1kW MOSFET amplifier

Kilowatt · 14th January 2002, 06:22 AM

What does he use for output devices in this amp? http://www.vision.net.au/~anthony/1kwamp.htm

I believe whatever is used in this design would be the best option for me to use in my own big MOSFET amp design. He says they are IRF devices, but doesn't give a specific part number. I find this very frustrating. I would love to know more about that amp, but there is no information on it. That's rediculous.

djdan · 14th January 2002, 10:28 AM

IRFP240 / IRFP9240 - 10 Pairs

You can see a little small amplifier (AV800), similar with the 1Kw, in same Site and you can buy the PCB . If want more power, you can add more IRFP, becouse it is very simple and make a supply with +/-100v. But if you do that , replace all electrolitic capacitors with other with same value but 160v rated.

Becouse IRFP devices are cheap you can run with 16 pairs and it will survive in any circumstances, anywhere , on stage or home, many years.

In my opinion , Mr. Holton make a great design and this amplifier is one of the best on WEB.

I will buy next month PCB for stereo N- Amplifier and AV-800.

New link for Mr Anthony Holton site:
http://www.aussieamplifiers.com/

Link for 800W amp. http://members.optusnet.com.au/~aussieamps/avamp.htm

Link for PCB ( looks great )http://members.optusnet.com.au/~aussieamps/ampkits.htm

Good luck Kilowatt !

AudioFreak · 14th January 2002, 10:42 AM

well Kilowatt lets see what we can deduce from the information he does give us.........

They are IRF devices ....

They are plastic TO-247.....

There is 20 output devices (10 N-channel and 10 P-channel).......

The supply is +/-110V DC

It is a push/pull topology

It has the same noise figures as the symetrical amp he makes therefore it is almost cirtainly the same class.... Class AB in this case....

it outputs 1050W into 4ohms which is which is about 23Amps peak.....

this limits it down to only a couple of suitable devices .... and IRFP240/IRFP9240 would seem to be the most likely suspects.

hope this helps...

also, anthony is a member of this forum so he may even tell you himself.

Kilowatt · 14th January 2002, 09:01 PM

Thanks, that makes two of us that thinks they are probably IRFP240/IRFP9240 devices.

I would love to see the plans for that amp, so, Anthony, if you're listening, may I please have some information about it or plans? I'd appreciate it.

Thanks

Nelson Pass · 15th January 2002, 06:46 PM

Golly, that looks a lot like the output stage to
my X150, rated at 150 watts.

WhtCastle · 15th January 2002, 11:02 PM

Drop that baby down a couple ohms and lets cook some food on that sucker

AudioFreak · 16th January 2002, 02:08 AM

Quote:

Originally posted by Nelson Pass
Golly, that looks a lot like the output stage to
my X150, rated at 150 watts.

Yeah i know

but your X150 has a fair bit more bias current running thru it .... and anyway, you always like to go to extremes dont you

Kilowatt · 16th January 2002, 06:12 AM

Looks pretty puny compared to your X1000, doesn't it Neslon.

djk · 16th January 2002, 09:19 AM

"The supply is +/-110V DC " I wonder how well the IRFP9240 will hold up.When the amp goes to the rail the off side transistors have to stand up to 220V.And if the AC line goes 5% high you have 230V on the 200V part.

AudioFreak · 16th January 2002, 09:27 AM

I guess one can only hope that the rails will sag substantially... anyway ... its rated @ 550W into 8ohms which only needs about +/-93V............. The problem is that IRF dont make any very high power P-Channel Mosfets rated above -200V

14th January 2002, 06:22 AM	#1
Kilowatt diyAudio Member Join Date: Nov 2001 Location: Harlowton, MT, USA	1kW MOSFET amplifier What does he use for output devices in this amp? http://www.vision.net.au/~anthony/1kwamp.htm I believe whatever is used in this design would be the best option for me to use in my own big MOSFET amp design. He says they are IRF devices, but doesn't give a specific part number. I find this very frustrating. I would love to know more about that amp, but there is no information on it. That's rediculous.

