Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th January 2002, 05:22 AM   #1
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Question 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.
  Reply With Quote
Old 14th January 2002, 09:28 AM   #2
djdan is offline djdan  Romania
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 !
  Reply With Quote
Old 14th January 2002, 09:42 AM   #3
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
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.
  Reply With Quote
Old 14th January 2002, 08:01 PM   #4
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
  Reply With Quote
Old 15th January 2002, 05:46 PM   #5
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Golly, that looks a lot like the output stage to
my X150, rated at 150 watts.
  Reply With Quote
Old 15th January 2002, 10:02 PM   #6
diyAudio Member
 
Join Date: Nov 2001
Send a message via ICQ to WhtCastle Send a message via AIM to WhtCastle Send a message via Yahoo to WhtCastle
Drop that baby down a couple ohms and lets cook some food on that sucker
__________________
/WhtCastle
  Reply With Quote
Old 16th January 2002, 01:08 AM   #7
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
Join Date: Oct 2001
Location: Queensland, Australia
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
  Reply With Quote
Old 16th January 2002, 05:12 AM   #8
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Looks pretty puny compared to your X1000, doesn't it Neslon.
  Reply With Quote
Old 16th January 2002, 08:19 AM   #9
djk is offline djk
diyAudio Member
 
djk's Avatar
 
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.
  Reply With Quote
Old 16th January 2002, 08:27 AM   #10
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
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
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mosfet Amplifier Telnet100 Solid State 4 8th August 2012 09:53 PM
MOSFET amplifier ash_dac Solid State 6 5th December 2006 08:55 AM
MOSFET/MOSFET amplifier jarek Pass Labs 21 22nd June 2004 05:04 PM


New To Site? Need Help?

All times are GMT. The time now is 01:11 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2