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Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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Old 3rd October 2018, 08:37 AM   #11
RajkoM is offline RajkoM  Bosnia and Herzegovina
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Farnell or Ebay.
Ask for 6,8uF/100V type 344 MKC capacitor.
About a year ago, I bought from Romania via ebay.
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Old 4th October 2018, 01:21 AM   #12
phase is offline phase  United States
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Film capacitors typically start at around 160v, the few I have seen with lower voltage ratings are usually of poor quality. Usually those who are asking for something specific will describe the application.
Seriously need to search, is the Y in DIY.

UK
Greenweld - Welcome - have a decent surplus section
Surplectronics - surplus electronic components - surplus semiconductors
http://www.surplus-electronics.co.uk/ - lots of expensive ex-military stuff
Electronics surplus and science catalogs: Links - not that cheap but have some interesting stuff
Home

Europe
http://www.die-wuestens.de/eindex.htm - german site with loads of odd stuff. Interesting j
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Old 4th October 2018, 02:00 AM   #13
Andersonix is offline Andersonix  Sweden
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capacitor source lookng for
I have need for several 3.3uF 10V Teflon film caps. Could I get 'some film' and make some? How big in diameter would it be?
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Old 4th October 2018, 06:40 AM   #14
goodguys is offline goodguys  United Kingdom
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For a 3.3uf teflon trying paralleling a few of these, Ebay item number 223131716053


What makes you say that a film capacitor with a voltage rating lower than 160volts is poor quality, i purchased a few kemet R60 and F61 which were rated at 100volts each.
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Old 4th October 2018, 06:53 AM   #15
infinia is offline infinia  United States
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Quote:
Originally Posted by goodguys View Post
Hi.

I need low voltage such as 50-100v, capacitance of 100uf or greater.


Many thanks
What is your application?
In low power speakers 50-100V? , most larger values are used in low pass filters where NP electros are the most suitable choice, even on high end!
Oddball parts selected mainly by only one of its build materials is grabbing the wrong end of the stick.
As some folks know there are many types of film caps, metalized, foil etc … some are for small signals and some are for AC power, which do you think you need?
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Last edited by infinia; 4th October 2018 at 07:03 AM.
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Old 4th October 2018, 07:41 AM   #16
goodguys is offline goodguys  United Kingdom
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What i need is a film type capacitor of voltage rating 50volts up to 100 volts. This is for a midrange driver, i have measured the voltage across the driver at a very high sound level and it is only 5 volts. I do not want to pay more for a capacitor just to pay for a higher voltage rating that i shall never use.


I have always found the profit margins digikey and mouser and all the other large players apply to be excessive so am trying to find a different source, am hoping to find someone who had purchased from china, ebay etc with favourable results.
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Old 4th October 2018, 07:55 AM   #17
infinia is offline infinia  United States
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Remember the voltage across a capacitor varies with frequency. Sometimes it's best to rate all caps close to the amplifiers power as a minimum.


Quote:
Im hoping to find someone who had purchased from china, ebay etc with favourable results
That would be my last resort, too many variables, that and cutting costs wont put you on the good side of any equation.
Id suggest the same stores where you can buy decent hi-fi drivers.


Quote:
I have always found the profit margins digikey and mouser and all the other large players apply to be excessive so am trying to find a different source
compared to ?
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Last edited by infinia; 4th October 2018 at 08:09 AM.
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Old 4th October 2018, 08:07 AM   #18
planet IX is offline planet IX  Germany
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Jan Wüstens offers some good film capacitors for a reasonable price
Frag Jan zuerst- Ask Jan first: Roehren und mehr
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Old 4th October 2018, 08:17 AM   #19
goodguys is offline goodguys  United Kingdom
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Comparing it to personal experience. You see my projector broke down and needed a replacment fan, all the shops were asking £30 for a new fan, which is ridiculous, found a compatible fan on a chinese website for a few dollars. Other people have reported the same thing on different websites with different cases that the profit margins applied by the big players is excessive
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Old 4th October 2018, 05:58 PM   #20
Andersonix is offline Andersonix  Sweden
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capacitor source lookng for
Quote:
Originally Posted by goodguys View Post
For a 3.3uf teflon trying paralleling a few of these, Ebay item number 223131716053
Thanks for trying, but those are way too large and a bit expensive.
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