To decouple or not to decouple.

Colescuttle · 12th September 2006, 08:46 PM

I'm putting together one of Peter's LM3875 kits in a monobloc format. I have 4 Jensen 4 pole electrolytics left over from another project. Would I gain anything sonically by inserting one each in the + and - rails between bridges and amps? I'm using a 300VA/22v Plitron transformer.

Thanks!

Nuuk · 13th September 2006, 07:28 AM

There's one way to find out!

angchuck · 13th September 2006, 08:09 PM

The jensens are so good that you should make a separate velo board and hook them up as shown. If you have 2 caps, then just use one half of the configuration. Then you can compare power supply configurations and have more fun.

Colescuttle · 13th September 2006, 08:38 PM

Your diagram didn't come through. Could you attach it to an email to george_cole*bellsouth.net.

Thanks for the help.

AndrewT · 15th September 2006, 08:13 AM

Hi,
re the 4pole electrolytics.
Can you explain the difference between IN & OUT?
Alternatively, what is connected internally?

angchuck · 15th September 2006, 09:30 AM

Hey Andrew,

This diagram was posted by Chris (ClassD4sure). Maybe the experts in the forum can chime in on how the jensens work.

i don't know how these 4 poles Jensens or BHC's are constructed. But they are polarised with 2 +- terminals, and they are not 2 radial caps rolled into one. Either - terminal works with either, or both + terminals.

Maybe the jensen white papers can help, it didn't really help me answer your question. I have no engineering background.

http://www.jensencapacitors.com/audi...ers/4pole.html

I am pretty much a newbie, but i am always curious. I tried // 2 normal caps in series but that didn't work like i imagined.

Anyway, i was telling George that this was the best configuration i have built for my ucd180 and nigc. The regulated PS was a close second and third would be the capacitance multiplier. But that one runs the amps so hot, i think it might have caused my ucd's some inherent problems. Thus, unregulated snubberised PS would be my unqualified third placed. And 8X Pana FC's straight up were my least preferred, but they are still pretty good.

In the back of my mind, the reputation of Blackgate FK looms.

Chuck

AndrewT · 15th September 2006, 10:35 AM

Hi,
either // (parallel) or series for the pair, not both.

12th September 2006, 08:46 PM	#1
Colescuttle diyAudio Member Join Date: Sep 2006	To decouple or not to decouple. I'm putting together one of Peter's LM3875 kits in a monobloc format. I have 4 Jensen 4 pole electrolytics left over from another project. Would I gain anything sonically by inserting one each in the + and - rails between bridges and amps? I'm using a 300VA/22v Plitron transformer. Thanks!

13th September 2006, 07:28 AM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	There's one way to find out! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

13th September 2006, 08:38 PM	#4
Colescuttle diyAudio Member Join Date: Sep 2006	Thanks, Angchuck. Your diagram didn't come through. Could you attach it to an email to george_cole*bellsouth.net. Thanks for the help.

15th September 2006, 08:13 AM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, re the 4pole electrolytics. Can you explain the difference between IN & OUT? Alternatively, what is connected internally? __________________ regards Andrew T.

15th September 2006, 10:35 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, either // (parallel) or series for the pair, not both. __________________ regards Andrew T.


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15th September 2006, 09:30 AM	#6
angchuck diyAudio Member Join Date: Dec 2005 Location: Silly'pore	Hey Andrew, This diagram was posted by Chris (ClassD4sure). Maybe the experts in the forum can chime in on how the jensens work. i don't know how these 4 poles Jensens or BHC's are constructed. But they are polarised with 2 +- terminals, and they are not 2 radial caps rolled into one. Either - terminal works with either, or both + terminals. Maybe the jensen white papers can help, it didn't really help me answer your question. I have no engineering background. http://www.jensencapacitors.com/audi...ers/4pole.html I am pretty much a newbie, but i am always curious. I tried // 2 normal caps in series but that didn't work like i imagined. Anyway, i was telling George that this was the best configuration i have built for my ucd180 and nigc. The regulated PS was a close second and third would be the capacitance multiplier. But that one runs the amps so hot, i think it might have caused my ucd's some inherent problems. Thus, unregulated snubberised PS would be my unqualified third placed. And 8X Pana FC's straight up were my least preferred, but they are still pretty good. In the back of my mind, the reputation of Blackgate FK looms. Chuck

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