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-   -   What the heck is this electrical component? (http://www.diyaudio.com/forums/parts/61950-what-heck-electrical-component.html)

HolyGhostFire20 4th August 2005 12:32 AM

What the heck is this electrical component?
 
2 Attachment(s)
This is part of the audio board of my teac a-l700p amp. I know what resistors and caps look like, but I have no idea what the long slinder gray component is. Is it a resistor in disguise or something else? The board labels it as BD86 or BD85. Thanks for your time in this matter, Kevin.

Mr Evil 4th August 2005 12:47 AM

They look rather like ferrite beads to me, used to create a small inductance to filter RF.

beerguy0 4th August 2005 01:34 AM

Mr. Evil has it right...
 
Quote:

Originally posted by Mr Evil
They look rather like ferrite beads to me, used to create a small inductance to filter RF.
We use these a lot in the products I work on, as RF filters. We mostly use SMT versions, though.

Leolabs 4th August 2005 02:45 AM

Definitely a ferrite bead.:D

HolyGhostFire20 4th August 2005 03:03 AM

Do ferrite beads affect the sound in a good way or bad way? I am just curious since tripath never mentions it in their spreadsheet.

Mr Evil 4th August 2005 03:19 AM

No components are inherently good or bad for the sound; it depends how they are used. They will look pretty much like a plain piece of wire at audio frequencies, so they shouldn't do any harm, but applied appropriately they will keep high frequency nasties out (or stop them escaping, if they are internally generated), which is of particular importance for switching amps.

Jocko Homo 4th August 2005 05:11 AM

Yes, they are ferrite beads, but they do not create a small inductance to filter RF. Some of you guys need to read up on the basics................

Jocko

jan.didden 4th August 2005 06:22 AM

My vote: 0.1uF 63V film caps...;)

Jan Didden

blr-amp 4th August 2005 07:13 AM

ferrite beads
 
Quote:

Originally posted by Jocko Homo
Yes, they are ferrite beads, but they do not create a small inductance to filter RF.
What else are they doing? A short explanation would be very kind. :)

jan.didden 4th August 2005 08:35 AM

Quote:

Originally posted by janneman
My vote: 0.1uF 63V film caps...;)

Jan Didden

Oops, I looked at the wrong components...:rolleyes:


Jan Didden


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