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Old 19th October 2004, 10:35 PM   #11
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Hi,

I prommissed I 'd be back... took some time and haven't come up with anything new.. Are you still thinking about your irf530 SE project? In the mean time I've gotten a new job, got my ticket to 4 weeks of Ugandan holiday and build a couple of gainclones..

Well if you are.. I would suggest a Zen with Aleph current source.. these can easely be build with a couple of irf530's ..

I quickly draw a suggestion... : active current source doulbes the current output..goodluck
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Old 20th October 2004, 05:34 PM   #12
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hai tschrama
ya iam still thinking of making se with irf 530.since i am preparing for my cisco certifications.i will complete my certification by this week. i will start my projects by next week.did you have any more suggestions,please
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Old 20th January 2005, 07:26 AM   #13
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hello...
this circuit wouldn't output 14W,neither 5w..
max output about 4W at 10ohm load..
AC40 volt throuth half-briage to DC36 Volt..
so output point is 18V,I=U/R=18/10=1.8A,
one chanel waste 64.8 Watte,so Irf530 need a
very large heatsink(32.4W),Use Irf540 or Irfp140
is much fit in this circuit...
P(output)=64.8x0.0625(rate)=4.05W
haha..
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Old 20th January 2005, 10:04 AM   #14
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mr.Dark horse
could you please give me a better circuit .i tried all none of them are singing as good as my powerfoller.i require more volume wit lesser power.so please help
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Old 20th January 2005, 11:04 AM   #15
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you are wellcome!
I design a 3W pur e class-a amp,
alread posted in a new thread,you can search it in this forums!
look:
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Old 20th January 2005, 11:53 AM   #16
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Quote:
haha..




Quote:
could you please give me a better circuit

Quote:
you are wellcome!


MMWWOOOAHAHAHAAA



get serious m8, and do your self and the forum members you try to adivice a favor: get a textbook on electronics
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Old 20th January 2005, 12:52 PM   #17
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yes,it must have something wrong with the forums...
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Old 20th January 2005, 02:41 PM   #18
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Quote:
hello...
this circuit wouldn't output 14W,neither 5w..
max output about 4W at 10ohm load..
AC40 volt throuth half-briage to DC36 Volt..
so output point is 18V,I=U/R=18/10=1.8A,
one chanel waste 64.8 Watte,so Irf530 need a
very large heatsink(32.4W),Use Irf540 or Irfp140
is much fit in this circuit...
P(output)=64.8x0.0625(rate)=4.05W
haha..

OK... watch this and be amazed...


The 40Volt in the circuit is DC...I don't care how you get it. This is than actively regulated down to about 34 Volt to limit the ripple effectively. This will give you about 10Vrms voltage swing, resulting in about 15Watt in 6 ohms. Peak current will be around
2.4 Amperes, so Iq will 1.2A (minimum). Why?? it's magic m8
So you get about 48Watt of dissipation for 15 Watt output... that's not much, but better, way better than a certain two-stage-resistive-loaded-SE-amplifier I spotted....
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Old 20th January 2005, 03:21 PM   #19
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mr.renjiish,you had said that you build the amp for your PC...
don't choose class-a amp..low output power and with large heatsink..
class-ab is more fit for your use,
look,the JLH MOS version can work in class-ab..
IRFP140 current you can set about 300mA,outpout 15W/8ohm:
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Old 20th January 2005, 04:13 PM   #20
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DarkHorse,

please read the JLH 10 watt Class A thread and try to understand why your circuit has some nasty features.. in that thread you can also find some real THD measurements on a good MOSFET implementation of the JLH.. at both 300mA and 1300mA ... It's not that I don't appriciate what you are trying to do here, but a MOSFET JLH is not as straight forward and actually has some caveats which you seem not aware of.. you should be a little bit more causious m8..


gr,
Thijs


PS
JLH MOSFET discussion
http://www.diyaudio.com/forums/showt...957#post287957

measurements
http://www.diyaudio.com/forums/showt...043#post291043
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