nonpolar capacitors

unsolved · 13th February 2009, 12:32 PM

Hi everybody,

does anybody know where i can get non-polar capacitors in europe? i need 22, 47, 100 and 20 uF, 25-63 V, axial. I have found radial but no axial capacitors.

I need them for my old mci-console....

mjf · 13th February 2009, 03:03 PM

hello.
have a look at speakershops and so.
nonpolar elcaps (in german: bipolar) are often used in crossovernetworks for loudspeakers,so most speakersellers sell them too,e.g. intertechnik , visaton (germany).................
electronic part dealers like conrad,rs-components,...........too.
greetings..........

unsolved · 13th February 2009, 03:14 PM

Thanks for the answer.

Unfortanely there's mostly lower capacitances for speaker usage, or they are too big to fit on the board.... I have seen up to 100 uF, 63 V and they are too big.

Lower capacitances have i found radial capacitors, but no axial...

PeteMcK · 16th February 2009, 09:32 PM

make them yourself... two polarized caps twice the capacitance you want connected in series, + to + or - to - (doesn't matter)...

unsolved · 16th February 2009, 09:43 PM

Has been thinking about that solution. Has anybody tested it, will there be any difference from using "standard" non polarized capacitors??

zoranaudio · 17th February 2009, 12:32 AM

I think Yes, that will be "safer for cap. life" but what about ESR and equal inductance?.
I am also looking, searching for "Elna Silmic" caps from 4,7 to 100 mfd and difficult to find

audio.dream · 20th February 2009, 03:29 PM

In fact,the non-polar capacitors is the same as the traditional capacitor if the basic material is the same.
If you need a 10uF/50V non-polar capacitor,the 10uF/100V capacitor with polarity is the same.
Or you could use two 20uF/25V(22uF is the value in real world) in series.

13th February 2009, 12:32 PM	#1
unsolved diyAudio Member Join Date: Jan 2009	nonpolar capacitors Hi everybody, does anybody know where i can get non-polar capacitors in europe? i need 22, 47, 100 and 20 uF, 25-63 V, axial. I have found radial but no axial capacitors. I need them for my old mci-console....

16th February 2009, 09:32 PM	#4
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Western Sydney	make them yourself... two polarized caps twice the capacitance you want connected in series, + to + or - to - (doesn't matter)... __________________ Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency

17th February 2009, 12:32 AM	#6
zoranaudio diyAudio Member Join Date: Jun 2008	I think Yes, that will be "safer for cap. life" but what about ESR and equal inductance?. I am also looking, searching for "Elna Silmic" caps from 4,7 to 100 mfd and difficult to find __________________ zaudio

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13th February 2009, 03:03 PM	#2
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. have a look at speakershops and so. nonpolar elcaps (in german: bipolar) are often used in crossovernetworks for loudspeakers,so most speakersellers sell them too,e.g. intertechnik , visaton (germany)................. electronic part dealers like conrad,rs-components,...........too. greetings..........

13th February 2009, 03:14 PM	#3
unsolved diyAudio Member Join Date: Jan 2009	Thanks for the answer. Unfortanely there's mostly lower capacitances for speaker usage, or they are too big to fit on the board.... I have seen up to 100 uF, 63 V and they are too big. Lower capacitances have i found radial capacitors, but no axial...

16th February 2009, 09:43 PM	#5
unsolved diyAudio Member Join Date: Jan 2009	Has been thinking about that solution. Has anybody tested it, will there be any difference from using "standard" non polarized capacitors??

20th February 2009, 03:29 PM	#7
audio.dream diyAudio Member Join Date: Feb 2009	In fact,the non-polar capacitors is the same as the traditional capacitor if the basic material is the same. If you need a 10uF/50V non-polar capacitor,the 10uF/100V capacitor with polarity is the same. Or you could use two 20uF/25V(22uF is the value in real world) in series.

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