Capacitor id.

D

David Farber

Guest
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with a
large capacitor. I've not been able to find a replacement cap of the same type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same type
but this amp is going in a big theater system and I don't want a call back. By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646

I called digikey and mouser and neither one seems to have something that
matches this.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
 
The value is not very critical. You can use anything from about 0.047 to
about 0.068 uF. Even a 0.10 would work fine for this application. The
voltage can be from 250 Volts, up to even 1000 Volts rated. The higher the
better.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
=========================================


"David Farber" <farberbear@aol.com> wrote in message
news:20030923220409.23357.00000061@mb-m11.aol.com...
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with a
large capacitor. I've not been able to find a replacement cap of the same
type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same
type
but this amp is going in a big theater system and I don't want a call back.
By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646

I called digikey and mouser and neither one seems to have something that
matches this.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
 
"David Farber" <farberbear@aol.com> wrote in message
news:20030923220409.23357.00000061@mb-m11.aol.com...
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with
a
large capacitor. I've not been able to find a replacement cap of the same
type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same
type
but this amp is going in a big theater system and I don't want a call
back. By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646
Click to expand...

Probably not ceramic, judging by appearance. Probably a polystyrene.
 
David,

This is a pretty common european package style for film caps. I'd
guess that it is either mylar (polyester) or polystyrene. Since it is
across an electrolytic, I'd go with the mylar as a safe replacement.
You might be able to find out more form a supplier/mfg. like Roderstein
(sp?).

Regards,
Tim Schwartz
Bristol Electronics


David Farber wrote:
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with a
large capacitor. I've not been able to find a replacement cap of the same type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same type
but this amp is going in a big theater system and I don't want a call back. By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646

I called digikey and mouser and neither one seems to have something that
matches this.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
Click to expand...
 
Hi Jerry,

I was able to find some suitable values in the .047-.1uF and 250-1kv range from
digikey. It turns out that the higher voltage capacitors actually are a better
physical fit.

Thanks for your reply,
David

Subject: Re: Capacitor id.
From: "Jerry G." jerryg50@hotmail.com
Date: 9/23/2003 11:53 PM Pacific Daylight Time
Message-id: <bkrf1u$6gc$1@news.eusc.inter.net

The value is not very critical. You can use anything from about 0.047 to
about 0.068 uF. Even a 0.10 would work fine for this application. The
voltage can be from 250 Volts, up to even 1000 Volts rated. The higher the
better.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
=========================================


"David Farber" <farberbear@aol.com> wrote in message
news:20030923220409.23357.00000061@mb-m11.aol.com...
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with a
large capacitor. I've not been able to find a replacement cap of the same
type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same
type
but this amp is going in a big theater system and I don't want a call back.
By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646

I called digikey and mouser and neither one seems to have something that
matches this.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
Click to expand...
 
Subject: Re: Capacitor id.
From: "Walter Harley" walterh@cafewalterNOSPAM.com
Date: 9/24/2003 12:04 AM Pacific Daylight Time
Message-id: <bkrfl7$u1a$0@216.39.172.65

"David Farber" <farberbear@aol.com> wrote in message
news:20030923220409.23357.00000061@mb-m11.aol.com...
I'm servicing a JBL S400 which I previously mentioned in a thread
http://tinyurl.com/ofwj about a small capacitor in parallel with
a
large capacitor. I've not been able to find a replacement cap of the same
type.
It's a .05 uf@250V. I'm not sure how important it is to get the exact same
type
but this amp is going in a big theater system and I don't want a call
back. By
the way, what type of cap is this? Ceramic? Here is a photo of the cap:

http://www.pbase.com/image/21634646


Probably not ceramic, judging by appearance. Probably a polystyrene.
Click to expand...
Digikey had some "AC and pulse double metallized polypropylene film" caps that
were a good match. Nowadays, you have to be a materials engineer just to be
able to select a capacitor.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
 
Hi Tim,

I looked up Roederstein which led me to a number of different places. One
tech/salesperson, who represented Vishay capacitors, spent 40 minutes on the
telephone with me going through pages of data sheets until we came up with a
good match.

Thanks for your reply.

David Farber
David Farber's Service Center
L.A., CA
 
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