Best audio cap

[gengcard]

For Panasonic FC series, if I buy a 1500uF/50V, I must pay 5 USD per one piece, it's so expensive for the suited one. Anyway, I already bought Panasonic cap FC series 470uF/50V for my new gainclone T network and bring them to parallel for getting the capacitance around 1500uF.

 

[SheldonD]

Quote: Today I found Panasonic cap FC series 1500uF/25V in
electronics market 5 pcs just 0.10 USD but I'm not sure that if I connect the capacitor 2 pcs by parallel method, they will be able to endurance supplied voltage 35VDC or not.

Geng you can hook them in series to stand the voltage, but you will have 1/2 of the capacitance. observe polarity of plus hooked to minus (like batteries in flashlight)

 

[gengcard]

Geng you can hook them in series to stand the voltage

Hi SheldonD,

Thank you for the solution, I agree with you for this. If I want 1500uF/50V, I will have to use cap 4 pcs per rail.

 

[yuri777]

Hi
i have a question:

I will building a regulated PSU for my gainclones.
Is it ok to use caps with higher voltage rating than the rail voltage?

Example: If the rail voltage coming out of the rectifier bridges is + - 28V, can i use 10,000Mfd 80V caps for the regulator circuit, instead of 30V rated caps?

Thanks

 

[analog_sa]

Is it ok to use caps with higher voltage rating than the rail voltage?

Two issues. Some fussy people think that elcos sound best operated around 65-80% of rated voltage and after extended use at 28v your caps may not be very safe for use at 80v.

If they are just industial types the sound quality issue may be irrelevant and if you don't foresee use at higher voltages they'll be very reliable at 28v.

 

[Nuuk]

I understood that the voltage rating of a capacitor should be 125% of the voltage that it will 'see' across it's terminals.

So, with 28 volt rails that would require caps rated at 35 volts or higher.

I wasn't aware that using caps rated higher than that would cause a problem, other than that they may be physically too large, or much more expensive.

Some fussy people think that elcos sound best operated around 65-80% of rated voltage

Are you saying that there is no problem using 80 volt rated caps with 28 volt rails providing that they are not re-used at higher voltages in another circuit.

 

[yuri777]

I wasn't aware that using caps rated higher than that would cause a problem, other than that they may be physically too large, or much more expensive.



Are you saying that there is no problem using 80 volt rated caps with 28 volt rails providing that they are not re-used at higher voltages in another circuit.

Thank you NUUK.
I am actually using the regulated circuit in your pages as a guide.

Believe is or not, i can get surplus 10,000Mfd 80V Nichicon caps for $3.95, versus Panasonic P10081-ND 50V 10000µF caps for $18.15, which is why i was wondering.

Thanks

 

[Nuuk]

Believe is or not, i can get surplus 10,000Mfd 80V Nichicon caps for $3.95, versus Panasonic P10081-ND 50V 10000µF caps for $18.15, which is why i was wondering.

They are certainly worth a try at that price!

 

[soundNERD]

TEAPO Caps

How are TEAPO Brand caps?

I couldn't resist buying a bunch of 2200uf/35V caps of theirs for 25 cents each.

Would they be good for power supplyy filtering do you think?

 

[carlosfm]

Believe is or not, i can get surplus 10,000Mfd 80V Nichicon caps for $3.95, versus Panasonic P10081-ND 50V 10000µF caps for $18.15, which is why i was wondering.

Nichicon caps are quite good, and that's a fantastic price.

 

[yuri777]

Speaking of caps Carlos, what type of caps do you recommend to use as bypass (C8, C9, C12, C13) in your regulated PSU circuit?
Are tantalums ok to use?

Thanks

 

[yuri777]

Here is the circuit

 

[carlosfm]

I use polyester caps on those positions.
100v rating, or even 63v, smaller but harder to find (at least here).
It's not so common to find tantalums at ratings above 35v, and I don't recommend the use of these.

 

[yuri777]

Thank you !

 

[cwteoh]

Nichicon caps are quite good, and that's a fantastic price.

carlosfm , do you have any series on this cap prefered?

 

[cwteoh]

Carlosfm,
At GC schematic , 3.3uf polyester. what brand of cap you use (as coupling Cap?)
Do you have any prefer brand for those ceramic cap?

 

[richv]

I want to know what is the best type of capacitor for audio amps? I am talking about the zobal cap, input cap, etc. I already have the power supply built with 4 3300uf Illinois Capacitor caps per rail and one 0.1uf film cap per rail on the PSU board, and one per rail on the amp board itslef. I also have an AC cap across the power input plug and the power switch.

In the signal path Teflon and Silver Mica capacitors are the best, but they do come at a high price and sizing may be an issue depending on the application. Teflon capacitors can be hard to source too with only limited production.
More information can be found here http://my.execpc.com/~endlr/

I personally like the new Panasonic PPS caps a lot, not too expensive and very stable.

Enjoy, Richard.

 

[Betto]

Anyone tryed the new Elna Tonorex electrolytics?

 

[soundNERD]

How about film, glass, tantalum or Niobium Oxide caps??

 

[jackinnj]

I use polyester caps on those positions.
100v rating, or even 63v, smaller but harder to find (at least here).
It's not so common to find tantalums at ratings above 35v, and I don't recommend the use of these.

National Semi recommends polypropylene -- see also the Capacitor Distortion thread -- I ordered a bunch of polypropylene caps on Friday, so we will see. I happen to think that the Xicon polyethylene terephthalate caps are pretty good ---