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Old 8th June 2004, 07:02 AM   #1
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Default Its finally time for SkinnyBoy to make an amp...

not because he NEEDs one, but because he has sixteen 4700uF 100volt chasis mount caps, and three 250VA transformers.... first things first, I need to buy another three toroidals... +-75 volt rails, I was thinking about the mosfet amp on Rod Elliots site... umm... will this amp give 600watts into 4 ohms?? or aren't the mosfets adequate enough? I think thats my only question for now..
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Old 8th June 2004, 07:05 AM   #2
Jean is offline Jean  United States
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have you looked at http://www.aussieamplifiers.com/ampkits.htm ?
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Old 8th June 2004, 07:24 AM   #3
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Quote:
Originally posted by Jean
have you looked at http://www.aussieamplifiers.com/ampkits.htm ?
hmm... I'll think about it.... lol
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Old 8th June 2004, 12:57 PM   #4
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well... that went well.. lol

and I have a question reguarding those amps... they say in the PDF (I am refering to the 800watt amp btw) that a toroidal transformer with a load voltage of 65volts AC is required... right? well... is that at full load or what? I just measured my 9 + 9 volt 250va toroidals, and with about 12amps on one secondary, the voltage dropped to 8 volts... which would mean I would need 8 transformers total... but, then the no load voltage is 9.3 volts..... which means the DC voltage will exceed the reccomended capacitors suggested in the PDF file (it suggests 100volt) OR does it mean 65volts AC, but NOT at FULL load... inwhich case I COULD use 7 transformers total.. lol SEEYA!
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Old 8th June 2004, 02:31 PM   #5
Jay is offline Jay  Indonesia
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Oh, skinnyBoy.... I thought you were designing your own amp that I felt so jealous with your learning curve But I'm not worry now hehehe
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Old 8th June 2004, 02:34 PM   #6
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Quote:
Originally posted by Jay
Oh, skinnyBoy.... I thought you were designing your own amp that I felt so jealous with your learning curve But I'm not worry now hehehe

haha, no.. nothing to worry about maybe oneday... probably not though... whats the point? my friend at Uni was doing that, he had no idea what he was doing, so he came to me for help, I couldn't help, so he went and copied someones work from last year.. lol
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Old 8th June 2004, 05:46 PM   #7
rabbitz is offline rabbitz  Australia
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Rod's mosfet P101 has max voltage of +/- 70V and it's rated at 250W RMS into 4 ohms with 380W peak.

600W......... what are you using this for??????
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Old 9th June 2004, 02:37 AM   #8
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Quote:
Originally posted by rabbitz
Rod's mosfet P101 has max voltage of +/- 70V and it's rated at 250W RMS into 4 ohms with 380W peak.

600W......... what are you using this for??????

yeah, good point... I didn't actually READ it, I was looking at the peak power table..

as for the AV800..... where can I get the mosfets? and how much are they? and.... if I have to match them, its abit annoying.... :S
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Old 9th June 2004, 03:35 AM   #9
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ok.... 7 transformers it is... lol making the AV800...

nominal rails of +-87 or so volts...... hmmmm I don't like it....
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