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Old 29th November 2010, 01:35 AM   #1
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Default film capacitors, identify?

Hey all, first time posting. Been doing a lot of forum reading and also scavenging from my local electronics surplus store.

Picked up these capacitors, and wondering if someone could help identify. I'm not familiar with the markings, and don't know if one can decipher the dielectric.

Also, one primary concern is the largest one. It says .1M, is this microfarad (that's the box they were in.. but some were in the wrong boxes..) I've never seen it written with an uppercase M before, but then again I haven't ever had to play with film caps.

Hoping that some of these might be good for the DC blocking cap in the signal path of a headphone amp.

Thanks,
Brian
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Old 3rd December 2010, 07:18 PM   #2
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Default capacitor ID

Seem no one has helped! I believe that the M is the tolerance of the .1uf (M= +or - 20%). The other two have K which is a tolerance of +or- 10%. Google capacitor Coding and you will find the rest of the tolerance codes. Good luck.
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Old 3rd December 2010, 07:44 PM   #3
Elvee is offline Elvee  Belgium
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The values are pretty obvious. The dielectrics aren't.
I have a gut feeling that they all are are polypropylene, but a measurement of tan delta would be required to positively confirm it.
The left one is probably a plain foil type, considering its CV vs. size, the middle one is certainly a metallized one (perhaps mylar too).

Ps

All are way too small to serve as coupling caps for headphones. You'd loose all of the bass.
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Old 3rd December 2010, 08:14 PM   #4
godfrey is offline godfrey  South Africa
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From left to right, they look like 0.1uF, 0.15uF and 0.47uF
I would have guessed they're Polyester / Mylar but maybe Elvee's right. The 0.47uF could be good for DC blocking at the amp's input, depending on the input impedance.
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Old 21st March 2011, 07:10 PM   #5
masood is offline masood  India
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150nf & 1n8 what wil in micro farad
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Old 21st March 2011, 10:07 PM   #6
mjf is offline mjf  Austria
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hello.
divided by 1000:
150nF = 0,150uF
1,8nF = 0,0018uF
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Old 31st March 2011, 04:20 PM   #7
masood is offline masood  India
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picture of mylar,styroflex and tubular type of capacitor.
thanking you
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Old 17th April 2011, 07:18 PM   #8
masood is offline masood  India
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Talking capacitor

can any body show/recognized me the picture of mylec,styroflex and tubular type of capacitor
thanking you
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Old 17th April 2011, 07:32 PM   #9
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by masood View Post
can any body show/recognized me the picture of mylec,styroflex and tubular type of capacitor
thanking you
Post your own pics then, or have a look here:
Mystery Parts Challenge
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Old 17th April 2011, 07:36 PM   #10
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No, nobody can do that because they come in all sorts of package styles - there is no single package type associated with a given type of dielectric.

As for the caps originally shown, the first is probably an obsolete type manufactured by TSC electronics. It may be a polyester type made for AC duty. The second is most likely a polyester metallized film cap due to the small size for its capacitance. The third is a question mark.
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