film capacitors, identify?

richab2 · 29th November 2010, 01:35 AM

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

optimationman · 3rd December 2010, 07:18 PM

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.

Elvee · 3rd December 2010, 07:44 PM

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.

godfrey · 3rd December 2010, 08:14 PM

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.

masood · 21st March 2011, 07:10 PM

150nf & 1n8 what wil in micro farad

mjf · 21st March 2011, 10:07 PM

hello.
divided by 1000:
150nF = 0,150uF
1,8nF = 0,0018uF

masood · 31st March 2011, 04:20 PM

picture of mylar,styroflex and tubular type of capacitor.
thanking you

masood · 17th April 2011, 07:18 PM

can any body show/recognized me the picture of mylec,styroflex and tubular type of capacitor
thanking you

Elvee · 17th April 2011, 07:32 PM

Quote:

Originally Posted by masood

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

wrenchone · 17th April 2011, 07:36 PM

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.

3rd December 2010, 07:18 PM	#2
optimationman diyAudio Member Join Date: Sep 2006 Location: West USA	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.

17th April 2011, 07:18 PM	#8
masood diyAudio Member Join Date: Dec 2010 Location: fatehpur	capacitor can any body show/recognized me the picture of mylec,styroflex and tubular type of capacitor thanking you

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3rd December 2010, 07:44 PM	#3
Elvee diyAudio Member Join Date: Sep 2006	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.

3rd December 2010, 08:14 PM	#4
godfrey diyAudio Member Join Date: Nov 2009 Location: Cape Town	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.

21st March 2011, 07:10 PM	#5
masood diyAudio Member Join Date: Dec 2010 Location: fatehpur	150nf & 1n8 what wil in micro farad

21st March 2011, 10:07 PM	#6
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. divided by 1000: 150nF = 0,150uF 1,8nF = 0,0018uF

31st March 2011, 04:20 PM	#7
masood diyAudio Member Join Date: Dec 2010 Location: fatehpur	picture of mylar,styroflex and tubular type of capacitor. thanking you

17th April 2011, 07:36 PM	#10
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	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.