Is it ok...

kepa1 · 13th November 2005, 09:37 PM

... If i connect four caps on a bridge rectifier and their pins have contact with each other?

Plus, I inserted and soldered the caps pins to the holes of the rectifier connectors, does it sound allright?

These are my newb questions!

pinkmouse · 13th November 2005, 10:45 PM

Hi Kepa1

It sounds ok, but could you post a pic or drawing so we can make sure for you?

Duo · 13th November 2005, 10:54 PM

Sounds feasible.

You're thinking of connecting these four capacitors directly to the rectifier I take it?

Should be fine; but a picture helps us help you.

kepa1 · 14th November 2005, 09:29 AM

Thanx guys, the photo is on its way for tonight!

kepa1 · 14th November 2005, 05:54 PM

Back home, so here is the photo:

You can see these four caps around the left bridge, each rectifier being bypassed and eventually all caps being connected to each other through the rectifier pins. I've seen it before on the net but it just feels curious because current should go from one cap to another, causing a short circuit or something similar, shouldn't it?

Now I feel more ashamed to ask this question...

AndrewT · 14th November 2005, 06:04 PM

Hi,
Just to complete the picture you could add spike supression caps diagonally across the corners pins. i.e. across the AC input and across the DC output.
If you draw the schematic it is quite normal. It's just that everyone else is so used to using PCB and forgotten about hardwiring but without the wires.

Some are advocating the use of snubbers (series resistor & cap) across each of the diodes instead of just a cap. They claim it reduces the Hi. Freq. hash that would otherwise get sent to the smoothing caps and then only partially attenuated goes into the amplifier or other downstream client.

kepa1 · 15th November 2005, 01:09 PM

Thank you for the tips AndrewT, maybe there is room enough!

But does your answer mean that the set up on the photo is Ok...?

AndrewT · 15th November 2005, 02:47 PM

YES

pinkmouse · 16th November 2005, 09:57 AM

I agree!

kepa1 · 16th November 2005, 07:10 PM

Job done, thank you guys!

But it wasn't an easy one, the bridge pins don't like solder at all, I mean it's like rain drops on the window pane...

And hard wiring a potentiometer isn't funny either

I guess It's were PCB makes sense!

13th November 2005, 09:37 PM	#1
kepa1 diyAudio Member Join Date: Apr 2004 Location: Paris	Is it ok... ... If i connect four caps on a bridge rectifier and their pins have contact with each other? Plus, I inserted and soldered the caps pins to the holes of the rectifier connectors, does it sound allright? These are my newb questions!

13th November 2005, 10:45 PM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Hi Kepa1 It sounds ok, but could you post a pic or drawing so we can make sure for you? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

13th November 2005, 10:54 PM	#3
Duo diyAudio Member Join Date: Jun 2002 Location: Victoria, BC, Canada	Sounds feasible. You're thinking of connecting these four capacitors directly to the rectifier I take it? Should be fine; but a picture helps us help you. __________________ -- Duo, W1ngs, VA7MON, and lesser known handles. -- -- http://www.w1ngselectronics.com -- My Work and Projects --

16th November 2005, 09:57 AM	#9
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	I agree! __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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14th November 2005, 09:29 AM	#4
kepa1 diyAudio Member Join Date: Apr 2004 Location: Paris	Thanx guys, the photo is on its way for tonight!

14th November 2005, 05:54 PM	#5
kepa1 diyAudio Member Join Date: Apr 2004 Location: Paris	Back home, so here is the photo: You can see these four caps around the left bridge, each rectifier being bypassed and eventually all caps being connected to each other through the rectifier pins. I've seen it before on the net but it just feels curious because current should go from one cap to another, causing a short circuit or something similar, shouldn't it? Now I feel more ashamed to ask this question...

14th November 2005, 06:04 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, Just to complete the picture you could add spike supression caps diagonally across the corners pins. i.e. across the AC input and across the DC output. If you draw the schematic it is quite normal. It's just that everyone else is so used to using PCB and forgotten about hardwiring but without the wires. Some are advocating the use of snubbers (series resistor & cap) across each of the diodes instead of just a cap. They claim it reduces the Hi. Freq. hash that would otherwise get sent to the smoothing caps and then only partially attenuated goes into the amplifier or other downstream client.

15th November 2005, 01:09 PM	#7
kepa1 diyAudio Member Join Date: Apr 2004 Location: Paris	Thank you for the tips AndrewT, maybe there is room enough! But does your answer mean that the set up on the photo is Ok...?

15th November 2005, 02:47 PM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	YES

16th November 2005, 07:10 PM	#10
kepa1 diyAudio Member Join Date: Apr 2004 Location: Paris	Job done, thank you guys! But it wasn't an easy one, the bridge pins don't like solder at all, I mean it's like rain drops on the window pane... And hard wiring a potentiometer isn't funny either I guess It's were PCB makes sense!

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