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Old 15th December 2012, 04:06 AM   #2371
mrching is offline mrching  Philippines
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i like this powerful amp thanks.. mile..
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Old 15th December 2012, 05:19 AM   #2372
rizqi is offline rizqi  Indonesia
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[QUOTE=wiljj78;3265171]Hello Rizqi,

Thanks.. This design have not been tested yet i'm still trying to find some error before i etch, but you can also review and let me know if you found any mistake so i can correct the error.

Send me your email add so i can forward you the sprint layout file.

Regards

Your layout is correct but adjust as the distance between the10uF160v 10uf63v...still less loose... nice
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Last edited by rizqi; 15th December 2012 at 05:27 AM.
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Old 15th December 2012, 06:39 AM   #2373
44250 is offline 44250  Serbia
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Quote:
Originally Posted by mrching View Post
i like this powerful amp thanks.. mile..

It looks very very nice! How much power have you acchived and how good do those heatsinks cool it down? I am asking because i am trying to build one 500W amp so i need some guidance,clue how big the heatsink should be for that power.
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Old 15th December 2012, 07:24 AM   #2374
mrching is offline mrching  Philippines
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this heat sink i use is a bit small that's why i use two fan to cool it down.
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Old 15th December 2012, 08:07 AM   #2375
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Quote:
Originally Posted by mrching View Post
i like this powerful amp thanks.. mile..
Nice work,
Regards
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Old 16th December 2012, 06:53 AM   #2376
rizqi is offline rizqi  Indonesia
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Hi mr. Mile .... I have built 2 units of Apex H900
and now I am building a 3rd H900 apex with two transformer-30 Amphere 55vac-47vac-0-47vac-55vac. and 4x10000uf 75V (Sprague).
My question is: can use 95vac-47vac-0-47vac-95vac?
output transistor using original MJLJL3281A (NPN) MJL1302A (PNP) ...
thanks and regards.
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Old 20th December 2012, 01:37 AM   #2377
nugroho is offline nugroho  Indonesia
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still in progress:
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Old 21st December 2012, 11:25 AM   #2378
rizqi is offline rizqi  Indonesia
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Thumbs up H900

3rd H900 - my Project
30A transformator 80vac- 40vac-0-40vac-80vac
output transistor using original MJL3281A (NPN) MJL1302A (PNP)
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Last edited by rizqi; 21st December 2012 at 11:27 AM.
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Old 21st December 2012, 12:18 PM   #2379
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Originally Posted by rizqi View Post
3rd H900 - my Project
30A transformator 80vac- 40vac-0-40vac-80vac
output transistor using original MJL3281A (NPN) MJL1302A (PNP)
Nice work, I sugest to rotate modules 180deg (heatsinks near transformers.
Regards
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Old 21st December 2012, 03:34 PM   #2380
44250 is offline 44250  Serbia
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Quote:
Originally Posted by apexaudio View Post
Nice work, I sugest to rotate modules 180deg (heatsinks near transformers.
Regards
That is good suggestion-even the tunnel would be better formed so more air would go through heatsink(s)!

It looks great are those 10 000uF or 100 000uF capacitors?
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