capacitor supplier

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TUBESMAN

TUBESMAN

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Joined 2004
#1
I need 1% polypropylene, or polystyrene caps to use in an RIAA preamp. I need RoSH compliant units. The values I'd like are 100nF, 33nF, 1nF 50V to 200V is all I need. Any suggestions of a supplier? I emailed Electrocube, twice, but they seem to not want my money .🙁 API looks like they don't make RoHS parts. All the rest of the people that have PP caps are either 5%, 10%, or non-audio grade, i.e. steel wire leads. I cannot say copperweld sounds worse than OFHC copper, but I'm not taking chances. Hopefully, I will need a lot of these. Please, no $20 caps!😱
HELP!!!!
PRC will sell me 0.1% resistors, not cheap but I can get them, so all I need is the caps.
 
#4
I'd love to do just that. But then I'd have to buy an Agilent Labs meter to measure them with decent precision. Not only is it important to have them matched but they need to be the stated values too. The 1nF can be 5% but the others need to be tighter.
 
#5
:scratch2: - 1nF at 1% - I think silver mica caps might be a choice...

Pretty hard to find "cheap" 100nF caps rated 1%. If your application is "tolerant" enough to accept the 2% range then you'll may be a bit luckier...

Capacitors - Silver Mica | Pridmore Corp.

ticktock said:
...

CDE, Epcos, Panasonic, Vishay and Wima (MKP2/4, FKP2/3/4) all make the values you need.
Click to expand...
Good ones! I would include also the Evox Rifa (now under Kemet). They are as good as the CDE, Vishay and Wimas... 🙂

An externally hosted image should be here but it was not working when we last tested it.
 
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#6
Well, for the 1nF I can use 5-10%, as long as it is an audio grade cap i.e. low DF/DA. I might be able to get away with 2% for the other two. I lew of the difficulty I have in getting 1% at present, I might slack off a bit initially. Just to get things out the door. It bugs me tho that companies make what I want as a standard item and ignore my request for a price quote. Parts Express sells a 100nF 1% cap at a very low price, almost too low to believe. Not well described in the catalog and it's voltage rating is a lot higher than I need. That makes it bigger than I'd like.
I just looked at the silvered mica caps, this looks like an option for some values that I need. In fact, I can get a SM that brings my cap closer to the theoretical value I require. All I need now is 33nF and 100nF. For the 1nF I have several choices. The two bigger caps need to be as close to the stated values as possible since they form the EQ network, if they are off then so is the curve. I do not expect the caps I need to be "cheap" just not audio tweako nuts price.
Gold foil with dielectric made from the sperm of spiders!
I will look at the ones specified. I've seen caps 1% in the values I need at "normal" prices, they were meant to be used in normal electronics.
Any and all meaningful suggestions are welcome
 
#7
Let me ask a related question. What is the general opinion of copperweld leads on a capacitor in a high performance audio device? In a low level stage. Most of my grief around getting good caps is because I want non ferrous leads.
 
#8
I am still on a "quest" for the caps I want, but, engineering is the art of compromise. I want this item out the door by the end of the year. So I will get the silvered mica 1nF and the rest will be Vishay 1 and 2% PP. If I reach a point where I can get Electrocube to pay attention to me, I will buy them elsewhere. Any new information on suppliers is still desired. Thanks for the Pridmore link.
 
#9
TUBESMAN said:
I am still on a "quest" for the caps I want, but, engineering is the art of compromise. I want this item out the door by the end of the year. So I will get the silvered mica 1nF and the rest will be Vishay 1 and 2% PP. If I reach a point where I can get Electrocube to pay attention to me, I will buy them elsewhere. Any new information on suppliers is still desired. Thanks for the Pridmore link.
Click to expand...
🙂

I think the silver micas will performe the way you'd like. The Vishays 1 and 2% PP will do it closer to perfection.

Cheers!

P.S.: Please, don't forget to report the results! 🙂
 
#10
I ordered half of the inventory of Pridmore. Vishay had 1% 100nF but only 2% 33nF. I will use them and decide IF I need to make a change after I use up the stock I acquire. I may be very hesitant to replace them because it means I'll need a new PCB layout. Picking caps has been a stonewall to the PCB layout and I'm eager to finish.
 
#12
TUBESMAN said:
Most of my grief around getting good caps is because I want non ferrous leads.
Click to expand...

To quote the old joke, "then don't do that." Science fiction aside, there's absolutely no evidence that there's any advantage to non-ferrous leads on components used in audio circuits, and there's plenty of evidence that it doesn't matter.

My favorites are the tube guys who worry about this, when the pins and internals of the tubes are full of ferrous metals- not to mention the output transformer.
 
#13
Thank you Sy. I trust people that look like porn stars! We've emailed before on various topics. I will put my effort into other areas. Sometimes though, you have to take advantage of superstition to get people to give you money!
As your signature line says, it's the true believers that I want to fleece.
Now I can
 
#14
Karl vd Berg said:
:scratch2: - 1nF at 1% - I think silver mica caps might be a choice...

Pretty hard to find "cheap" 100nF caps rated 1%. If your application is "tolerant" enough to accept the 2% range then you'll may be a bit luckier...

Capacitors - Silver Mica | Pridmore Corp.


Good ones! I would include also the Evox Rifa (now under Kemet). They are as good as the CDE, Vishay and Wimas... 🙂

An externally hosted image should be here but it was not working when we last tested it.
Click to expand...

A very good tip, I use mica all over my phono stage except where there are larger values ​​of capacitors on Rifa phe426 I put a small mica 10pF in parallel that gave me the results I wanted. If I remember correctly, are all Rifa with copper wire.

Anders
 
#15
K.A.B said:
A very good tip, I use mica all over my phono stage except where there are larger values ​​of capacitors on Rifa phe426 I put a small mica 10pF in parallel that gave me the results I wanted. If I remember correctly, are all Rifa with copper wire.

Anders
Click to expand...

Who distributes Rifa? do they have 1-2%. I ordered 30 SM 1nF caps to use in this project. I am likely to very soon order the 100nF,1%, and 33nF,2%, Vishay from Mouser. If I can get 33nF,1%, I'd be in pig heaven.😀
 
#16
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#17
I saw a similar part on Newark's site before. I was dissuaded by the need, for that one, of paying a $20 per order additional shipping fee. For whatever reason it seems to not apply now. That is probably the part I will go with. I did do my homework before I can here for help. Its just that most of what I found wasn't suitable for a variety of reasons. Or, in some case, I overlooked an item. The line up now looks like this: Vishay 100nF 1%, either Vishay 33nF 2% or LCR 33nF 1%, and a 1nF 1% silvered mica.
 
#19
I just placed an order for all the caps I need, I got them from Newark/element14 because I don't like to make really small orders. In the future, with luck and hard work, I will need a lot of these and I will split the order between Newark and Mouser. All these parts, with the exception of the silvered mica caps I ordered from Pridmore, I saw from "The usual suspects" My sourcing goal was 2 fold, a USA maker and non-ferrous "audio" grade. I give up. I just want this finished ASAP! Sad though, I am doing my best to support American business. But I've learned a long time ago that you cannot help those who are not willing to be helped. Thanks for all the help!
 
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