Nigel Goodwin said:
You're obviously all too young!
Like I said, you used to be able to repair items just by changing the Wima capacitors - no meter or fault finding required.
I go back to the days when Heathkit was making airplanes...and I think that SY is my senior. Of course, back then you didn't see a WIMA unless it was in a Telefunken radio (I guess).
I have blown up a lot of caps -- here's my favorite as it went off like a shotgun shell -- mother nature doesn't like it when you exceed the voltage rating in a cockroft-walton multiplier:
An externally hosted image should be here but it was not working when we last tested it.
this one is pretty dimunitive:
An externally hosted image should be here but it was not working when we last tested it.
jackinnj said:
Here's a link to their datasheet:
http://www.wima.com/EN/WIMA_MKS_2-XL.pdf
Those are nice and small, for their values. The Wima MKS 2-XL 10 uF and 15 uF 16V models have a footprint of only 8.5mm x 7.2 mm, and are 14 mm tall, with 5mm lead-spacing. And the 22 uF 16V model's footprint is only 11mm x 7.2mm, with 16mm height and 5mm lead-spacing. Very nice indeed. The 10 uF 50V model's footprint is only 11mm x 7.2mm. with 16mm height and 5mm lead-spacing. Not bad. In contrast, the Wima MKS_4 10uF 50V model has a footprint of 9mm x 18mm, 16mm height, and 15mm lead-spacing. (The Wima MKS_4 datasheet is at http://www.wima.com/EN/WIMA_MKS_4.pdf ).
I noticed that the Wima MKS_4 10 uF 50V +/-10% model is $5.95 for qty 1, at mouser.com . I wonder what the pricing for the MKS 2-XL models will be.
MKS_4-LN "LOW-NOISE" SERIES:
On the WIMA website, I also noticed that they have an MKS_4-LN series, a "LOW-NOISE" version of the MKS_4 series. They are physically larger than the standard MKS_4 models, and are only available with minimum voltage ratings of 250VDC/160VAC, and only go up to 15 uF. But the datasheet says they are "for applications in sound-sensitive surroundings", and specifically lists "audio/video equipment" among the applications, whereas the MKS_4 (non-"LN") datasheet does not.
The MKS_4-LN datasheet ALSO says that "LN capacitors are up to 20dB(A) less noisy than conventional polyester capacitors". i.e. "One conventional polyester capacitor creates the same noise as 100 LN capacitors". I don't know if that would be significant in normal audio applications, or not. And I don't know to what noise mechanism they are referring. It looks like they are talking about the "mechanical" noise that is produced by the capacitor itself. Has anyone compared them, or tried the MKS_4-LN series caps?
Here's the datasheet for the "LOW NOISE" MKS_4-LN series:
http://www.wima.com/EN/WIMA_MKS_4_LN.pdf
And here's the datasheet for the MKP4 polypropylene caps that were also mentioned: http://www.wima.com/EN/WIMA_MKP_4.pdf
- Tom Gootee
http://www.fullnet.com/~tomg/index.html
Nigel Goodwin said:
You're obviously all too young!
Like I said, you used to be able to repair items just by changing the Wima capacitors - no meter or fault finding required.
70's are far to late - it was 60's and 50's where Wima capacitors were absolute crap!
Hi,
Nigel,
I know what Wima cap you mean, the axial one dipped in black.
Capacitor was very common in old tube amps and radios.
Terrible cap, if present you'd better replace them all as they would all fail sooner or later.
I have been looking for a picture on the net of the cap in question, no success so far.
It would be nice if someone could post a pic of the cap in question.
Re: Re: New 10u/16V WIMA film caps
You also have this one. A little bigger.
You also have this one. A little bigger.
An externally hosted image should be here but it was not working when we last tested it.
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