz sine wave signal and a proper 4 ohm dummy load. Crank the amp up near the clipping level and keep it running at least 1 hour. If the amp survives, then you can say...jolly good show!

 

[andrewlebon]

ok hitech i do it
warm regards
andrew lebon

 

[ravpreet420]

hello andrewlebon

testing result ?

 

[irvynejay]

Chestap amp succesfully build and tested

effort pays off

test only on 0/45/75 -/+vdc power is good even in low voltage

i have no regret building this amp many thank's to chestap

 

[andrewlebon]

NICE WORK

HI IRVYNEJAY
greetings nice work
warm regards
andrew lebon keep working on FIDEL

 

[gooseneck]

to sir Engel...
sir...where did you buy your BAV21...?..is it available in RAON..?


tnx...benny

 

[engel dela pena]

benny,
no luck in raon
try hunting crt monitor,many bav21,bav20