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Old 11th April 2012, 01:00 PM   #1
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Default Capacitor Identification Help

I deperately need to identify these two caps so that I can order another pair for the other channel in my system.
I believe the one numbe that is blurred said 186K.

What is this in mfd? is that 1.86mfd?
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Old 11th April 2012, 01:50 PM   #2
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More likely 106K = 10 000 000 pF or 0.01uF
and .........685K = 68 000 00 pF or 0.0068uF

Both look about 250V DC
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Old 11th April 2012, 02:00 PM   #3
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It would be best to measure the value of the caps.
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Old 11th April 2012, 02:04 PM   #4
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Originally Posted by KatieandDad View Post
More likely 106K = 10 000 000 pF or 0.01uF
and .........685K = 68 000 00 pF or 0.0068uF

Both look about 250V DC
So if both were in parallel then 7.8mfd is the total value? Just making sure!
It makes sense based on what is sounds like in my circuit, giving a 2.7khz crossover point first order butterworth.
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Old 11th April 2012, 02:20 PM   #5
Elvee is offline Elvee  Belgium
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Most likely 10µF and 6.8µF/250V, the only unknown is the dielectric.
Probably mylar or polypropylene, but anyway for a Xover it makes very little difference.
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Old 11th April 2012, 02:27 PM   #6
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Quote:
Originally Posted by Joseph Crowe View Post
So if both were in parallel then 7.8mfd is the total value? Just making sure!
It makes sense based on what is sounds like in my circuit, giving a 2.7khz crossover point first order butterworth.
0.01uF + 0.0068uF in parallel is 16.8nF.
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Old 11th April 2012, 02:28 PM   #7
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Originally Posted by Elvee View Post
Most likely 10µF and 6.8µF/250V, the only unknown is the dielectric.
Probably mylar or polypropylene, but anyway for a Xover it makes very little difference.
They look physically too small to be 10uF/250V.

As already mentioned - why not measure them on a DMM with Capacitive scale.

If they are part of a loudspeaker crossover then the 0.01uF and 0.0068uF would be too small.

Last edited by KatieandDad; 11th April 2012 at 02:34 PM.
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Old 11th April 2012, 03:08 PM   #8
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Although on one of the capacitors the marking is indistinct, let’s assume that they are marked

106K
ME250

and

685K
ME250

This makes the first one 10µF
The K suffix indicates 10% tolerance
And it should be safe to assume 250v DC working.

Likewise the second sample is 6.8µF, 10%, 250v

I think the dimensions look about right for these values.


The dielectric is not known, but my guess would be polypropylene or polyester film.

I do not recognise the manufacturer’s logo to the right of the value code.

ME probably is the series type allocated by this manufacturer.
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Old 11th April 2012, 06:22 PM   #9
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ok, well here's a stupid question, if both ends are twisted together, then used in a first order crossover...is that parallel or series?
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Old 11th April 2012, 06:28 PM   #10
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parallel
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