Can anyone ID this cap?

DigitalJunkie · 2nd January 2011, 07:21 AM

Hey Guys,

I was just wondering if anyone would recognize this capacitor. It's at least as old as the early 1980's (~30years old),and I'm just wondering if it's still good (film,etc.),or if I should order up some new ones.

Here's a picture
http://i199.photobucket.com/albums/a.../PICT00012.jpg

It says:
NP
TSI-7714
PXA20NV30
20uF-30VNP

To me it seems to be some kind of non-electrolytic (film?) cap,with sealed ends.

I'm off to Google it a bit more..

tomchr · 2nd January 2011, 07:40 AM

Yeah, film with plastic (polypro, polyester, PS) dielectric would be my guess as well. 20 uF, 30 V. Unless it's shorted, it's probably still good.

~Tom

analog_sa · 2nd January 2011, 08:27 AM

20uF/30v? How many rated like this have you seen? My guess is for bipolar electrolytic.

DigitalJunkie · 2nd January 2011, 09:03 AM

Yea,it's a 20uF Bipolar from a crossover network. I'll see what kinda testing I can do on it,and see if it's still any good. Something with a voltage rating higher than 30 volts might be good too.

jacco vermeulen · 2nd January 2011, 09:46 AM

FILM cap, 30V metallised Polyester.
~ 1975 loudspeaker ?

DigitalJunkie · 2nd January 2011, 01:50 PM

Yea,DIY jobbies made in about 1983 or so.

They seem to be in good shape,so I guess I'll reuse them for now. I might want to find some with a higher voltage rating later on.

davidsrsb · 2nd January 2011, 03:12 PM

It's far too small to be a film type and must be a bipolar electrolytic.

jacco vermeulen · 03:20 PM

FIVE 30UF 30V 5% Metallized Polyester Capacitors - eBay (item 260713484492 end time Jan-04-11 08:34:33 PST)

(looks like an Altec Lansing part from 2nd part '70s, 1st half '80s))

Zen Mod · 2nd January 2011, 03:25 PM

drek - replace it with any decent modern production

if you have place - use motor-run cap

DigitalJunkie · 9th January 2011, 01:46 PM

Quote:

Originally Posted by jacco vermeulen

(looks like an Altec Lansing part from 2nd part '70s, 1st half '80s))

I was thinking the same thing,I've seen very similar looking caps in some old Altec car speakers. (they were built like tanks!)

2nd January 2011, 07:21 AM	#1
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Can anyone ID this cap? Hey Guys, I was just wondering if anyone would recognize this capacitor. It's at least as old as the early 1980's (~30years old),and I'm just wondering if it's still good (film,etc.),or if I should order up some new ones. Here's a picture http://i199.photobucket.com/albums/a.../PICT00012.jpg It says: NP TSI-7714 PXA20NV30 20uF-30VNP To me it seems to be some kind of non-electrolytic (film?) cap,with sealed ends. I'm off to Google it a bit more..

2nd January 2011, 09:46 AM	#5
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	FILM cap, 30V metallised Polyester. ~ 1975 loudspeaker ? __________________ Not so much,.......if it says "ZM" in the corner.

2nd January 2011, 03:16 PM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	FIVE 30UF 30V 5% Metallized Polyester Capacitors - eBay (item 260713484492 end time Jan-04-11 08:34:33 PST) (looks like an Altec Lansing part from 2nd part '70s, 1st half '80s)) __________________ Not so much,.......if it says "ZM" in the corner. Last edited by jacco vermeulen; 2nd January 2011 at 03:20 PM.

2nd January 2011, 03:25 PM	#9
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	drek - replace it with any decent modern production if you have place - use motor-run cap __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

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2nd January 2011, 07:40 AM	#2
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	Yeah, film with plastic (polypro, polyester, PS) dielectric would be my guess as well. 20 uF, 30 V. Unless it's shorted, it's probably still good. ~Tom

2nd January 2011, 08:27 AM	#3
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	20uF/30v? How many rated like this have you seen? My guess is for bipolar electrolytic.

2nd January 2011, 09:03 AM	#4
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Yea,it's a 20uF Bipolar from a crossover network. I'll see what kinda testing I can do on it,and see if it's still any good. Something with a voltage rating higher than 30 volts might be good too.

2nd January 2011, 01:50 PM	#6
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Yea,DIY jobbies made in about 1983 or so. They seem to be in good shape,so I guess I'll reuse them for now. I might want to find some with a higher voltage rating later on.

2nd January 2011, 03:12 PM	#7
davidsrsb diyAudio Member Join Date: Dec 2005 Location: Kuala Lumpur	It's far too small to be a film type and must be a bipolar electrolytic.

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