15th January 2002, 11:02 PM	#6
WhtCastle diyAudio Member Join Date: Nov 2001	Drop that baby down a couple ohms and lets cook some food on that sucker __________________ /WhtCastle

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mosfet Amplifier	Telnet100	Solid State	1	28th January 2009 02:56 PM
MOSFET amplifier	ash_dac	Solid State	6	5th December 2006 09:55 AM
MOSFET/MOSFET amplifier	jarek	Pass Labs	21	22nd June 2004 06:04 PM

New To Site?	Need Help?
Register to Participate Search Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


<a rel='nofollow' href='http://www.diyaudio.com/openx/www/delivery/ck.php?n=aa5cb2e9&cb=718309' target='_blank'><img src='http://www.diyaudio.com/openx/www/delivery/avw.php?zoneid=3&cb=718309&n=aa5cb2e9' border='0' alt='' /></a>	We're saving for a new server - help us to serve you by Donating Today and become a friend with benefits! Ads on/off / Custom Title / 2009 Tshirt / More PMs / Bigger Images / Advanced printing

14th January 2002, 10:28 AM	#2
djdan diyAudio Member Join Date: Dec 2001 Location: Romania	IRFP240 / IRFP9240 - 10 Pairs You can see a little small amplifier (AV800), similar with the 1Kw, in same Site and you can buy the PCB . If want more power, you can add more IRFP, becouse it is very simple and make a supply with +/-100v. But if you do that , replace all electrolitic capacitors with other with same value but 160v rated. Becouse IRFP devices are cheap you can run with 16 pairs and it will survive in any circumstances, anywhere , on stage or home, many years. In my opinion , Mr. Holton make a great design and this amplifier is one of the best on WEB. I will buy next month PCB for stereo N- Amplifier and AV-800. New link for Mr Anthony Holton site: http://www.aussieamplifiers.com/ Link for 800W amp. http://members.optusnet.com.au/~aussieamps/avamp.htm Link for PCB ( looks great )http://members.optusnet.com.au/~aussieamps/ampkits.htm Good luck Kilowatt !

14th January 2002, 10:42 AM	#3
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	well Kilowatt lets see what we can deduce from the information he does give us......... They are IRF devices .... They are plastic TO-247..... There is 20 output devices (10 N-channel and 10 P-channel)....... The supply is +/-110V DC It is a push/pull topology It has the same noise figures as the symetrical amp he makes therefore it is almost cirtainly the same class.... Class AB in this case.... it outputs 1050W into 4ohms which is which is about 23Amps peak..... this limits it down to only a couple of suitable devices .... and IRFP240/IRFP9240 would seem to be the most likely suspects. hope this helps... also, anthony is a member of this forum so he may even tell you himself.

14th January 2002, 09:01 PM	#4
Kilowatt diyAudio Member Join Date: Nov 2001 Location: Harlowton, MT, USA	Thanks, that makes two of us that thinks they are probably IRFP240/IRFP9240 devices. I would love to see the plans for that amp, so, Anthony, if you're listening, may I please have some information about it or plans? I'd appreciate it. Thanks

15th January 2002, 06:46 PM	#5
Nelson Pass The one and only Join Date: Mar 2001	Golly, that looks a lot like the output stage to my X150, rated at 150 watts.

16th January 2002, 06:12 AM	#8
Kilowatt diyAudio Member Join Date: Nov 2001 Location: Harlowton, MT, USA	Looks pretty puny compared to your X1000, doesn't it Neslon.

16th January 2002, 09:19 AM	#9
djk diyAudio Member Join Date: Feb 2001 Location: USA	"The supply is +/-110V DC " I wonder how well the IRFP9240 will hold up.When the amp goes to the rail the off side transistors have to stand up to 220V.And if the AC line goes 5% high you have 230V on the 200V part.

16th January 2002, 09:27 AM	#10
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	I guess one can only hope that the rails will sag substantially... anyway ... its rated @ 550W into 8ohms which only needs about +/-93V............. The problem is that IRF dont make any very high power P-Channel Mosfets rated above -200V

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)