hafler xl-280 problem

zerohead_ak47 · 23rd December 2008, 05:09 PM

hi..i have built hafler xl280 amp..amp has +-47volts power supply( normally amp has+-70dc volts supply)when i turn on the amp it gives large dc.when i turn off the amp it starts to play well until the capacitors discharged..i didnt understand..what can be the problem ?

thanks

zerohead_ak47 · 25th December 2008, 08:58 PM

i built and worked the amp but there is 100mv offset..is it normal ?

d3imlay · 28th December 2008, 06:41 AM

If the power supply is that low, but not blowing fuses, I think maybe the transformer is wired for 240VAC and you are powering it with 120.

23rd December 2008, 05:09 PM	#1
zerohead_ak47 diyAudio Member Join Date: May 2006	hafler xl-280 problem hi..i have built hafler xl280 amp..amp has +-47volts power supply( normally amp has+-70dc volts supply)when i turn on the amp it gives large dc.when i turn off the amp it starts to play well until the capacitors discharged..i didnt understand..what can be the problem ? thanks

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25th December 2008, 08:58 PM	#2
zerohead_ak47 diyAudio Member Join Date: May 2006	i built and worked the amp but there is 100mv offset..is it normal ?

28th December 2008, 06:41 AM	#3
d3imlay diyAudio Member Join Date: Sep 2004 Location: Ohio	If the power supply is that low, but not blowing fuses, I think maybe the transformer is wired for 240VAC and you are powering it with 120.

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