900W H-class PA Amp with Limiter

TD1800

Every amplifier needs protection;);););)
 

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Greetings Mr.Nmos,
As one can see from the photos I have posted I used Stacked blue cores and 28 turns to obtain 100uh.

I never build this amp, but I know DIY user come aleady in trouble with H900


100uh are wrong, schematic show 10uh

I think you mean 10uh...?

chck schematic carefully


1. why do you have 2 core for each rail ?

2. I have never seen construction details for this amp from designer

Are you sure you have correct core ?

I think you cant use any available blue core

What is switching frequency ?

From Class D exeprience I know, when I using wrong core,... amp not work or not work stable, you will get trouble.

and in your ciruit is a class D amplifier to deliver Voltage and current for Class AB AMP


Finally: look sunfire Class TD driver, using 38uh core i

Check all the details, I think its better solution
 

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  • sunfire_amplifier_whitepaper.pdf
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hi mr. Slavkovic

which protection is working well or we need to use?

i make first one but i dont feel safe with it. and then i see there is second modified one by you. i dont try it, mr.timos test it but at the end no one say wich one better or we need to use.

so which one i need to make?

note.: i get some problems with first one this is why i asking this.
 

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  • APEX PA Protect mono mod.JPG
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hi
greetings most chinese amps have this stepdrive
1 2 or 3 pairs 2sc5200 2sa 1943
2 pair of MUR3060
3 pair of mje340 350
4 2sc5198 2sa1941
step drive trrigered from speaker output
thanking you
andrew lebon

share layout or scheme thx

is this correct sir?


share botom silk scren top ssilk sir <email address removed>
 
I want to share file here Sprint Layout 6 file

I decide to share the files here in case new members want to try this classic design the file are Apex H900, Apex H900 Protection, and the Apex H900 PSU


this files please check them carefully I did it already but is good to give a second look, I think is good to leave the file here just in case my PC goes bad :)



I have one question the transformer need 4 x 40V AC on the secondaries if example I can not find one that have 4 x 40 secondaries is possible to use two transformers with 2 x 40 secondaries? ok I guess I'm happy that after so many years of practice is a lot faster for me to to this things ;)


Best regards
Juan
 

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  • Apex H900 Protection and PSU file.zip
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  • Apex H900 layout.jpg
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  • Apex H900 Protection layout.JPG
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  • Apex H900 PSU layout.jpg
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I found a errata on one of the bleeder resistor here is the updated file I might be wrong but I can see that there are two bleeder resistors connected on the same -120V spot is odd to me so I changed but the first files still the same so you can see what I mean
 

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  • Apex H900 V2 PSU updated.zip
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  • Apex H900 PSU layout.JPG
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  • APEX H-class PSU.jpg
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