500W PA amplifier with Limiter

[klevismuka]

apex b500 stereo Sprint Layout file

there is .lay file (open in Sprint Layout)

(i didn't know that file should be a zip file)

 

[rohin]

correct

please share .lay file.

 

[saminnografix]

B500

greetings...
may i ask for Mono-Stereo-Parallel circuit option for 2 channel B500

thank you
regards

 

[pallab]

Apex NE555 stereo protection.

Protection for b500.

 

[sudhir kumar]

Does any body have gerber files for apex b500 tef ? please post a link or send me. Thanks in advance.

 

[klevismuka]

Hi,

Can i use mjw21195 and mjw21196 instead of 2sc5200 and 2sa1943 in apex b500?

 

[pallab]

i have used mjl3281/1302 pair(5pair) insted of 2sc5200.dc voltage is +-82v ..nice clean sound super bass..

 

[thimios]

i have used mjl3281/1302 pair(5pair) insted of 2sc5200.dc voltage is +-82v ..nice clean sound super bass..

What schematic and what pcb?

 

[pallab]

What schematic and what pcb?

i have built my Own pcb . schematic is b500 standard virsion all components same as schematic just change outputs... for more reliable in bass note i used mjl pair.cheak my dual 15 inch top result is awesome....crystal clear audio.Thanks mr.mile..

 

[pallab]

Hi,Mr mile...I have 2 questions 1)can b500 handle 60 0 60 v ac with 4 ohms load with 5 pair mjl3281/mjl1302.??
2)is their any replacements of driver or other components for this voltage??

 

[rohin]

Hi,Mr mile...I have 2 questions 1)can b500 handle 60 0 60 v ac with 4 ohms load with 5 pair mjl3281/mjl1302.??
2)is their any replacements of driver or other components for this voltage??

hi , what is price of mjl ? and where to get in india ? i test with +-90 v dc b500 works good but heat more coming.

 

[pallab]

hi , what is price of mjl ? and where to get in india ? i test with +-90 v dc b500 works good but heat more coming.

I bought them from mouser.in online store @RS--500/ pair.i also test with +-82v dc 2channel with 2nos dual 15inch top (500w rms each speaker)with full volume in whole day...With big heatsink and 4inch cooling fan..Result is aswame...Mainly bass note it's punchy.

 

[sajti]

Hi,Mr mile...I have 2 questions 1)can b500 handle 60 0 60 v ac with 4 ohms load with 5 pair mjl3281/mjl1302.??
2)is their any replacements of driver or other components for this voltage??

Crest Audio used 7 pair 2SC5200/2SA1943 with +/-85V in FA1201/2401. The driver was one more pair 2SC5200/2SA1943. Triple darlington would better to use for such high power amplifier.

Sajti

 

[pallab]

Crest Audio used 7 pair 2SC5200/2SA1943 with +/-85V in FA1201/2401. The driver was one more pair 2SC5200/2SA1943. Triple darlington would better to use for such high power amplifier.

Sajti

Thanks for answering sir.
7 pair 2SC5200/2SA1943 at 85v = 1A×7=7ampere.(2sc5200 at 85 v SOA 1A for music) But 5 pair mjl3281/1302 at 85=2A×5=10ampere.
So,i think 5 pair mjls are more powerful then 7 pair Toshiba ..Is it correct sir??
Can I replace my driver mje15032/33 to 2sc5200/1943 without charging anything??

 

[sajti]

Can I replace my driver mje15032/33 to 2sc5200/1943 without charging anything??

I don't think that it's necessary, if Your amplifier working well.

Sajti

 

[AndrewT]

Thanks for answering sir.
7 pair 2SC5200/2SA1943 at 85v = 1A×7=7ampere.(2sc5200 at 85 v SOA 1A for music) But 5 pair mjl3281/1302 at 85=2A×5=10ampere.
So,i think 5 pair mjls are more powerful then 7 pair Toshiba ..Is it correct sir??
Can I replace my driver mje15032/33 to 2sc5200/1943 without charging anything??

the Toshiba 1943/5200 are rated @ 150W @ 25degrees C at up to ~44Vce, the ONsemi 3281/1302 are rated @ 200W @ 25degrees C at up to 4A @ 45Vce
To see this more clearly you really need to use a plot of temperature de-rated SOAR vs load power and the Toshiba shows much lower capability. This becomes especially significant at the higher voltages, above 55Vce

I use a very simple guide for determining the maximum reliable power output:
Pout = total output device Pmax / De-rating Factor.
For mosFETs DF = ~4, For BJTs DF 5 to 6,
ONsemi work with DF=5 and Toshiba work with DF=6

 

[pallab]

the Toshiba 1943/5200 are rated @ 150W @ 25degrees C at up to ~44Vce, the ONsemi 3281/1302 are rated @ 200W @ 25degrees C at up to 4A @ 45Vce
To see this more clearly you really need to use a plot of temperature de-rated SOAR vs load power and the Toshiba shows much lower capability. This becomes especially significant at the higher voltages, above 55Vce

I use a very simple guide for determining the maximum reliable power output:
Pout = total output device Pmax / De-rating Factor.
For mosFETs DF = ~4, For BJTs DF 5 to 6,
ONsemi work with DF=5 and Toshiba work with DF=6

5 pair mjls =10*200=2000
Now 2000/5=400watts.
4pair Toshiba=8*150=1200
Now 1200/6=200watts.

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[AndrewT]

5 pair mjls =10*200=2000
Now 2000/5=400watts.
4pair Toshiba=8*150=1200
Now 1200/6=200watts.

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that shows that 8pair of Toshiba roughly match 5pair of Onsemi.
In your previous post you compared 7pr to 5pr

7 pair 2SC5200/2SA1943 at 85v = 1A×7=7ampere.(2sc5200 at 85 v SOA 1A for music) But 5 pair mjl3281/1302 at 85=2A×5=10ampere.

Have you tried comparing current capability @ 100ms & 60Vce?
Worth having a good look at the two datasheets for the higher Vce SOA limits.

 

[pallab]

Rough work...

 

[saminnografix]

5 pair mjls =10*200=2000
Now 2000/5=400watts.
4pair Toshiba=8*150=1200
Now 1200/6=200watts.

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Good Day Sir,
At what load are you referring to?
4R or 8R
can Amplifier classes has something to do with the power output?
especially when used to class H with 2 or 3 steps of voltages

thanks
regards