100watt guitar amplifier

shreya · 15th August 2010, 07:02 AM

can i give +/-48v to this circuit

what i have to change in the circuit diagram

if anybody have pcb you can send it to me at mounicashreya@ymail.com

ostripper · 15th August 2010, 09:04 AM

NO! Vceo is on the "hairy edge" for those devices (BCxxx BDxxx) , amp can only take + - 35v .... safe at 30-0-30VDC. Tip outputs are only good to 80V rail to rail. Might work for a while , then POOOOFTTT!

OS

wahab · 15th August 2010, 09:14 AM

TIP35C/36C are 100V VCE devices but the drivers BD139/140
are only 80V.
Strange thing is the use of BC559 for the differential.
They are only 30V vce..Better to use BC556B devices...

AndrewT · 15th August 2010, 09:32 AM

Hi,
a 3rd no, just to convince you that this schematic using low voltage devices is intended for use with a low voltage PSU. Probably +-30Vdc to +-35Vdc.
Expect maybe 50W into 8ohm.

Bone · 15th August 2010, 11:13 AM

This an ESP design. If you want the PCB you'll have to buy it from him < 100W Guitar Amplifier (Mk II) > . He makes his living from these designs so it would be unfair, immoral and possibly illegal to spread the pcb layout around.

15th August 2010, 09:04 AM	#2
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	NO! Vceo is on the "hairy edge" for those devices (BCxxx BDxxx) , amp can only take + - 35v .... safe at 30-0-30VDC. Tip outputs are only good to 80V rail to rail. Might work for a while , then POOOOFTTT! OS __________________ Mongrel website , always current and updated : http://67.248.209.21/D%3A/WEBSITE/

15th August 2010, 09:32 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, a 3rd no, just to convince you that this schematic using low voltage devices is intended for use with a low voltage PSU. Probably +-30Vdc to +-35Vdc. Expect maybe 50W into 8ohm. __________________ regards Andrew T.

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15th August 2010, 09:14 AM	#3
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	TIP35C/36C are 100V VCE devices but the drivers BD139/140 are only 80V. Strange thing is the use of BC559 for the differential. They are only 30V vce..Better to use BC556B devices...

15th August 2010, 11:13 AM	#5
Bone diyAudio Member Join Date: Jun 2004 Location: Dorset, UK	This an ESP design. If you want the PCB you'll have to buy it from him < 100W Guitar Amplifier (Mk II) > . He makes his living from these designs so it would be unfair, immoral and possibly illegal to spread the pcb layout around.

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