big power amp

nick holme · 29th October 2006, 07:36 AM

Hi all. I have a Bose chassis that someone has lost the heatsinks and amp boards out of - probably took them out to repair and lost them. There are two massive power supplies still inside that give +/- 80v. I'd like to use the chassis to build a new power amp. I have a circuit diagram for a power amp rated at 350w but it only uses +/- 70v. Is there a way of stepping down the voltage or does anyone know of a circuit that will run off 80v.

cheers

Nick

Netlist · 29th October 2006, 08:04 AM

It might be possible to tweak your schematic so it can run on +/-80V.
I’m no expert but posting the diagram will get the attention of the smarter guys.

/Hugo

quasi · 29th October 2006, 08:41 AM

Yes post the circuit. Most are fairly easy to beef up 10-20%.

Cheers
Quasi

nick holme · 29th October 2006, 09:07 AM

OK, will do. But you'll have to leave it with me. I took the mag with the diag to my local newsagent for the details so that he could order it each month for me and he's lost it so I'm going to have to get another copy.

Samuel Jayaraj · 29th October 2006, 10:57 AM

Quasi's N-channel amp (in the Power Amp Under Development thread) should fit the bill perfectly! Why look further, when you have the man himself to help?

29th October 2006, 07:36 AM	#1
nick holme diyAudio Member Join Date: Aug 2006	big power amp Hi all. I have a Bose chassis that someone has lost the heatsinks and amp boards out of - probably took them out to repair and lost them. There are two massive power supplies still inside that give +/- 80v. I'd like to use the chassis to build a new power amp. I have a circuit diagram for a power amp rated at 350w but it only uses +/- 70v. Is there a way of stepping down the voltage or does anyone know of a circuit that will run off 80v. cheers Nick

29th October 2006, 08:41 AM	#3
quasi diyAudio Member Join Date: Sep 2004 Location: Adelaide, Australia	Yes post the circuit. Most are fairly easy to beef up 10-20%. Cheers Quasi __________________ http://sites.google.com/site/quasisdiyaudiosite/

29th October 2006, 10:57 AM	#5
Samuel Jayaraj diyAudio Member Join Date: May 2001 Location: Bangalore, India	Quasi's N-channel amp (in the Power Amp Under Development thread) should fit the bill perfectly! Why look further, when you have the man himself to help? __________________ Sam

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29th October 2006, 08:04 AM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	It might be possible to tweak your schematic so it can run on +/-80V. I’m no expert but posting the diagram will get the attention of the smarter guys. /Hugo

29th October 2006, 09:07 AM	#4
nick holme diyAudio Member Join Date: Aug 2006	OK, will do. But you'll have to leave it with me. I took the mag with the diag to my local newsagent for the details so that he could order it each month for me and he's lost it so I'm going to have to get another copy.

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