Bel Canto power modification to 240v

ronenash · 24th May 2007, 06:04 AM

Hi,

I need to convert a pair of Bel Canto M300 amps from 120v to 240v. Knowing the amp has a switching power supply I was assuming it should work on all voltages. Is this the case with the Bel Canto? The label on the back says 120v. Maybe only a fuse change is needed.

Anyone can help with this?

Thanks,
Ronen

MOER · 24th May 2007, 06:23 AM

Depending on the input recitifier configuration, if there is no PFC circuit (which I presume) then the change should be easy.

If the power supply is either a half bridge type or full bridge type, the input rectifier off the mains is wired either as a voltage doubler for 120v and has a full bridge for 240v. It is simply a matter of actaully cutting a jumper wire/pcb trace to get rid of the voltage doubler action

Stephen - Landsman

ronenash · 24th May 2007, 12:55 PM

Stephen thanks for the reply. Does anyone actually know what the configuration in the Bel Canto M300 is like?

I assume it should be an easy change but I do not want to go cutting wires or PCB traces without being sure of the results.

Thanks
Ronen

MOER · 24th May 2007, 02:20 PM

Ronen,

YOu will need someone with some exprience in switchmode power supplies

24th May 2007, 06:04 AM	#1
ronenash diyAudio Member Join Date: Dec 2005 Location: israel	Bel Canto power modification to 240v Hi, I need to convert a pair of Bel Canto M300 amps from 120v to 240v. Knowing the amp has a switching power supply I was assuming it should work on all voltages. Is this the case with the Bel Canto? The label on the back says 120v. Maybe only a fuse change is needed. Anyone can help with this? Thanks, Ronen __________________ ronenash

24th May 2007, 06:23 AM	#2
MOER diyAudio Member Join Date: Aug 2003 Location: SIMI VALLEY CA	Switching supply Depending on the input recitifier configuration, if there is no PFC circuit (which I presume) then the change should be easy. If the power supply is either a half bridge type or full bridge type, the input rectifier off the mains is wired either as a voltage doubler for 120v and has a full bridge for 240v. It is simply a matter of actaully cutting a jumper wire/pcb trace to get rid of the voltage doubler action Stephen - Landsman

24th May 2007, 12:55 PM	#3
ronenash diyAudio Member Join Date: Dec 2005 Location: israel	Stephen thanks for the reply. Does anyone actually know what the configuration in the Bel Canto M300 is like? I assume it should be an easy change but I do not want to go cutting wires or PCB traces without being sure of the results. Thanks Ronen __________________ ronenash

24th May 2007, 02:20 PM	#4
MOER diyAudio Member Join Date: Aug 2003 Location: SIMI VALLEY CA	Bel Canto Ronen, YOu will need someone with some exprience in switchmode power supplies

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