Power amp design?

6502dude · 19th January 2006, 07:23 PM

I have a pair of 35-0-35 vac (280VA) transformers, lots of heatsinks, and a wide selection of parts salvaged over the years.

I'm looking for suggestion of power amp circuit design to use to build a decent power amp.

Thanks!

K-amps · 19th January 2006, 07:32 PM

Join the Krell Klone group.

You might not be able to get to full 50w pure class-A but even 20 watt pure class-A with 100 watt class-AB will make a nice amp based on your Trafo's.

I have some original Klone PCB's for the MJL devices and Mark has the Pinkmouse PCB's with TO-3 metal cans, take your pick.

Join the thread.... Mark also has some extra PCB's available.

More info in the Wiki...see my signature.

mastertech · 19th January 2006, 10:59 PM

with salvaged parts you cant beat the Zen series designs at passdiy.com

enjoy the music!

AndrewT · 20th January 2006, 07:50 AM

Hi,
2 * 35Vac will give about +-50Vdc PSU. With 280VA I suggest looking for 100W into 8ohm classAB amplifiers.
Your PSU will support a stereo amp of 100W+100W or a monoblock 200w into 4ohm.

If you really want to use up heatsinks then a high bias design might suit in which case a FET output stage as Borbely might be even better.

Good luck.

edl · 20th January 2006, 09:02 AM

Hey members, 4502dude said, he has got a pair of these trafos.
So they will easly handle a 2×200W/4ohm stereo amp.

Dear 6502dude!

You are looking for an audiophile-hifi amp, or a general purpouse PA-amp?

Regards,

19th January 2006, 07:23 PM	#1
6502dude diyAudio Member Join Date: Apr 2005 Location: Toronto, Ontario	Power amp design? I have a pair of 35-0-35 vac (280VA) transformers, lots of heatsinks, and a wide selection of parts salvaged over the years. I'm looking for suggestion of power amp circuit design to use to build a decent power amp. Thanks!

20th January 2006, 07:50 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, 2 * 35Vac will give about +-50Vdc PSU. With 280VA I suggest looking for 100W into 8ohm classAB amplifiers. Your PSU will support a stereo amp of 100W+100W or a monoblock 200w into 4ohm. If you really want to use up heatsinks then a high bias design might suit in which case a FET output stage as Borbely might be even better. Good luck. __________________ regards Andrew T.

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19th January 2006, 07:32 PM	#2
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	Join the Krell Klone group. You might not be able to get to full 50w pure class-A but even 20 watt pure class-A with 100 watt class-AB will make a nice amp based on your Trafo's. I have some original Klone PCB's for the MJL devices and Mark has the Pinkmouse PCB's with TO-3 metal cans, take your pick. Join the thread.... Mark also has some extra PCB's available. More info in the Wiki...see my signature.

19th January 2006, 10:59 PM	#3
mastertech Banned Join Date: Mar 2005 Location: Australia	with salvaged parts you cant beat the Zen series designs at passdiy.com enjoy the music!

20th January 2006, 09:02 AM	#5
edl diyAudio Member Join Date: Oct 2004	Hey members, 4502dude said, he has got a pair of these trafos. So they will easly handle a 2×200W/4ohm stereo amp. Dear 6502dude! You are looking for an audiophile-hifi amp, or a general purpouse PA-amp? Regards,

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