Suitable capacitor types for Cdom

Shaun · 16th August 2001, 11:59 AM

Hi, all

Does anyone have opinions on what type of capacitor is suitable as Cdom?

TIA
Shaun

jam · 16th August 2001, 12:30 PM

Silver mica or polystyrene.

Jam

Shaun · 16th August 2001, 02:15 PM

Thanks, Jam.

What characteristics make silver mica and polystyrene most suitable?

Shaun

Samuel Jayaraj · 16th August 2001, 02:18 PM

Jam is spot-on right. Between the two, I'd choose silver mica, not so much for its sonic qualities but because of its tight tolerance and better reliability. Sometimes, polyestyrene caps get quite easily damaged physically or are shorted, if the amplifier goes into oscillation for some reason.

Sonically, both are excellent.

jam · 16th August 2001, 06:45 PM

Shaun,

My first choice is silver mica followed by polystyrene. Sam is correct in saying that polystyrene is not as reliable as silver mica.
Both the types of capacitors have excellent high frequency characteristics. Stay away from ceramics.

Jam

ppl · 16th August 2001, 07:45 PM

I have Heared that silver micas can have Nonlinearities at low voltages. So i would think Polystyrene types to Be safe. But Ya these types are sensitive to abuse and most Board wash solvents, Can indeed short, but i have used them as well as silver Micas for years with good luck on Both. I would be interested if anyone has any info on Silvermicas becoming nonlinear at low voltages?

Yomanze · 21st October 2007, 04:40 PM

What about Metalised Polyester Film caps? I've not much experience on the matter.

16th August 2001, 11:59 AM	#1
Shaun diyAudio Member Join Date: Aug 2001 Location: Cape Town, South Africa	Hi, all Does anyone have opinions on what type of capacitor is suitable as Cdom? TIA Shaun __________________ Shaun Onverwacht \|\|\|\|\|\|\|\|\|\| DON'T PANIC \|\|\|\|\|\|\|\|\|\|

16th August 2001, 02:15 PM	#3
Shaun diyAudio Member Join Date: Aug 2001 Location: Cape Town, South Africa	Thanks, Jam. What characteristics make silver mica and polystyrene most suitable? Shaun __________________ Shaun Onverwacht \|\|\|\|\|\|\|\|\|\| DON'T PANIC \|\|\|\|\|\|\|\|\|\|

16th August 2001, 02:18 PM	#4
Samuel Jayaraj diyAudio Member Join Date: May 2001 Location: Bangalore, India	Jam is spot-on right. Between the two, I'd choose silver mica, not so much for its sonic qualities but because of its tight tolerance and better reliability. Sometimes, polyestyrene caps get quite easily damaged physically or are shorted, if the amplifier goes into oscillation for some reason. Sonically, both are excellent. __________________ Sam

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16th August 2001, 12:30 PM	#2
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Silver mica or polystyrene. Jam

16th August 2001, 06:45 PM	#5
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Shaun, My first choice is silver mica followed by polystyrene. Sam is correct in saying that polystyrene is not as reliable as silver mica. Both the types of capacitors have excellent high frequency characteristics. Stay away from ceramics. Jam

16th August 2001, 07:45 PM	#6
ppl diyAudio Member Join Date: Apr 2001 Location: Seattle, WA U.S.A.	I have Heared that silver micas can have Nonlinearities at low voltages. So i would think Polystyrene types to Be safe. But Ya these types are sensitive to abuse and most Board wash solvents, Can indeed short, but i have used them as well as silver Micas for years with good luck on Both. I would be interested if anyone has any info on Silvermicas becoming nonlinear at low voltages?

21st October 2007, 04:40 PM	#7
Yomanze diyAudio Member Join Date: May 2007	What about Metalised Polyester Film caps? I've not much experience on the matter.

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