Bridge Rectifier question - Page 2

Karakacha · 14th January 2006, 11:16 AM

please my friend ,as per the circuit ,the caps that you replaced could have worked though the problem could have been the generated noise due the ripple factor on the supply, but try to confirm the functioning of other components.

dnsey · 14th January 2006, 12:23 PM

If the polarity of the caps was wrong, that might well have damaged the rectifier. Unfortunately, it might also have damaged the caps

poobah · 14th January 2006, 02:13 PM

If the polarity was wrong... it may take 20 minutes or more but he caps would have exploded! You would have known!

This could be just a simple rectifier problem... but you should look for other problems first...

Ping

anatech, he is an amplifier doctor of many years.

richie00boy · 14th January 2006, 02:18 PM

20 minutes! In my experience incorrectly polarised caps blow at switch on, and what a bang and mess they make!

The bridge rectifier you intend to use will be fine. I would look to increase the capacitors back to the original value of capacitance though, usually going down in capacitance is worse for performance.

Cortez · 15th January 2006, 04:15 PM

4 MBR10100 in a rectifier bridge will be enough in current
to charge a 33000uF/63V cap in the starting phase ?
With a soft-start circuit of course (relay + timing + resistor).

14th January 2006, 11:16 AM	#11
Karakacha diyAudio Member Join Date: Sep 2005	rectifier please my friend ,as per the circuit ,the caps that you replaced could have worked though the problem could have been the generated noise due the ripple factor on the supply, but try to confirm the functioning of other components.

14th January 2006, 02:18 PM	#14
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	20 minutes! In my experience incorrectly polarised caps blow at switch on, and what a bang and mess they make! The bridge rectifier you intend to use will be fine. I would look to increase the capacitors back to the original value of capacitance though, usually going down in capacitance is worse for performance. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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14th January 2006, 12:23 PM	#12
dnsey diyAudio Member Join Date: Mar 2004 Location: Shropshire, England	If the polarity of the caps was wrong, that might well have damaged the rectifier. Unfortunately, it might also have damaged the caps

14th January 2006, 02:13 PM	#13
poobah diyAudio Member Join Date: Nov 2005	If the polarity was wrong... it may take 20 minutes or more but he caps would have exploded! You would have known! This could be just a simple rectifier problem... but you should look for other problems first... Ping anatech, he is an amplifier doctor of many years.

15th January 2006, 04:15 PM	#15
Cortez diyAudio Member Join Date: Dec 2002 Location: Hungary	4 MBR10100 in a rectifier bridge will be enough in current to charge a 33000uF/63V cap in the starting phase ? With a soft-start circuit of course (relay + timing + resistor).

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