500W PA amplifier with Limiter

[Rns audio box]

Use this circuit with correct +/-15V polarity,
Regards

ok, i will try this circuit. thanks
http://www.diyaudio.com/forums/attachment.php?attachmentid=205733&stc=1&d=1295193100

 

[apexaudio]

ok, i will try this circuit. thanks
http://www.diyaudio.com/forums/attachment.php?attachmentid=205733&stc=1&d=1295193100

Use circuit from post #1200, circuit in your attachment have wrong +/-15V polarity,
Regards

 

[Rns audio box]

Use circuit from post #1200, circuit in your attachment have wrong +/-15V polarity,
Regards

ok sir copy.. thanks

 

[gooseneck]

Sir Apex
Greetings of peace and joy...
i just want ask help from you...coz i have a transformer with secondary of 70V-0-70V and it will give something about 98V to 100V rail...so the questin is can i used this power supply in B500? and please post if there is any revision in B500...thanks.

 

[Na2nK]

Mr.Mile
Can i use 2SC4793 n 2SA1837 for substitute MJE 15032 n MJE 15033 to drive 4 pair 2SC5200 n 2SA1943?
Thanks

 

[apexaudio]

Mr.Mile
Can i use 2SC4793 n 2SA1837 for substitute MJE 15032 n MJE 15033 to drive 4 pair 2SC5200 n 2SA1943?
Thanks

Yes 2SC4793/2SA1837 will be OK, PHONIC XP3000 use it for drive 6 pairs.

 

[apexaudio]

Sir Apex
Greetings of peace and joy...
i just want ask help from you...coz i have a transformer with secondary of 70V-0-70V and it will give something about 98V to 100V rail...so the questin is can i used this power supply in B500? and please post if there is any revision in B500...thanks.

You must add more outputs for +/-98V.

 

[wattaniya]

i cant find 16a relay for protection. can i use 5a relay for sp protection?

 

[AndrewT]

You must add more outputs for +/-98V.

The DC SOA of a cold 5200 is ~400mA @ 98Vce
This must be reduced for operation at elevated voltages.
Expect DC SOA to be between 200mA and 300mA at quite warm to hot temperatures.

Short term SOA can be much higher, but care must be taken to ensure the high current pulses do not have high duration. eg.at Tc=70degC and single current pulse of 1.8Apk, the duration must be less than or equal to 10ms.

 

[Na2nK]

Yes 2SC4793/2SA1837 will be OK, PHONIC XP3000 use it for drive 6 pairs.

ok sir thanks, i'll use it for my B500

 

[electra_ina]

Mr. Apex..I try B500 with predriver 2SA1668a/sc4832a with Re 680 (instead 1K) and driver MJE15032/33 and 5 pair 2SA2151B/SC6011B...result very wonderfull, but I don't knows for a long time with this configuration..What is matching with your design B500?
Thanks before..Pozdrav..

 

[apexaudio]

Mr. Apex..I try B500 with predriver 2SA1668a/sc4832a with Re 680 (instead 1K) and driver MJE15032/33 and 5 pair 2SA2151B/SC6011B...result very wonderfull, but I don't knows for a long time with this configuration..What is matching with your design B500?
Thanks before..Pozdrav..

What is rail voltage? Can you post pictures with heatsink for your B500?
Regards

 

[wattaniya]

zener diode zy15v means 15v regulator zener diode. zf12 means 12v zener am i correct?

 

[apexaudio]

zener diode zy15v means 15v regulator zener diode. zf12 means 12v zener am i correct?

ZY15 is 15V/1,3W,and ZF12 is 12V/400mW zener diodes.

 

[wattaniya]

what is the different of zf15 and zy15?

 

[apexaudio]

what is the different of zf15 and zy15?

ZF/ZY - 400mW/1,3W

 

[wattaniya]

mr apex sir do u have b500 pcb layout in pdf format.

 

[apexaudio]

mr apex sir do u have b500 pcb layout in pdf format.

APEX B500 PCB.pdf

 

[wattaniya]

for b500 positive all in one pcb layout.
soft start,psu protection,b500.

 

[electra_ina]

What is rail voltage? Can you post pictures with heatsink for your B500?
Regards

Sorry Apex..picture this B500 will post next time after I take foto this PA...
I used 2 pcs trafo 8A with 0-57vac and result 57vac-0-57vac..and elektrolit capasitor Philips 2 x 17.000uf/100v..
Specification predriver 2SA1668a/sc4832a (25 watt) is higher than 2sa 1837/sc4793 (20 watt)..Is correct?
Pozdrav..😉😉