Non Polar Capacitors

mixmonster · 5th September 2004, 02:40 PM

Hi Folks,
Pretty new to electronics just a pretty simpe question...
Does anyone know of any very high end non polar audio caps (around the 22pf - 33pf) range (Polypropolene???)

Plus are Vishay (Polypropolene) orange drop caps non polar???

Thanks.

Mix.....

badman · 5th September 2004, 03:01 PM

Yes, the orange drops are non-polar. www.diycable.com stocks some caps that will get up in to your range (polyprops) designed for audio, or you can search for any non-inductively wound poly caps in www.mouser.com. Solen, available from www.partsexpress.com has polyprops available in large sizes, and www.angela.com has poly in oil caps in that sort of size, IIRC. Also search ASC oil for large motor run caps on ebay.

baggystevo82 · 5th September 2004, 03:06 PM

Hello,
Any Idea if the X2 mains rated polyproylene caps would be ok for input caps?
Cheers
Steve

badman · 5th September 2004, 04:26 PM

Well, IIRC, they're non-inductive (or at least largely so) so that's good for the audio purpose, but as to how they sound, you've got me, I've only used them for their intended purpose and in power supplies. Input caps are frequently so small, I'd be inclined to go with a known good..... in my own tube pre, I used a 10 nF silver mica, which are excellent for audio, when they fit.

baggystevo82 · 5th September 2004, 10:21 PM

Hello,
At the moment im building Marcello Pellerano's headphone version of the Zen, which calls for a 4.7uF (around about) input cap, so silver mica's are definitely out of the question!
Cheers
Steve

badman · 6th September 2004, 11:54 AM

Well, look at the impedances involved. What sort of load is it going to be feeding? If it's >1M, as many tube inputs are, you can likely use a tiny cap in place of the 4.7uF

baggystevo82 · 6th September 2004, 09:33 PM

It's this one...if you have any thoughts
http://headwize.com/projects/showfil...lerano_prj.htm

badman · 7th September 2004, 02:08 AM

Hahaha- I was thinking of a little SE tube zen amp. This value seems reasonable, I bet you'd be okay as low as 1uF, but certainly an SM isn't appropo.

Bill Fitzpatrick · 7th September 2004, 03:07 AM

Unless there is something wrong with the letters on my monitor, the original poster asked about 22pf - 33pf caps.

So, in answer, silver mica or polystyrene are the best choices.

badman · 7th September 2004, 01:22 PM

Hahahhaa- I was just telling my wife how people's expectations make them blind idiots sometimes.... I was thinking of uF from the original post, not pF. For that tiny value, silver mica is a GREAT affordable choice.

5th September 2004, 02:40 PM	#1
mixmonster diyAudio Member Join Date: Sep 2004 Location: London	Non Polar Capacitors Hi Folks, Pretty new to electronics just a pretty simpe question... Does anyone know of any very high end non polar audio caps (around the 22pf - 33pf) range (Polypropolene???) Plus are Vishay (Polypropolene) orange drop caps non polar??? Thanks. Mix.....

5th September 2004, 03:01 PM	#2
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Yes, the orange drops are non-polar. www.diycable.com stocks some caps that will get up in to your range (polyprops) designed for audio, or you can search for any non-inductively wound poly caps in www.mouser.com. Solen, available from www.partsexpress.com has polyprops available in large sizes, and www.angela.com has poly in oil caps in that sort of size, IIRC. Also search ASC oil for large motor run caps on ebay. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

5th September 2004, 04:26 PM	#4
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Well, IIRC, they're non-inductive (or at least largely so) so that's good for the audio purpose, but as to how they sound, you've got me, I've only used them for their intended purpose and in power supplies. Input caps are frequently so small, I'd be inclined to go with a known good..... in my own tube pre, I used a 10 nF silver mica, which are excellent for audio, when they fit. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

6th September 2004, 11:54 AM	#6
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Well, look at the impedances involved. What sort of load is it going to be feeding? If it's >1M, as many tube inputs are, you can likely use a tiny cap in place of the 4.7uF __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

7th September 2004, 02:08 AM	#8
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Hahaha- I was thinking of a little SE tube zen amp. This value seems reasonable, I bet you'd be okay as low as 1uF, but certainly an SM isn't appropo. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!


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5th September 2004, 03:06 PM	#3
baggystevo82 diyAudio Member Join Date: Dec 2003 Location: Herefordshire	Hello, Any Idea if the X2 mains rated polyproylene caps would be ok for input caps? Cheers Steve

5th September 2004, 10:21 PM	#5
baggystevo82 diyAudio Member Join Date: Dec 2003 Location: Herefordshire	Hello, At the moment im building Marcello Pellerano's headphone version of the Zen, which calls for a 4.7uF (around about) input cap, so silver mica's are definitely out of the question! Cheers Steve

6th September 2004, 09:33 PM	#7
baggystevo82 diyAudio Member Join Date: Dec 2003 Location: Herefordshire	It's this one...if you have any thoughts http://headwize.com/projects/showfil...lerano_prj.htm

7th September 2004, 03:07 AM	#9
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	Unless there is something wrong with the letters on my monitor, the original poster asked about 22pf - 33pf caps. So, in answer, silver mica or polystyrene are the best choices.

7th September 2004, 01:22 PM	#10
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Hahahhaa- I was just telling my wife how people's expectations make them blind idiots sometimes.... I was thinking of uF from the original post, not pF. For that tiny value, silver mica is a GREAT affordable choice. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

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