You have no enough expirience with class H amplifiers, there is ansvers in thread.
Regards
I like your B500 design, and i will try
Sir i want to ask,
where i can find NSL32? can i change with different others.
thanks
Sir i want to ask,
where i can find NSL32? can i change with different others.
thanks
NSL32 can be replaced with any opto-resistor or you can DIY it with LED + LDR.
Regards
Hi Emmi !,
Welcome to DIYaudio!🙂
It’s a two step driver circuit. In this amp we are using one more voltage (second step) apart from common +/- rail voltages. +/- MV medium voltage which would less than main rail voltage (HV-high voltage).
"Nothing comes for free... Even knowledge”😀 you have to pay the price.. So just read full thread 82 pages of discussion and have a better understanding about H class amplifier.
Every one is ready to help you on building this wonderful amplifier including Apex (He would be first person)🙄
Vijay
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Hi coolet
I'am edit track and add resistors stabilizer 10 Ohm to power out put transistor.
Regards.
Attachments
Hi, Apex.
Can you please teel me how many output transistors do I need for +/-42V?
Can I replase MJE15032/15033 with BD243/244 or similar on this voltage?
I have transformer with 2x30v~ sekundar.
Thanks
Can you please teel me how many output transistors do I need for +/-42V?
Can I replase MJE15032/15033 with BD243/244 or similar on this voltage?
I have transformer with 2x30v~ sekundar.
Thanks
Single pair will be ok, you can use BD243/BD244 or use darlingtons BDV83D/BDV84D without drivers. This schematic can help.
Regards
Attachments
gud day
sir apex what would be best replacement for MJE 15033 and MJE 15032?...coz theres no avelable here in our place ...about the .33ohms5w..can i change it to .47 or .22ohms...ang ihave 35 0 35ac transfrmr can i use it for test? than you and more power
regards
jhun
sir apex what would be best replacement for MJE 15033 and MJE 15032?...coz theres no avelable here in our place ...about the .33ohms5w..can i change it to .47 or .22ohms...ang ihave 35 0 35ac transfrmr can i use it for test? than you and more power
regards
jhun
Use 2SC4793/2SA1837, and 0,22R/5W. You can use 35 0 35 transformer for test, but zener resistors 2k2/2W replace with 1k/2W.
Regards
Have a nice day
thanks sir apex for your nice reply, your wonderful man...ok i will do, thanks again and more power GOD BLESS..
Regads
thanks sir apex for your nice reply, your wonderful man...ok i will do, thanks again and more power GOD BLESS..
Regads
You can use this amplifier also for Hi-Fi not only for PA, sound of B500 is better than most 'Hi-Fi' amps.
Regards
hello sir
pls help me for my b500 disply.pls tell me how many LEDs i can use nd also tell me for signal LED.
thanx
pls help me for my b500 disply.pls tell me how many LEDs i can use nd also tell me for signal LED.
thanx
B50 finished in Eagle5.
BD139,140 and BDW93,94 are on the same heatsink. Is it ok Apex?
Regards
BD139,140 and BDW93,94 are on the same heatsink. Is it ok Apex?
Regards
Hi boggart dapo.
I correct edit track and post the parts placement but i don't test ( Wait for holiday time ).
And you use please check and confirm for B500 schematic again.
Regard.
